Lines Matching +full:1 +full:ac
102 * [ group 0 bitmap][ group 0 buddy] [group 1][ group 1]...
135 * 1) Array of largest free order lists (sbi->s_mb_largest_free_orders)
150 * average fragment size >= 2^i and < 2^(i+1). The average fragment size
161 * in the data structure (1) above where largest_free_order = order of the
164 * lookup in O(1) time.
169 * size group lists (data structure 2) in O(1) time.
178 * suitable block group in O(1) time and results in faster allocation at the
275 * 1) if buddy is referenced, it's already initialized
421 static void ext4_mb_new_preallocation(struct ext4_allocation_context *ac);
423 static bool ext4_mb_good_group(struct ext4_allocation_context *ac,
432 * 1. We sample the percpu discard_pa_seq counter before trying for block
534 if (order > e4b->bd_blkbits + 1) { in mb_find_buddy()
541 *max = 1 << (e4b->bd_blkbits + 3); in mb_find_buddy()
684 int order = e4b->bd_blkbits + 1; in __mb_check_buddy()
701 while (order > 1) { in __mb_check_buddy()
704 buddy2 = mb_find_buddy(e4b, order - 1, &max2); in __mb_check_buddy()
714 if (!mb_test_bit(i << 1, buddy2)) { in __mb_check_buddy()
716 mb_test_bit((i<<1)+1, buddy2)); in __mb_check_buddy()
721 /* both bits in buddy2 must be 1 */ in __mb_check_buddy()
722 MB_CHECK_ASSERT(mb_test_bit(i << 1, buddy2)); in __mb_check_buddy()
723 MB_CHECK_ASSERT(mb_test_bit((i << 1) + 1, buddy2)); in __mb_check_buddy()
725 for (j = 0; j < (1 << order); j++) { in __mb_check_buddy()
726 k = (i * (1 << order)) + j; in __mb_check_buddy()
736 fstart = -1; in __mb_check_buddy()
741 if (fstart == -1) { in __mb_check_buddy()
747 fstart = -1; in __mb_check_buddy()
749 for (j = 0; j < e4b->bd_blkbits + 1; j++) { in __mb_check_buddy()
801 max = ffs(first | border) - 1; in ext4_mb_mark_free_simple()
804 min = fls(len) - 1; in ext4_mb_mark_free_simple()
808 chunk = 1 << min; in ext4_mb_mark_free_simple()
826 * We don't bother with a special lists groups with only 1 block free in mb_avg_fragment_size_order()
852 if (grp->bb_avg_fragment_size_order != -1) { in mb_update_avg_fragment_size()
872 static void ext4_mb_choose_next_group_p2_aligned(struct ext4_allocation_context *ac, in ext4_mb_choose_next_group_p2_aligned() argument
875 struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb); in ext4_mb_choose_next_group_p2_aligned()
879 if (ac->ac_status == AC_STATUS_FOUND) in ext4_mb_choose_next_group_p2_aligned()
882 if (unlikely(sbi->s_mb_stats && ac->ac_flags & EXT4_MB_CR_POWER2_ALIGNED_OPTIMIZED)) in ext4_mb_choose_next_group_p2_aligned()
885 for (i = ac->ac_2order; i < MB_NUM_ORDERS(ac->ac_sb); i++) { in ext4_mb_choose_next_group_p2_aligned()
897 if (likely(ext4_mb_good_group(ac, iter->bb_group, CR_POWER2_ALIGNED))) { in ext4_mb_choose_next_group_p2_aligned()
899 ac->ac_flags |= EXT4_MB_CR_POWER2_ALIGNED_OPTIMIZED; in ext4_mb_choose_next_group_p2_aligned()
915 ext4_mb_find_good_group_avg_frag_lists(struct ext4_allocation_context *ac, int order) in ext4_mb_find_good_group_avg_frag_lists() argument
917 struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb); in ext4_mb_find_good_group_avg_frag_lists()
921 enum criteria cr = ac->ac_criteria; in ext4_mb_find_good_group_avg_frag_lists()
933 if (likely(ext4_mb_good_group(ac, iter->bb_group, cr))) { in ext4_mb_find_good_group_avg_frag_lists()
946 static void ext4_mb_choose_next_group_goal_fast(struct ext4_allocation_context *ac, in ext4_mb_choose_next_group_goal_fast() argument
949 struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb); in ext4_mb_choose_next_group_goal_fast()
953 if (unlikely(ac->ac_flags & EXT4_MB_CR_GOAL_LEN_FAST_OPTIMIZED)) { in ext4_mb_choose_next_group_goal_fast()
958 for (i = mb_avg_fragment_size_order(ac->ac_sb, ac->ac_g_ex.fe_len); in ext4_mb_choose_next_group_goal_fast()
959 i < MB_NUM_ORDERS(ac->ac_sb); i++) { in ext4_mb_choose_next_group_goal_fast()
960 grp = ext4_mb_find_good_group_avg_frag_lists(ac, i); in ext4_mb_choose_next_group_goal_fast()
963 ac->ac_flags |= EXT4_MB_CR_GOAL_LEN_FAST_OPTIMIZED; in ext4_mb_choose_next_group_goal_fast()
976 if (ac->ac_flags & EXT4_MB_HINT_DATA) in ext4_mb_choose_next_group_goal_fast()
991 static void ext4_mb_choose_next_group_best_avail(struct ext4_allocation_context *ac, in ext4_mb_choose_next_group_best_avail() argument
994 struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb); in ext4_mb_choose_next_group_best_avail()
999 if (unlikely(ac->ac_flags & EXT4_MB_CR_BEST_AVAIL_LEN_OPTIMIZED)) { in ext4_mb_choose_next_group_best_avail()
1006 * retrieving back the length using (1 << order) inaccurate. Hence, use in ext4_mb_choose_next_group_best_avail()
1010 order = fls(ac->ac_g_ex.fe_len) - 1; in ext4_mb_choose_next_group_best_avail()
1021 if (1 << min_order < num_stripe_clusters) in ext4_mb_choose_next_group_best_avail()
1023 * We consider 1 order less because later we round in ext4_mb_choose_next_group_best_avail()
1026 min_order = fls(num_stripe_clusters) - 1; in ext4_mb_choose_next_group_best_avail()
1029 if (1 << min_order < ac->ac_o_ex.fe_len) in ext4_mb_choose_next_group_best_avail()
1030 min_order = fls(ac->ac_o_ex.fe_len); in ext4_mb_choose_next_group_best_avail()
1039 ac->ac_g_ex.fe_len = 1 << i; in ext4_mb_choose_next_group_best_avail()
1047 ac->ac_g_ex.fe_len = roundup(ac->ac_g_ex.fe_len, in ext4_mb_choose_next_group_best_avail()
1051 frag_order = mb_avg_fragment_size_order(ac->ac_sb, in ext4_mb_choose_next_group_best_avail()
1052 ac->ac_g_ex.fe_len); in ext4_mb_choose_next_group_best_avail()
1054 grp = ext4_mb_find_good_group_avg_frag_lists(ac, frag_order); in ext4_mb_choose_next_group_best_avail()
1057 ac->ac_flags |= EXT4_MB_CR_BEST_AVAIL_LEN_OPTIMIZED; in ext4_mb_choose_next_group_best_avail()
1063 ac->ac_g_ex.fe_len = ac->ac_orig_goal_len; in ext4_mb_choose_next_group_best_avail()
1067 static inline int should_optimize_scan(struct ext4_allocation_context *ac) in should_optimize_scan() argument
1069 if (unlikely(!test_opt2(ac->ac_sb, MB_OPTIMIZE_SCAN))) in should_optimize_scan()
1071 if (ac->ac_criteria >= CR_GOAL_LEN_SLOW) in should_optimize_scan()
1073 if (!ext4_test_inode_flag(ac->ac_inode, EXT4_INODE_EXTENTS)) in should_optimize_scan()
1075 return 1; in should_optimize_scan()
1083 next_linear_group(struct ext4_allocation_context *ac, ext4_group_t group, in next_linear_group() argument
1086 if (!should_optimize_scan(ac)) in next_linear_group()
1089 if (ac->ac_groups_linear_remaining) { in next_linear_group()
1090 ac->ac_groups_linear_remaining--; in next_linear_group()
1100 return group + 1 >= ngroups ? 0 : group + 1; in next_linear_group()
1106 * @ac Allocation Context
1116 static void ext4_mb_choose_next_group(struct ext4_allocation_context *ac, in ext4_mb_choose_next_group() argument
1119 *new_cr = ac->ac_criteria; in ext4_mb_choose_next_group()
1121 if (!should_optimize_scan(ac) || ac->ac_groups_linear_remaining) { in ext4_mb_choose_next_group()
1122 *group = next_linear_group(ac, *group, ngroups); in ext4_mb_choose_next_group()
1127 ext4_mb_choose_next_group_p2_aligned(ac, new_cr, group); in ext4_mb_choose_next_group()
1129 ext4_mb_choose_next_group_goal_fast(ac, new_cr, group); in ext4_mb_choose_next_group()
1131 ext4_mb_choose_next_group_best_avail(ac, new_cr, group); in ext4_mb_choose_next_group()
1137 WARN_ON(1); in ext4_mb_choose_next_group()
1151 for (i = MB_NUM_ORDERS(sb) - 1; i >= 0; i--) in mb_set_largest_free_order()
1203 if (len > 1) in ext4_mb_generate_buddy()
1238 int order = 1; in mb_regenerate_buddy()
1260 * [ group 0 bitmap][ group 0 buddy] [group 1][ group 1]...
1299 groups_per_page = blocks_per_page >> 1; in ext4_mb_init_cache()
1301 groups_per_page = 1; in ext4_mb_init_cache()
1304 if (groups_per_page > 1) { in ext4_mb_init_cache()
1354 group = (first_block + i) >> 1; in ext4_mb_init_cache()
1385 if ((first_block + i) & 1) { in ext4_mb_init_cache()
1476 /* blocks_per_page == 1, hence we need another page for the buddy */ in ext4_mb_get_buddy_page_lock()
1477 page = find_or_create_page(inode->i_mapping, block + 1, gfp); in ext4_mb_get_buddy_page_lock()
1739 int order = 1, max; in mb_find_order_for_block()
1743 BUG_ON(block >= (1 << (e4b->bd_blkbits + 3))); in mb_find_order_for_block()
1745 while (order <= e4b->bd_blkbits + 1) { in mb_find_order_for_block()
1775 * will return first found zero bit if any, -1 otherwise
1780 int zero_bit = -1; in mb_test_and_clear_bits()
1787 if (*addr != (__u32)(-1) && zero_bit == -1) in mb_test_and_clear_bits()
1793 if (!mb_test_and_clear_bit(cur, bm) && zero_bit == -1) in mb_test_and_clear_bits()
1824 return 1; in mb_buddy_adjust_border()
1829 return -1; in mb_buddy_adjust_border()
1836 int order = 1; in mb_buddy_mark_free()
1853 * | 1 | 1 | 1 | 1 | in mb_buddy_mark_free()
1855 * | 0 | 1 | 1 | 1 | 1 | 1 | 1 | 1 | in mb_buddy_mark_free()
1857 * 0 1 2 3 4 5 6 7 in mb_buddy_mark_free()
1860 * Neither [1] nor [6] is aligned to above layer. in mb_buddy_mark_free()
1871 if (first & 1) in mb_buddy_mark_free()
1872 e4b->bd_info->bb_counters[order] += mb_buddy_adjust_border(&first, buddy, -1); in mb_buddy_mark_free()
1873 if (!(last & 1)) in mb_buddy_mark_free()
1874 e4b->bd_info->bb_counters[order] += mb_buddy_adjust_border(&last, buddy, 1); in mb_buddy_mark_free()
1881 mb_clear_bits(buddy, first, last - first + 1); in mb_buddy_mark_free()
1882 e4b->bd_info->bb_counters[order - 1] += last - first + 1; in mb_buddy_mark_free()
1885 first >>= 1; in mb_buddy_mark_free()
1886 last >>= 1; in mb_buddy_mark_free()
1897 int last = first + count - 1; in mb_free_blocks()
1915 left_is_free = !mb_test_bit(first - 1, e4b->bd_bitmap); in mb_free_blocks()
1917 if (last + 1 < EXT4_SB(sb)->s_mb_maxs[0]) in mb_free_blocks()
1918 right_is_free = !mb_test_bit(last + 1, e4b->bd_bitmap); in mb_free_blocks()
1920 if (unlikely(block != -1)) { in mb_free_blocks()
1961 if (first & 1) { in mb_free_blocks()
1963 e4b->bd_info->bb_counters[0] += left_is_free ? -1 : 1; in mb_free_blocks()
1965 if (!(last & 1)) { in mb_free_blocks()
1967 e4b->bd_info->bb_counters[0] += right_is_free ? -1 : 1; in mb_free_blocks()
1971 mb_buddy_mark_free(e4b, first >> 1, last >> 1); in mb_free_blocks()
2001 ex->fe_len = (1 << order) - (block & ((1 << order) - 1)); in mb_find_extent()
2010 if (block + 1 >= max) in mb_find_extent()
2013 next = (block + 1) * (1 << order); in mb_find_extent()
2020 ex->fe_len += 1 << order; in mb_find_extent()
2025 WARN_ON(1); in mb_find_extent()
2064 mlen = !mb_test_bit(start - 1, e4b->bd_bitmap); in mb_mark_used()
2077 if (((start >> ord) << ord) == start && len >= (1 << ord)) { in mb_mark_used()
2079 mlen = 1 << ord; in mb_mark_used()
2104 cur = (start >> ord) & ~1U; in mb_mark_used()
2107 mb_clear_bit(cur + 1, buddy); in mb_mark_used()
2124 static void ext4_mb_use_best_found(struct ext4_allocation_context *ac, in ext4_mb_use_best_found() argument
2127 struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb); in ext4_mb_use_best_found()
2130 BUG_ON(ac->ac_b_ex.fe_group != e4b->bd_group); in ext4_mb_use_best_found()
2131 BUG_ON(ac->ac_status == AC_STATUS_FOUND); in ext4_mb_use_best_found()
2133 ac->ac_b_ex.fe_len = min(ac->ac_b_ex.fe_len, ac->ac_g_ex.fe_len); in ext4_mb_use_best_found()
2134 ac->ac_b_ex.fe_logical = ac->ac_g_ex.fe_logical; in ext4_mb_use_best_found()
2135 ret = mb_mark_used(e4b, &ac->ac_b_ex); in ext4_mb_use_best_found()
2139 ac->ac_f_ex = ac->ac_b_ex; in ext4_mb_use_best_found()
2141 ac->ac_status = AC_STATUS_FOUND; in ext4_mb_use_best_found()
2142 ac->ac_tail = ret & 0xffff; in ext4_mb_use_best_found()
2143 ac->ac_buddy = ret >> 16; in ext4_mb_use_best_found()
2152 ac->ac_bitmap_page = e4b->bd_bitmap_page; in ext4_mb_use_best_found()
2153 get_page(ac->ac_bitmap_page); in ext4_mb_use_best_found()
2154 ac->ac_buddy_page = e4b->bd_buddy_page; in ext4_mb_use_best_found()
2155 get_page(ac->ac_buddy_page); in ext4_mb_use_best_found()
2157 if (ac->ac_flags & EXT4_MB_STREAM_ALLOC) { in ext4_mb_use_best_found()
2159 sbi->s_mb_last_group = ac->ac_f_ex.fe_group; in ext4_mb_use_best_found()
2160 sbi->s_mb_last_start = ac->ac_f_ex.fe_start; in ext4_mb_use_best_found()
2168 if (ac->ac_o_ex.fe_len < ac->ac_b_ex.fe_len) in ext4_mb_use_best_found()
2169 ext4_mb_new_preallocation(ac); in ext4_mb_use_best_found()
2173 static void ext4_mb_check_limits(struct ext4_allocation_context *ac, in ext4_mb_check_limits() argument
2177 struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb); in ext4_mb_check_limits()
2178 struct ext4_free_extent *bex = &ac->ac_b_ex; in ext4_mb_check_limits()
2179 struct ext4_free_extent *gex = &ac->ac_g_ex; in ext4_mb_check_limits()
2181 if (ac->ac_status == AC_STATUS_FOUND) in ext4_mb_check_limits()
2186 if (ac->ac_found > sbi->s_mb_max_to_scan && in ext4_mb_check_limits()
2187 !(ac->ac_flags & EXT4_MB_HINT_FIRST)) { in ext4_mb_check_limits()
2188 ac->ac_status = AC_STATUS_BREAK; in ext4_mb_check_limits()
2198 if (finish_group || ac->ac_found > sbi->s_mb_min_to_scan) in ext4_mb_check_limits()
2199 ext4_mb_use_best_found(ac, e4b); in ext4_mb_check_limits()
2226 static void ext4_mb_measure_extent(struct ext4_allocation_context *ac, in ext4_mb_measure_extent() argument
2230 struct ext4_free_extent *bex = &ac->ac_b_ex; in ext4_mb_measure_extent()
2231 struct ext4_free_extent *gex = &ac->ac_g_ex; in ext4_mb_measure_extent()
2234 BUG_ON(ex->fe_len > EXT4_CLUSTERS_PER_GROUP(ac->ac_sb)); in ext4_mb_measure_extent()
2235 BUG_ON(ex->fe_start >= EXT4_CLUSTERS_PER_GROUP(ac->ac_sb)); in ext4_mb_measure_extent()
2236 BUG_ON(ac->ac_status != AC_STATUS_CONTINUE); in ext4_mb_measure_extent()
2238 ac->ac_found++; in ext4_mb_measure_extent()
2239 ac->ac_cX_found[ac->ac_criteria]++; in ext4_mb_measure_extent()
2244 if (unlikely(ac->ac_flags & EXT4_MB_HINT_FIRST)) { in ext4_mb_measure_extent()
2246 ext4_mb_use_best_found(ac, e4b); in ext4_mb_measure_extent()
2255 ext4_mb_use_best_found(ac, e4b); in ext4_mb_measure_extent()
2283 ext4_mb_check_limits(ac, e4b, 0); in ext4_mb_measure_extent()
2287 void ext4_mb_try_best_found(struct ext4_allocation_context *ac, in ext4_mb_try_best_found() argument
2290 struct ext4_free_extent ex = ac->ac_b_ex; in ext4_mb_try_best_found()
2296 err = ext4_mb_load_buddy(ac->ac_sb, group, e4b); in ext4_mb_try_best_found()
2300 ext4_lock_group(ac->ac_sb, group); in ext4_mb_try_best_found()
2307 ac->ac_b_ex = ex; in ext4_mb_try_best_found()
2308 ext4_mb_use_best_found(ac, e4b); in ext4_mb_try_best_found()
2312 ext4_unlock_group(ac->ac_sb, group); in ext4_mb_try_best_found()
2317 int ext4_mb_find_by_goal(struct ext4_allocation_context *ac, in ext4_mb_find_by_goal() argument
2320 ext4_group_t group = ac->ac_g_ex.fe_group; in ext4_mb_find_by_goal()
2323 struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb); in ext4_mb_find_by_goal()
2324 struct ext4_group_info *grp = ext4_get_group_info(ac->ac_sb, group); in ext4_mb_find_by_goal()
2329 if (!(ac->ac_flags & (EXT4_MB_HINT_TRY_GOAL | EXT4_MB_HINT_GOAL_ONLY))) in ext4_mb_find_by_goal()
2334 err = ext4_mb_load_buddy(ac->ac_sb, group, e4b); in ext4_mb_find_by_goal()
2338 ext4_lock_group(ac->ac_sb, group); in ext4_mb_find_by_goal()
2342 max = mb_find_extent(e4b, ac->ac_g_ex.fe_start, in ext4_mb_find_by_goal()
2343 ac->ac_g_ex.fe_len, &ex); in ext4_mb_find_by_goal()
2346 if (max >= ac->ac_g_ex.fe_len && in ext4_mb_find_by_goal()
2347 ac->ac_g_ex.fe_len == EXT4_B2C(sbi, sbi->s_stripe)) { in ext4_mb_find_by_goal()
2350 start = ext4_grp_offs_to_block(ac->ac_sb, &ex); in ext4_mb_find_by_goal()
2353 ac->ac_found++; in ext4_mb_find_by_goal()
2354 ac->ac_b_ex = ex; in ext4_mb_find_by_goal()
2355 ext4_mb_use_best_found(ac, e4b); in ext4_mb_find_by_goal()
2357 } else if (max >= ac->ac_g_ex.fe_len) { in ext4_mb_find_by_goal()
2359 BUG_ON(ex.fe_group != ac->ac_g_ex.fe_group); in ext4_mb_find_by_goal()
2360 BUG_ON(ex.fe_start != ac->ac_g_ex.fe_start); in ext4_mb_find_by_goal()
2361 ac->ac_found++; in ext4_mb_find_by_goal()
2362 ac->ac_b_ex = ex; in ext4_mb_find_by_goal()
2363 ext4_mb_use_best_found(ac, e4b); in ext4_mb_find_by_goal()
2364 } else if (max > 0 && (ac->ac_flags & EXT4_MB_HINT_MERGE)) { in ext4_mb_find_by_goal()
2368 BUG_ON(ex.fe_group != ac->ac_g_ex.fe_group); in ext4_mb_find_by_goal()
2369 BUG_ON(ex.fe_start != ac->ac_g_ex.fe_start); in ext4_mb_find_by_goal()
2370 ac->ac_found++; in ext4_mb_find_by_goal()
2371 ac->ac_b_ex = ex; in ext4_mb_find_by_goal()
2372 ext4_mb_use_best_found(ac, e4b); in ext4_mb_find_by_goal()
2375 ext4_unlock_group(ac->ac_sb, group); in ext4_mb_find_by_goal()
2386 void ext4_mb_simple_scan_group(struct ext4_allocation_context *ac, in ext4_mb_simple_scan_group() argument
2389 struct super_block *sb = ac->ac_sb; in ext4_mb_simple_scan_group()
2396 BUG_ON(ac->ac_2order <= 0); in ext4_mb_simple_scan_group()
2397 for (i = ac->ac_2order; i < MB_NUM_ORDERS(sb); i++) { in ext4_mb_simple_scan_group()
2408 ext4_mark_group_bitmap_corrupted(ac->ac_sb, in ext4_mb_simple_scan_group()
2411 ext4_grp_locked_error(ac->ac_sb, e4b->bd_group, 0, 0, in ext4_mb_simple_scan_group()
2416 ac->ac_found++; in ext4_mb_simple_scan_group()
2417 ac->ac_cX_found[ac->ac_criteria]++; in ext4_mb_simple_scan_group()
2419 ac->ac_b_ex.fe_len = 1 << i; in ext4_mb_simple_scan_group()
2420 ac->ac_b_ex.fe_start = k << i; in ext4_mb_simple_scan_group()
2421 ac->ac_b_ex.fe_group = e4b->bd_group; in ext4_mb_simple_scan_group()
2423 ext4_mb_use_best_found(ac, e4b); in ext4_mb_simple_scan_group()
2425 BUG_ON(ac->ac_f_ex.fe_len != ac->ac_g_ex.fe_len); in ext4_mb_simple_scan_group()
2440 void ext4_mb_complex_scan_group(struct ext4_allocation_context *ac, in ext4_mb_complex_scan_group() argument
2443 struct super_block *sb = ac->ac_sb; in ext4_mb_complex_scan_group()
2455 while (free && ac->ac_status == AC_STATUS_CONTINUE) { in ext4_mb_complex_scan_group()
2473 if (!ext4_mb_cr_expensive(ac->ac_criteria)) { in ext4_mb_complex_scan_group()
2484 if (freelen < ac->ac_g_ex.fe_len) { in ext4_mb_complex_scan_group()
2491 mb_find_extent(e4b, i, ac->ac_g_ex.fe_len, &ex); in ext4_mb_complex_scan_group()
2509 ext4_mb_measure_extent(ac, &ex, e4b); in ext4_mb_complex_scan_group()
2515 ext4_mb_check_limits(ac, e4b, 1); in ext4_mb_complex_scan_group()
2523 void ext4_mb_scan_aligned(struct ext4_allocation_context *ac, in ext4_mb_scan_aligned() argument
2526 struct super_block *sb = ac->ac_sb; in ext4_mb_scan_aligned()
2540 a = first_group_block + sbi->s_stripe - 1; in ext4_mb_scan_aligned()
2550 ac->ac_found++; in ext4_mb_scan_aligned()
2551 ac->ac_cX_found[ac->ac_criteria]++; in ext4_mb_scan_aligned()
2553 ac->ac_b_ex = ex; in ext4_mb_scan_aligned()
2554 ext4_mb_use_best_found(ac, e4b); in ext4_mb_scan_aligned()
2564 * Returns either 1 or 0 indicating that the group is either suitable
2567 static bool ext4_mb_good_group(struct ext4_allocation_context *ac, in ext4_mb_good_group() argument
2571 int flex_size = ext4_flex_bg_size(EXT4_SB(ac->ac_sb)); in ext4_mb_good_group()
2572 struct ext4_group_info *grp = ext4_get_group_info(ac->ac_sb, group); in ext4_mb_good_group()
2589 BUG_ON(ac->ac_2order == 0); in ext4_mb_good_group()
2592 if ((ac->ac_flags & EXT4_MB_HINT_DATA) && in ext4_mb_good_group()
2597 if (free < ac->ac_g_ex.fe_len) in ext4_mb_good_group()
2600 if (ac->ac_2order >= MB_NUM_ORDERS(ac->ac_sb)) in ext4_mb_good_group()
2603 if (grp->bb_largest_free_order < ac->ac_2order) in ext4_mb_good_group()
2609 if ((free / fragments) >= ac->ac_g_ex.fe_len) in ext4_mb_good_group()
2613 if (free >= ac->ac_g_ex.fe_len) in ext4_mb_good_group()
2636 static int ext4_mb_good_group_nolock(struct ext4_allocation_context *ac, in ext4_mb_good_group_nolock() argument
2639 struct ext4_group_info *grp = ext4_get_group_info(ac->ac_sb, group); in ext4_mb_good_group_nolock()
2640 struct super_block *sb = ac->ac_sb; in ext4_mb_good_group_nolock()
2642 bool should_lock = ac->ac_flags & EXT4_MB_STRICT_CHECK; in ext4_mb_good_group_nolock()
2649 atomic64_inc(&sbi->s_bal_cX_groups_considered[ac->ac_criteria]); in ext4_mb_good_group_nolock()
2662 if (cr < CR_ANY_FREE && free < ac->ac_g_ex.fe_len) in ext4_mb_good_group_nolock()
2688 ((group & ((1 << sbi->s_log_groups_per_flex) - 1)) != 0)) && in ext4_mb_good_group_nolock()
2701 ret = ext4_mb_good_group(ac, group, cr); in ext4_mb_good_group_nolock()
2785 ext4_mb_regular_allocator(struct ext4_allocation_context *ac) in ext4_mb_regular_allocator() argument
2796 sb = ac->ac_sb; in ext4_mb_regular_allocator()
2800 if (!(ext4_test_inode_flag(ac->ac_inode, EXT4_INODE_EXTENTS))) in ext4_mb_regular_allocator()
2803 BUG_ON(ac->ac_status == AC_STATUS_FOUND); in ext4_mb_regular_allocator()
2806 err = ext4_mb_find_by_goal(ac, &e4b); in ext4_mb_regular_allocator()
2807 if (err || ac->ac_status == AC_STATUS_FOUND) in ext4_mb_regular_allocator()
2810 if (unlikely(ac->ac_flags & EXT4_MB_HINT_GOAL_ONLY)) in ext4_mb_regular_allocator()
2814 * ac->ac_2order is set only if the fe_len is a power of 2 in ext4_mb_regular_allocator()
2815 * if ac->ac_2order is set we also set criteria to CR_POWER2_ALIGNED in ext4_mb_regular_allocator()
2818 i = fls(ac->ac_g_ex.fe_len); in ext4_mb_regular_allocator()
2819 ac->ac_2order = 0; in ext4_mb_regular_allocator()
2828 if (is_power_of_2(ac->ac_g_ex.fe_len)) in ext4_mb_regular_allocator()
2829 ac->ac_2order = array_index_nospec(i - 1, in ext4_mb_regular_allocator()
2834 if (ac->ac_flags & EXT4_MB_STREAM_ALLOC) { in ext4_mb_regular_allocator()
2837 ac->ac_g_ex.fe_group = sbi->s_mb_last_group; in ext4_mb_regular_allocator()
2838 ac->ac_g_ex.fe_start = sbi->s_mb_last_start; in ext4_mb_regular_allocator()
2847 if (ac->ac_2order) in ext4_mb_regular_allocator()
2850 for (; cr < EXT4_MB_NUM_CRS && ac->ac_status == AC_STATUS_CONTINUE; cr++) { in ext4_mb_regular_allocator()
2851 ac->ac_criteria = cr; in ext4_mb_regular_allocator()
2856 group = ac->ac_g_ex.fe_group; in ext4_mb_regular_allocator()
2857 ac->ac_groups_linear_remaining = sbi->s_mb_max_linear_groups; in ext4_mb_regular_allocator()
2861 ext4_mb_choose_next_group(ac, &new_cr, &group, ngroups)) { in ext4_mb_regular_allocator()
2881 nr = 1 << sbi->s_log_groups_per_flex; in ext4_mb_regular_allocator()
2882 nr -= group & (nr - 1); in ext4_mb_regular_allocator()
2890 ret = ext4_mb_good_group_nolock(ac, group, cr); in ext4_mb_regular_allocator()
2907 ret = ext4_mb_good_group(ac, group, cr); in ext4_mb_regular_allocator()
2914 ac->ac_groups_scanned++; in ext4_mb_regular_allocator()
2916 ext4_mb_simple_scan_group(ac, &e4b); in ext4_mb_regular_allocator()
2919 !(ac->ac_g_ex.fe_len % in ext4_mb_regular_allocator()
2925 ext4_mb_scan_aligned(ac, &e4b); in ext4_mb_regular_allocator()
2927 if (ac->ac_status == AC_STATUS_CONTINUE) in ext4_mb_regular_allocator()
2928 ext4_mb_complex_scan_group(ac, &e4b); in ext4_mb_regular_allocator()
2934 if (ac->ac_status != AC_STATUS_CONTINUE) in ext4_mb_regular_allocator()
2941 if (i == ngroups && ac->ac_criteria == CR_BEST_AVAIL_LEN) in ext4_mb_regular_allocator()
2944 ac->ac_g_ex.fe_len = ac->ac_orig_goal_len; in ext4_mb_regular_allocator()
2947 if (ac->ac_b_ex.fe_len > 0 && ac->ac_status != AC_STATUS_FOUND && in ext4_mb_regular_allocator()
2948 !(ac->ac_flags & EXT4_MB_HINT_FIRST)) { in ext4_mb_regular_allocator()
2953 ext4_mb_try_best_found(ac, &e4b); in ext4_mb_regular_allocator()
2954 if (ac->ac_status != AC_STATUS_FOUND) { in ext4_mb_regular_allocator()
2962 ac->ac_b_ex.fe_group, ac->ac_b_ex.fe_start, in ext4_mb_regular_allocator()
2963 ac->ac_b_ex.fe_len, lost); in ext4_mb_regular_allocator()
2965 ac->ac_b_ex.fe_group = 0; in ext4_mb_regular_allocator()
2966 ac->ac_b_ex.fe_start = 0; in ext4_mb_regular_allocator()
2967 ac->ac_b_ex.fe_len = 0; in ext4_mb_regular_allocator()
2968 ac->ac_status = AC_STATUS_CONTINUE; in ext4_mb_regular_allocator()
2969 ac->ac_flags |= EXT4_MB_HINT_FIRST; in ext4_mb_regular_allocator()
2975 if (sbi->s_mb_stats && ac->ac_status == AC_STATUS_FOUND) in ext4_mb_regular_allocator()
2976 atomic64_inc(&sbi->s_bal_cX_hits[ac->ac_criteria]); in ext4_mb_regular_allocator()
2978 if (!err && ac->ac_status != AC_STATUS_FOUND && first_err) in ext4_mb_regular_allocator()
2982 ac->ac_b_ex.fe_len, ac->ac_o_ex.fe_len, ac->ac_status, in ext4_mb_regular_allocator()
2983 ac->ac_flags, cr, err); in ext4_mb_regular_allocator()
2998 group = *pos + 1; in ext4_mb_seq_groups_start()
3010 group = *pos + 1; in ext4_mb_seq_groups_next()
3033 " 2^0 2^1 2^2 2^3 2^4 2^5 2^6 " in ext4_mb_seq_groups_show()
3049 buddy_loaded = 1; in ext4_mb_seq_groups_show()
3060 seq_printf(seq, " %-5u", i <= blocksize_bits + 1 ? in ext4_mb_seq_groups_show()
3088 "\tTo enable, please write \"1\" to sysfs file mb_stats.\n"); in ext4_seq_mb_stats_show()
3193 position = *pos + 1; in ext4_mb_seq_structs_summary_start()
3205 position = *pos + 1; in ext4_mb_seq_structs_summary_next()
3236 test_opt2(sb, MB_OPTIMIZE_SCAN) ? 1 : 0); in ext4_mb_seq_structs_summary_show()
3281 size = (ngroups + EXT4_DESC_PER_BLOCK(sb) - 1) >> in ext4_mb_alloc_groupinfo()
3338 i = group & (EXT4_DESC_PER_BLOCK(sb) - 1); in ext4_mb_add_groupinfo()
3366 meta_group_info[i]->bb_largest_free_order = -1; /* uninit */ in ext4_mb_add_groupinfo()
3367 meta_group_info[i]->bb_avg_fragment_size_order = -1; /* uninit */ in ext4_mb_add_groupinfo()
3432 sbi->s_mb_prefetch = min_t(uint, 1 << sbi->s_es->s_log_groups_per_flex, in ext4_mb_init_backend()
3564 fd->efd_start_cluster + fd->efd_count - 1, 1); in ext4_discard_work()
3605 i = 1; in ext4_mb_init()
3607 offset_incr = 1 << (sb->s_blocksize_bits - 1); in ext4_mb_init()
3613 offset_incr = offset_incr >> 1; in ext4_mb_init()
3614 max = max >> 1; in ext4_mb_init()
3658 INIT_LIST_HEAD(&sbi->s_freed_data_list[1]); in ext4_mb_init()
3674 * is 1 megabyte, then group preallocation size becomes half a in ext4_mb_init()
3679 * size is 256k, and 32 megs when the cluster size is 1 meg, in ext4_mb_init()
3685 * If there is a s_stripe > 1, then we set the s_mb_group_prealloc in ext4_mb_init()
3692 if (sbi->s_stripe > 1) { in ext4_mb_init()
3787 EXT4_DESC_PER_BLOCK(sb) - 1) >> in ext4_mb_release()
3896 mb_debug(sb, "freed %d blocks in 1 structures\n", count); in ext4_free_data_in_buddy()
3908 struct list_head *s_freed_head = &sbi->s_freed_data_list[commit_tid & 1]; in ext4_process_freed_data()
4076 * Check quota and mark chosen space (ac->ac_b_ex) non-free in bitmaps
4080 ext4_mb_mark_diskspace_used(struct ext4_allocation_context *ac, in ext4_mb_mark_diskspace_used() argument
4091 BUG_ON(ac->ac_status != AC_STATUS_FOUND); in ext4_mb_mark_diskspace_used()
4092 BUG_ON(ac->ac_b_ex.fe_len <= 0); in ext4_mb_mark_diskspace_used()
4094 sb = ac->ac_sb; in ext4_mb_mark_diskspace_used()
4097 gdp = ext4_get_group_desc(sb, ac->ac_b_ex.fe_group, NULL); in ext4_mb_mark_diskspace_used()
4100 ext4_debug("using block group %u(%d)\n", ac->ac_b_ex.fe_group, in ext4_mb_mark_diskspace_used()
4103 block = ext4_grp_offs_to_block(sb, &ac->ac_b_ex); in ext4_mb_mark_diskspace_used()
4104 len = EXT4_C2B(sbi, ac->ac_b_ex.fe_len); in ext4_mb_mark_diskspace_used()
4105 if (!ext4_inode_block_valid(ac->ac_inode, block, len)) { in ext4_mb_mark_diskspace_used()
4113 ac->ac_b_ex.fe_group, in ext4_mb_mark_diskspace_used()
4114 ac->ac_b_ex.fe_start, in ext4_mb_mark_diskspace_used()
4115 ac->ac_b_ex.fe_len, in ext4_mb_mark_diskspace_used()
4125 err = ext4_mb_mark_context(handle, sb, true, ac->ac_b_ex.fe_group, in ext4_mb_mark_diskspace_used()
4126 ac->ac_b_ex.fe_start, ac->ac_b_ex.fe_len, in ext4_mb_mark_diskspace_used()
4133 BUG_ON(changed != ac->ac_b_ex.fe_len); in ext4_mb_mark_diskspace_used()
4135 percpu_counter_sub(&sbi->s_freeclusters_counter, ac->ac_b_ex.fe_len); in ext4_mb_mark_diskspace_used()
4139 if (!(ac->ac_flags & EXT4_MB_DELALLOC_RESERVED)) in ext4_mb_mark_diskspace_used()
4205 static void ext4_mb_normalize_group_request(struct ext4_allocation_context *ac) in ext4_mb_normalize_group_request() argument
4207 struct super_block *sb = ac->ac_sb; in ext4_mb_normalize_group_request()
4208 struct ext4_locality_group *lg = ac->ac_lg; in ext4_mb_normalize_group_request()
4211 ac->ac_g_ex.fe_len = EXT4_SB(sb)->s_mb_group_prealloc; in ext4_mb_normalize_group_request()
4212 mb_debug(sb, "goal %u blocks for locality group\n", ac->ac_g_ex.fe_len); in ext4_mb_normalize_group_request()
4234 ext4_mb_pa_assert_overlap(struct ext4_allocation_context *ac, in ext4_mb_pa_assert_overlap() argument
4237 struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb); in ext4_mb_pa_assert_overlap()
4238 struct ext4_inode_info *ei = EXT4_I(ac->ac_inode); in ext4_mb_pa_assert_overlap()
4261 * Given an allocation context "ac" and a range "start", "end", check
4266 * ac allocation context
4271 ext4_mb_pa_adjust_overlap(struct ext4_allocation_context *ac, in ext4_mb_pa_adjust_overlap() argument
4274 struct ext4_inode_info *ei = EXT4_I(ac->ac_inode); in ext4_mb_pa_adjust_overlap()
4275 struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb); in ext4_mb_pa_adjust_overlap()
4278 ext4_lblk_t new_start, tmp_pa_start, right_pa_start = -1; in ext4_mb_pa_adjust_overlap()
4279 loff_t new_end, tmp_pa_end, left_pa_end = -1; in ext4_mb_pa_adjust_overlap()
4291 /* Step 1: find any one immediate neighboring PA of the normalized range */ in ext4_mb_pa_adjust_overlap()
4293 iter = ext4_mb_pa_rb_next_iter(ac->ac_o_ex.fe_logical, in ext4_mb_pa_adjust_overlap()
4303 BUG_ON(!(ac->ac_o_ex.fe_logical >= tmp_pa_end || in ext4_mb_pa_adjust_overlap()
4304 ac->ac_o_ex.fe_logical < tmp_pa_start)); in ext4_mb_pa_adjust_overlap()
4313 if (tmp_pa->pa_lstart < ac->ac_o_ex.fe_logical) { in ext4_mb_pa_adjust_overlap()
4379 BUG_ON(left_pa_end > ac->ac_o_ex.fe_logical); in ext4_mb_pa_adjust_overlap()
4384 BUG_ON(right_pa_start <= ac->ac_o_ex.fe_logical); in ext4_mb_pa_adjust_overlap()
4400 ext4_mb_pa_assert_overlap(ac, new_start, new_end); in ext4_mb_pa_adjust_overlap()
4411 ext4_mb_normalize_request(struct ext4_allocation_context *ac, in ext4_mb_normalize_request() argument
4414 struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb); in ext4_mb_normalize_request()
4423 if (!(ac->ac_flags & EXT4_MB_HINT_DATA)) in ext4_mb_normalize_request()
4427 if (unlikely(ac->ac_flags & EXT4_MB_HINT_GOAL_ONLY)) in ext4_mb_normalize_request()
4432 if (ac->ac_flags & EXT4_MB_HINT_NOPREALLOC) in ext4_mb_normalize_request()
4435 if (ac->ac_flags & EXT4_MB_HINT_GROUP_ALLOC) { in ext4_mb_normalize_request()
4436 ext4_mb_normalize_group_request(ac); in ext4_mb_normalize_request()
4440 bsbits = ac->ac_sb->s_blocksize_bits; in ext4_mb_normalize_request()
4444 size = extent_logical_end(sbi, &ac->ac_o_ex); in ext4_mb_normalize_request()
4446 if (size < i_size_read(ac->ac_inode)) in ext4_mb_normalize_request()
4447 size = i_size_read(ac->ac_inode); in ext4_mb_normalize_request()
4474 start_off = ((loff_t)ac->ac_o_ex.fe_logical >> in ext4_mb_normalize_request()
4478 start_off = ((loff_t)ac->ac_o_ex.fe_logical >> in ext4_mb_normalize_request()
4481 } else if (NRL_CHECK_SIZE(EXT4_C2B(sbi, ac->ac_o_ex.fe_len), in ext4_mb_normalize_request()
4483 start_off = ((loff_t)ac->ac_o_ex.fe_logical >> in ext4_mb_normalize_request()
4487 start_off = (loff_t) ac->ac_o_ex.fe_logical << bsbits; in ext4_mb_normalize_request()
4489 ac->ac_o_ex.fe_len) << bsbits; in ext4_mb_normalize_request()
4500 start = max(start, rounddown(ac->ac_o_ex.fe_logical, in ext4_mb_normalize_request()
4501 (ext4_lblk_t)EXT4_BLOCKS_PER_GROUP(ac->ac_sb))); in ext4_mb_normalize_request()
4509 size -= ar->lleft + 1 - start; in ext4_mb_normalize_request()
4510 start = ar->lleft + 1; in ext4_mb_normalize_request()
4512 if (ar->pright && start + size - 1 >= ar->lright) in ext4_mb_normalize_request()
4519 if (size > EXT4_BLOCKS_PER_GROUP(ac->ac_sb)) in ext4_mb_normalize_request()
4520 size = EXT4_BLOCKS_PER_GROUP(ac->ac_sb); in ext4_mb_normalize_request()
4524 ext4_mb_pa_adjust_overlap(ac, &start, &end); in ext4_mb_normalize_request()
4532 * ac->ac_o_ex.fe_logical & fe_len should always lie within "start" and in ext4_mb_normalize_request()
4543 if (start + size <= ac->ac_o_ex.fe_logical || in ext4_mb_normalize_request()
4544 start > ac->ac_o_ex.fe_logical) { in ext4_mb_normalize_request()
4545 ext4_msg(ac->ac_sb, KERN_ERR, in ext4_mb_normalize_request()
4548 (unsigned long) ac->ac_o_ex.fe_logical); in ext4_mb_normalize_request()
4551 BUG_ON(size <= 0 || size > EXT4_BLOCKS_PER_GROUP(ac->ac_sb)); in ext4_mb_normalize_request()
4557 ac->ac_g_ex.fe_logical = start; in ext4_mb_normalize_request()
4558 ac->ac_g_ex.fe_len = EXT4_NUM_B2C(sbi, size); in ext4_mb_normalize_request()
4559 ac->ac_orig_goal_len = ac->ac_g_ex.fe_len; in ext4_mb_normalize_request()
4566 ext4_get_group_no_and_offset(ac->ac_sb, ar->pright - size, in ext4_mb_normalize_request()
4567 &ac->ac_g_ex.fe_group, in ext4_mb_normalize_request()
4568 &ac->ac_g_ex.fe_start); in ext4_mb_normalize_request()
4569 ac->ac_flags |= EXT4_MB_HINT_TRY_GOAL; in ext4_mb_normalize_request()
4571 if (ar->pleft && (ar->lleft + 1 == start) && in ext4_mb_normalize_request()
4572 ar->pleft + 1 < ext4_blocks_count(es)) { in ext4_mb_normalize_request()
4574 ext4_get_group_no_and_offset(ac->ac_sb, ar->pleft + 1, in ext4_mb_normalize_request()
4575 &ac->ac_g_ex.fe_group, in ext4_mb_normalize_request()
4576 &ac->ac_g_ex.fe_start); in ext4_mb_normalize_request()
4577 ac->ac_flags |= EXT4_MB_HINT_TRY_GOAL; in ext4_mb_normalize_request()
4580 mb_debug(ac->ac_sb, "goal: %lld(was %lld) blocks at %u\n", size, in ext4_mb_normalize_request()
4584 static void ext4_mb_collect_stats(struct ext4_allocation_context *ac) in ext4_mb_collect_stats() argument
4586 struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb); in ext4_mb_collect_stats()
4588 if (sbi->s_mb_stats && ac->ac_g_ex.fe_len >= 1) { in ext4_mb_collect_stats()
4590 atomic_add(ac->ac_b_ex.fe_len, &sbi->s_bal_allocated); in ext4_mb_collect_stats()
4591 if (ac->ac_b_ex.fe_len >= ac->ac_o_ex.fe_len) in ext4_mb_collect_stats()
4594 atomic_add(ac->ac_found, &sbi->s_bal_ex_scanned); in ext4_mb_collect_stats()
4596 atomic_add(ac->ac_cX_found[i], &sbi->s_bal_cX_ex_scanned[i]); in ext4_mb_collect_stats()
4599 atomic_add(ac->ac_groups_scanned, &sbi->s_bal_groups_scanned); in ext4_mb_collect_stats()
4600 if (ac->ac_g_ex.fe_start == ac->ac_b_ex.fe_start && in ext4_mb_collect_stats()
4601 ac->ac_g_ex.fe_group == ac->ac_b_ex.fe_group) in ext4_mb_collect_stats()
4604 if (ac->ac_f_ex.fe_len == ac->ac_orig_goal_len) in ext4_mb_collect_stats()
4607 if (ac->ac_found > sbi->s_mb_max_to_scan) in ext4_mb_collect_stats()
4611 if (ac->ac_op == EXT4_MB_HISTORY_ALLOC) in ext4_mb_collect_stats()
4612 trace_ext4_mballoc_alloc(ac); in ext4_mb_collect_stats()
4614 trace_ext4_mballoc_prealloc(ac); in ext4_mb_collect_stats()
4621 * zeroed out ac->ac_b_ex.fe_len, so group_pa->pa_free is not changed.
4623 static void ext4_discard_allocated_blocks(struct ext4_allocation_context *ac) in ext4_discard_allocated_blocks() argument
4625 struct ext4_prealloc_space *pa = ac->ac_pa; in ext4_discard_allocated_blocks()
4630 if (ac->ac_f_ex.fe_len == 0) in ext4_discard_allocated_blocks()
4632 err = ext4_mb_load_buddy(ac->ac_sb, ac->ac_f_ex.fe_group, &e4b); in ext4_discard_allocated_blocks()
4641 ext4_lock_group(ac->ac_sb, ac->ac_f_ex.fe_group); in ext4_discard_allocated_blocks()
4642 mb_free_blocks(ac->ac_inode, &e4b, ac->ac_f_ex.fe_start, in ext4_discard_allocated_blocks()
4643 ac->ac_f_ex.fe_len); in ext4_discard_allocated_blocks()
4644 ext4_unlock_group(ac->ac_sb, ac->ac_f_ex.fe_group); in ext4_discard_allocated_blocks()
4650 pa->pa_free += ac->ac_b_ex.fe_len; in ext4_discard_allocated_blocks()
4658 static void ext4_mb_use_inode_pa(struct ext4_allocation_context *ac, in ext4_mb_use_inode_pa() argument
4661 struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb); in ext4_mb_use_inode_pa()
4667 start = pa->pa_pstart + (ac->ac_o_ex.fe_logical - pa->pa_lstart); in ext4_mb_use_inode_pa()
4669 start + EXT4_C2B(sbi, ac->ac_o_ex.fe_len)); in ext4_mb_use_inode_pa()
4671 ext4_get_group_no_and_offset(ac->ac_sb, start, &ac->ac_b_ex.fe_group, in ext4_mb_use_inode_pa()
4672 &ac->ac_b_ex.fe_start); in ext4_mb_use_inode_pa()
4673 ac->ac_b_ex.fe_len = len; in ext4_mb_use_inode_pa()
4674 ac->ac_status = AC_STATUS_FOUND; in ext4_mb_use_inode_pa()
4675 ac->ac_pa = pa; in ext4_mb_use_inode_pa()
4680 BUG_ON(ac->ac_b_ex.fe_len <= 0); in ext4_mb_use_inode_pa()
4683 mb_debug(ac->ac_sb, "use %llu/%d from inode pa %p\n", start, len, pa); in ext4_mb_use_inode_pa()
4689 static void ext4_mb_use_group_pa(struct ext4_allocation_context *ac, in ext4_mb_use_group_pa() argument
4692 unsigned int len = ac->ac_o_ex.fe_len; in ext4_mb_use_group_pa()
4694 ext4_get_group_no_and_offset(ac->ac_sb, pa->pa_pstart, in ext4_mb_use_group_pa()
4695 &ac->ac_b_ex.fe_group, in ext4_mb_use_group_pa()
4696 &ac->ac_b_ex.fe_start); in ext4_mb_use_group_pa()
4697 ac->ac_b_ex.fe_len = len; in ext4_mb_use_group_pa()
4698 ac->ac_status = AC_STATUS_FOUND; in ext4_mb_use_group_pa()
4699 ac->ac_pa = pa; in ext4_mb_use_group_pa()
4707 mb_debug(ac->ac_sb, "use %u/%u from group pa %p\n", in ext4_mb_use_group_pa()
4744 ext4_mb_pa_goal_check(struct ext4_allocation_context *ac, in ext4_mb_pa_goal_check() argument
4747 struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb); in ext4_mb_pa_goal_check()
4750 if (likely(!(ac->ac_flags & EXT4_MB_HINT_GOAL_ONLY))) in ext4_mb_pa_goal_check()
4760 (ac->ac_g_ex.fe_logical - pa->pa_lstart); in ext4_mb_pa_goal_check()
4761 if (ext4_grp_offs_to_block(ac->ac_sb, &ac->ac_g_ex) != start) in ext4_mb_pa_goal_check()
4764 if (ac->ac_g_ex.fe_len > pa->pa_len - in ext4_mb_pa_goal_check()
4765 EXT4_B2C(sbi, ac->ac_g_ex.fe_logical - pa->pa_lstart)) in ext4_mb_pa_goal_check()
4775 ext4_mb_use_preallocated(struct ext4_allocation_context *ac) in ext4_mb_use_preallocated() argument
4777 struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb); in ext4_mb_use_preallocated()
4779 struct ext4_inode_info *ei = EXT4_I(ac->ac_inode); in ext4_mb_use_preallocated()
4786 if (!(ac->ac_flags & EXT4_MB_HINT_DATA)) in ext4_mb_use_preallocated()
4803 * Step 1: Find a pa with logical start immediately adjacent to the in ext4_mb_use_preallocated()
4809 iter = ext4_mb_pa_rb_next_iter(ac->ac_o_ex.fe_logical, in ext4_mb_use_preallocated()
4820 if (tmp_pa->pa_lstart > ac->ac_o_ex.fe_logical) { in ext4_mb_use_preallocated()
4837 BUG_ON(!(tmp_pa && tmp_pa->pa_lstart <= ac->ac_o_ex.fe_logical)); in ext4_mb_use_preallocated()
4869 BUG_ON(!(tmp_pa && tmp_pa->pa_lstart <= ac->ac_o_ex.fe_logical)); in ext4_mb_use_preallocated()
4870 BUG_ON(tmp_pa->pa_deleted == 1); in ext4_mb_use_preallocated()
4877 if (ac->ac_o_ex.fe_logical >= pa_logical_end(sbi, tmp_pa)) { in ext4_mb_use_preallocated()
4883 if (!(ext4_test_inode_flag(ac->ac_inode, EXT4_INODE_EXTENTS)) && in ext4_mb_use_preallocated()
4894 if (tmp_pa->pa_free && likely(ext4_mb_pa_goal_check(ac, tmp_pa))) { in ext4_mb_use_preallocated()
4896 ext4_mb_use_inode_pa(ac, tmp_pa); in ext4_mb_use_preallocated()
4906 * 1. When a new inode pa is added to rbtree it must have in ext4_mb_use_preallocated()
4935 if (!(ac->ac_flags & EXT4_MB_HINT_GROUP_ALLOC)) in ext4_mb_use_preallocated()
4939 lg = ac->ac_lg; in ext4_mb_use_preallocated()
4942 order = fls(ac->ac_o_ex.fe_len) - 1; in ext4_mb_use_preallocated()
4943 if (order > PREALLOC_TB_SIZE - 1) in ext4_mb_use_preallocated()
4945 order = PREALLOC_TB_SIZE - 1; in ext4_mb_use_preallocated()
4947 goal_block = ext4_grp_offs_to_block(ac->ac_sb, &ac->ac_g_ex); in ext4_mb_use_preallocated()
4958 tmp_pa->pa_free >= ac->ac_o_ex.fe_len) { in ext4_mb_use_preallocated()
4968 ext4_mb_use_group_pa(ac, cpa); in ext4_mb_use_preallocated()
5030 pa->pa_deleted = 1; in ext4_mb_mark_pa_deleted()
5058 static void ext4_mb_put_pa(struct ext4_allocation_context *ac, in ext4_mb_put_pa() argument
5063 struct ext4_inode_info *ei = EXT4_I(ac->ac_inode); in ext4_mb_put_pa()
5072 if (pa->pa_deleted == 1) { in ext4_mb_put_pa()
5150 ext4_mb_new_inode_pa(struct ext4_allocation_context *ac) in ext4_mb_new_inode_pa() argument
5152 struct super_block *sb = ac->ac_sb; in ext4_mb_new_inode_pa()
5159 BUG_ON(ac->ac_o_ex.fe_len >= ac->ac_b_ex.fe_len); in ext4_mb_new_inode_pa()
5160 BUG_ON(ac->ac_status != AC_STATUS_FOUND); in ext4_mb_new_inode_pa()
5161 BUG_ON(!S_ISREG(ac->ac_inode->i_mode)); in ext4_mb_new_inode_pa()
5162 BUG_ON(ac->ac_pa == NULL); in ext4_mb_new_inode_pa()
5164 pa = ac->ac_pa; in ext4_mb_new_inode_pa()
5166 if (ac->ac_b_ex.fe_len < ac->ac_orig_goal_len) { in ext4_mb_new_inode_pa()
5168 .fe_logical = ac->ac_g_ex.fe_logical, in ext4_mb_new_inode_pa()
5169 .fe_len = ac->ac_orig_goal_len, in ext4_mb_new_inode_pa()
5176 BUG_ON(ac->ac_g_ex.fe_logical > ac->ac_o_ex.fe_logical); in ext4_mb_new_inode_pa()
5177 BUG_ON(ac->ac_g_ex.fe_len < ac->ac_o_ex.fe_len); in ext4_mb_new_inode_pa()
5184 * 1. Check if best ex can be kept at end of goal (before in ext4_mb_new_inode_pa()
5190 ex.fe_len = ac->ac_b_ex.fe_len; in ext4_mb_new_inode_pa()
5193 if (ac->ac_o_ex.fe_logical >= ex.fe_logical) in ext4_mb_new_inode_pa()
5196 ex.fe_logical = ac->ac_g_ex.fe_logical; in ext4_mb_new_inode_pa()
5197 if (ac->ac_o_ex.fe_logical < extent_logical_end(sbi, &ex)) in ext4_mb_new_inode_pa()
5200 ex.fe_logical = ac->ac_o_ex.fe_logical; in ext4_mb_new_inode_pa()
5202 ac->ac_b_ex.fe_logical = ex.fe_logical; in ext4_mb_new_inode_pa()
5204 BUG_ON(ac->ac_o_ex.fe_logical < ac->ac_b_ex.fe_logical); in ext4_mb_new_inode_pa()
5205 BUG_ON(ac->ac_o_ex.fe_len > ac->ac_b_ex.fe_len); in ext4_mb_new_inode_pa()
5209 pa->pa_lstart = ac->ac_b_ex.fe_logical; in ext4_mb_new_inode_pa()
5210 pa->pa_pstart = ext4_grp_offs_to_block(sb, &ac->ac_b_ex); in ext4_mb_new_inode_pa()
5211 pa->pa_len = ac->ac_b_ex.fe_len; in ext4_mb_new_inode_pa()
5220 trace_ext4_mb_new_inode_pa(ac, pa); in ext4_mb_new_inode_pa()
5223 ext4_mb_use_inode_pa(ac, pa); in ext4_mb_new_inode_pa()
5225 ei = EXT4_I(ac->ac_inode); in ext4_mb_new_inode_pa()
5226 grp = ext4_get_group_info(sb, ac->ac_b_ex.fe_group); in ext4_mb_new_inode_pa()
5231 pa->pa_inode = ac->ac_inode; in ext4_mb_new_inode_pa()
5245 ext4_mb_new_group_pa(struct ext4_allocation_context *ac) in ext4_mb_new_group_pa() argument
5247 struct super_block *sb = ac->ac_sb; in ext4_mb_new_group_pa()
5253 BUG_ON(ac->ac_o_ex.fe_len >= ac->ac_b_ex.fe_len); in ext4_mb_new_group_pa()
5254 BUG_ON(ac->ac_status != AC_STATUS_FOUND); in ext4_mb_new_group_pa()
5255 BUG_ON(!S_ISREG(ac->ac_inode->i_mode)); in ext4_mb_new_group_pa()
5256 BUG_ON(ac->ac_pa == NULL); in ext4_mb_new_group_pa()
5258 pa = ac->ac_pa; in ext4_mb_new_group_pa()
5260 pa->pa_pstart = ext4_grp_offs_to_block(sb, &ac->ac_b_ex); in ext4_mb_new_group_pa()
5262 pa->pa_len = ac->ac_b_ex.fe_len; in ext4_mb_new_group_pa()
5272 trace_ext4_mb_new_group_pa(ac, pa); in ext4_mb_new_group_pa()
5274 ext4_mb_use_group_pa(ac, pa); in ext4_mb_new_group_pa()
5277 grp = ext4_get_group_info(sb, ac->ac_b_ex.fe_group); in ext4_mb_new_group_pa()
5280 lg = ac->ac_lg; in ext4_mb_new_group_pa()
5294 static void ext4_mb_new_preallocation(struct ext4_allocation_context *ac) in ext4_mb_new_preallocation() argument
5296 if (ac->ac_flags & EXT4_MB_HINT_GROUP_ALLOC) in ext4_mb_new_preallocation()
5297 ext4_mb_new_group_pa(ac); in ext4_mb_new_preallocation()
5299 ext4_mb_new_inode_pa(ac); in ext4_mb_new_preallocation()
5344 bit = next + 1; in ext4_mb_release_inode_pa()
5388 * 1) ENOSPC
5390 * 1) how many requested
5434 *busy = 1; in ext4_mb_discard_group_preallocations()
5541 WARN_ON(1); in ext4_discard_preallocations()
5609 static int ext4_mb_pa_alloc(struct ext4_allocation_context *ac) in ext4_mb_pa_alloc() argument
5617 atomic_set(&pa->pa_count, 1); in ext4_mb_pa_alloc()
5618 ac->ac_pa = pa; in ext4_mb_pa_alloc()
5622 static void ext4_mb_pa_put_free(struct ext4_allocation_context *ac) in ext4_mb_pa_put_free() argument
5624 struct ext4_prealloc_space *pa = ac->ac_pa; in ext4_mb_pa_put_free()
5627 ac->ac_pa = NULL; in ext4_mb_pa_put_free()
5634 pa->pa_deleted = 1; in ext4_mb_pa_put_free()
5673 static void ext4_mb_show_ac(struct ext4_allocation_context *ac) in ext4_mb_show_ac() argument
5675 struct super_block *sb = ac->ac_sb; in ext4_mb_show_ac()
5683 ac->ac_status, ac->ac_flags); in ext4_mb_show_ac()
5687 (unsigned long)ac->ac_o_ex.fe_group, in ext4_mb_show_ac()
5688 (unsigned long)ac->ac_o_ex.fe_start, in ext4_mb_show_ac()
5689 (unsigned long)ac->ac_o_ex.fe_len, in ext4_mb_show_ac()
5690 (unsigned long)ac->ac_o_ex.fe_logical, in ext4_mb_show_ac()
5691 (unsigned long)ac->ac_g_ex.fe_group, in ext4_mb_show_ac()
5692 (unsigned long)ac->ac_g_ex.fe_start, in ext4_mb_show_ac()
5693 (unsigned long)ac->ac_g_ex.fe_len, in ext4_mb_show_ac()
5694 (unsigned long)ac->ac_g_ex.fe_logical, in ext4_mb_show_ac()
5695 (unsigned long)ac->ac_b_ex.fe_group, in ext4_mb_show_ac()
5696 (unsigned long)ac->ac_b_ex.fe_start, in ext4_mb_show_ac()
5697 (unsigned long)ac->ac_b_ex.fe_len, in ext4_mb_show_ac()
5698 (unsigned long)ac->ac_b_ex.fe_logical, in ext4_mb_show_ac()
5699 (int)ac->ac_criteria); in ext4_mb_show_ac()
5700 mb_debug(sb, "%u found", ac->ac_found); in ext4_mb_show_ac()
5701 mb_debug(sb, "used pa: %s, ", ac->ac_pa ? "yes" : "no"); in ext4_mb_show_ac()
5702 if (ac->ac_pa) in ext4_mb_show_ac()
5703 mb_debug(sb, "pa_type %s\n", ac->ac_pa->pa_type == MB_GROUP_PA ? in ext4_mb_show_ac()
5711 static inline void ext4_mb_show_ac(struct ext4_allocation_context *ac) in ext4_mb_show_ac() argument
5713 ext4_mb_show_pa(ac->ac_sb); in ext4_mb_show_ac()
5724 static void ext4_mb_group_or_file(struct ext4_allocation_context *ac) in ext4_mb_group_or_file() argument
5726 struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb); in ext4_mb_group_or_file()
5727 int bsbits = ac->ac_sb->s_blocksize_bits; in ext4_mb_group_or_file()
5731 if (!(ac->ac_flags & EXT4_MB_HINT_DATA)) in ext4_mb_group_or_file()
5734 if (unlikely(ac->ac_flags & EXT4_MB_HINT_GOAL_ONLY)) in ext4_mb_group_or_file()
5739 size = extent_logical_end(sbi, &ac->ac_o_ex); in ext4_mb_group_or_file()
5740 isize = (i_size_read(ac->ac_inode) + ac->ac_sb->s_blocksize - 1) in ext4_mb_group_or_file()
5745 !inode_is_open_for_write(ac->ac_inode)) in ext4_mb_group_or_file()
5755 ac->ac_flags |= EXT4_MB_STREAM_ALLOC; in ext4_mb_group_or_file()
5757 ac->ac_flags |= EXT4_MB_HINT_NOPREALLOC; in ext4_mb_group_or_file()
5761 BUG_ON(ac->ac_lg != NULL); in ext4_mb_group_or_file()
5767 ac->ac_lg = raw_cpu_ptr(sbi->s_locality_groups); in ext4_mb_group_or_file()
5770 ac->ac_flags |= EXT4_MB_HINT_GROUP_ALLOC; in ext4_mb_group_or_file()
5773 mutex_lock(&ac->ac_lg->lg_mutex); in ext4_mb_group_or_file()
5777 ext4_mb_initialize_context(struct ext4_allocation_context *ac, in ext4_mb_initialize_context() argument
5803 ac->ac_b_ex.fe_logical = EXT4_LBLK_CMASK(sbi, ar->logical); in ext4_mb_initialize_context()
5804 ac->ac_status = AC_STATUS_CONTINUE; in ext4_mb_initialize_context()
5805 ac->ac_sb = sb; in ext4_mb_initialize_context()
5806 ac->ac_inode = ar->inode; in ext4_mb_initialize_context()
5807 ac->ac_o_ex.fe_logical = ac->ac_b_ex.fe_logical; in ext4_mb_initialize_context()
5808 ac->ac_o_ex.fe_group = group; in ext4_mb_initialize_context()
5809 ac->ac_o_ex.fe_start = block; in ext4_mb_initialize_context()
5810 ac->ac_o_ex.fe_len = len; in ext4_mb_initialize_context()
5811 ac->ac_g_ex = ac->ac_o_ex; in ext4_mb_initialize_context()
5812 ac->ac_orig_goal_len = ac->ac_g_ex.fe_len; in ext4_mb_initialize_context()
5813 ac->ac_flags = ar->flags; in ext4_mb_initialize_context()
5817 ext4_mb_group_or_file(ac); in ext4_mb_initialize_context()
5819 mb_debug(sb, "init ac: %u blocks @ %u, goal %u, flags 0x%x, 2^%d, " in ext4_mb_initialize_context()
5822 (unsigned) ar->goal, ac->ac_flags, ac->ac_2order, in ext4_mb_initialize_context()
5912 static void ext4_mb_add_n_trim(struct ext4_allocation_context *ac) in ext4_mb_add_n_trim() argument
5914 int order, added = 0, lg_prealloc_count = 1; in ext4_mb_add_n_trim()
5915 struct super_block *sb = ac->ac_sb; in ext4_mb_add_n_trim()
5916 struct ext4_locality_group *lg = ac->ac_lg; in ext4_mb_add_n_trim()
5917 struct ext4_prealloc_space *tmp_pa, *pa = ac->ac_pa; in ext4_mb_add_n_trim()
5919 order = fls(pa->pa_free) - 1; in ext4_mb_add_n_trim()
5920 if (order > PREALLOC_TB_SIZE - 1) in ext4_mb_add_n_trim()
5922 order = PREALLOC_TB_SIZE - 1; in ext4_mb_add_n_trim()
5937 added = 1; in ext4_mb_add_n_trim()
5960 static void ext4_mb_release_context(struct ext4_allocation_context *ac) in ext4_mb_release_context() argument
5962 struct ext4_sb_info *sbi = EXT4_SB(ac->ac_sb); in ext4_mb_release_context()
5963 struct ext4_prealloc_space *pa = ac->ac_pa; in ext4_mb_release_context()
5968 pa->pa_pstart += EXT4_C2B(sbi, ac->ac_b_ex.fe_len); in ext4_mb_release_context()
5969 pa->pa_lstart += EXT4_C2B(sbi, ac->ac_b_ex.fe_len); in ext4_mb_release_context()
5970 pa->pa_free -= ac->ac_b_ex.fe_len; in ext4_mb_release_context()
5971 pa->pa_len -= ac->ac_b_ex.fe_len; in ext4_mb_release_context()
5984 ext4_mb_add_n_trim(ac); in ext4_mb_release_context()
5988 ext4_mb_put_pa(ac, ac->ac_sb, pa); in ext4_mb_release_context()
5990 if (ac->ac_bitmap_page) in ext4_mb_release_context()
5991 put_page(ac->ac_bitmap_page); in ext4_mb_release_context()
5992 if (ac->ac_buddy_page) in ext4_mb_release_context()
5993 put_page(ac->ac_buddy_page); in ext4_mb_release_context()
5994 if (ac->ac_flags & EXT4_MB_HINT_GROUP_ALLOC) in ext4_mb_release_context()
5995 mutex_unlock(&ac->ac_lg->lg_mutex); in ext4_mb_release_context()
5996 ext4_mb_collect_stats(ac); in ext4_mb_release_context()
6009 needed = EXT4_CLUSTERS_PER_GROUP(sb) + 1; in ext4_mb_discard_preallocations()
6027 struct ext4_allocation_context *ac, u64 *seq) in ext4_mb_discard_preallocations_should_retry() argument
6033 freed = ext4_mb_discard_preallocations(sb, ac->ac_o_ex.fe_len); in ext4_mb_discard_preallocations_should_retry()
6039 if (!(ac->ac_flags & EXT4_MB_STRICT_CHECK) || seq_retry != *seq) { in ext4_mb_discard_preallocations_should_retry()
6040 ac->ac_flags |= EXT4_MB_STRICT_CHECK; in ext4_mb_discard_preallocations_should_retry()
6083 while (1) { in ext4_mb_new_blocks_simple()
6091 blkoff = i + 1; in ext4_mb_new_blocks_simple()
6111 ext4_mb_mark_bb(sb, block, 1, true); in ext4_mb_new_blocks_simple()
6112 ar->len = 1; in ext4_mb_new_blocks_simple()
6125 struct ext4_allocation_context *ac = NULL; in ext4_mb_new_blocks() local
6156 ar->len = ar->len >> 1; in ext4_mb_new_blocks()
6183 ac = kmem_cache_zalloc(ext4_ac_cachep, GFP_NOFS); in ext4_mb_new_blocks()
6184 if (!ac) { in ext4_mb_new_blocks()
6190 ext4_mb_initialize_context(ac, ar); in ext4_mb_new_blocks()
6192 ac->ac_op = EXT4_MB_HISTORY_PREALLOC; in ext4_mb_new_blocks()
6194 if (!ext4_mb_use_preallocated(ac)) { in ext4_mb_new_blocks()
6195 ac->ac_op = EXT4_MB_HISTORY_ALLOC; in ext4_mb_new_blocks()
6196 ext4_mb_normalize_request(ac, ar); in ext4_mb_new_blocks()
6198 *errp = ext4_mb_pa_alloc(ac); in ext4_mb_new_blocks()
6203 *errp = ext4_mb_regular_allocator(ac); in ext4_mb_new_blocks()
6207 * ac->ac_status == AC_STATUS_FOUND. in ext4_mb_new_blocks()
6208 * And error from above mean ac->ac_status != AC_STATUS_FOUND in ext4_mb_new_blocks()
6212 ext4_mb_pa_put_free(ac); in ext4_mb_new_blocks()
6213 ext4_discard_allocated_blocks(ac); in ext4_mb_new_blocks()
6216 if (ac->ac_status == AC_STATUS_FOUND && in ext4_mb_new_blocks()
6217 ac->ac_o_ex.fe_len >= ac->ac_f_ex.fe_len) in ext4_mb_new_blocks()
6218 ext4_mb_pa_put_free(ac); in ext4_mb_new_blocks()
6220 if (likely(ac->ac_status == AC_STATUS_FOUND)) { in ext4_mb_new_blocks()
6221 *errp = ext4_mb_mark_diskspace_used(ac, handle, reserv_clstrs); in ext4_mb_new_blocks()
6223 ext4_discard_allocated_blocks(ac); in ext4_mb_new_blocks()
6226 block = ext4_grp_offs_to_block(sb, &ac->ac_b_ex); in ext4_mb_new_blocks()
6227 ar->len = ac->ac_b_ex.fe_len; in ext4_mb_new_blocks()
6231 ext4_mb_discard_preallocations_should_retry(sb, ac, &seq)) in ext4_mb_new_blocks()
6237 ext4_mb_pa_put_free(ac); in ext4_mb_new_blocks()
6243 ac->ac_b_ex.fe_len = 0; in ext4_mb_new_blocks()
6245 ext4_mb_show_ac(ac); in ext4_mb_new_blocks()
6247 ext4_mb_release_context(ac); in ext4_mb_new_blocks()
6248 kmem_cache_free(ext4_ac_cachep, ac); in ext4_mb_new_blocks()
6359 list_add_tail(&new_entry->efd_list, &sbi->s_freed_data_list[new_entry->efd_tid & 1]); in ext4_mb_free_metadata()
6577 BUG_ON(count > 1); in ext4_free_blocks()
6652 ext4_fsblk_t last_cluster = EXT4_B2C(sbi, block + count - 1); in ext4_group_add_blocks()
6653 unsigned long cluster_count = last_cluster - first_cluster + 1; in ext4_group_add_blocks()
6656 ext4_debug("Adding block(s) %llu-%llu\n", block, block + count - 1); in ext4_group_add_blocks()
6752 if (grp < (ext4_get_groups_count(sb) - 1)) in ext4_last_grp_cluster()
6759 return nr_clusters_in_group - 1; in ext4_last_grp_cluster()
6790 start = mb_find_next_zero_bit(bitmap, max + 1, start); in ext4_try_to_trim_range()
6794 next = mb_find_next_bit(bitmap, last + 1, start); in ext4_try_to_trim_range()
6806 start = next + 1; in ext4_try_to_trim_range()
6899 end = start + (range->len >> sb->s_blocksize_bits) - 1; in ext4_trim_fs()
6914 if (end >= max_blks - 1) in ext4_trim_fs()
6915 end = max_blks - 1; in ext4_trim_fs()
6928 end = EXT4_CLUSTERS_PER_GROUP(sb) - 1; in ext4_trim_fs()
6945 * always be EXT4_CLUSTERS_PER_GROUP(sb)-1, so we only need to in ext4_trim_fs()
7000 end = EXT4_CLUSTERS_PER_GROUP(sb) - 1; in ext4_mballoc_query_range()
7003 start = mb_find_next_zero_bit(bitmap, end + 1, start); in ext4_mballoc_query_range()
7006 next = mb_find_next_bit(bitmap, end + 1, start); in ext4_mballoc_query_range()
7014 start = next + 1; in ext4_mballoc_query_range()