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/linux/drivers/gpu/drm/ci/xfails/
H A Dvkms-none-fails.txt19 kms_writeback@writeback-check-output,Fail
20 kms_writeback@writeback-check-output-XRGB2101010,Fail
21 kms_writeback@writeback-fb-id,Fail
22 kms_writeback@writeback-fb-id-XRGB2101010,Fail
23 kms_writeback@writeback-invalid-parameters,Fail
24 kms_writeback@writeback-pixel-formats,Fail
/linux/Documentation/admin-guide/blockdev/
H A Dzram.rst51 and writeback simultaneously).
218 writeback operations
219 compressed_writeback RW show and set compressed writeback feature
326 not used pages). This feature is useful for e.g. zram writeback and
342 writeback section in Optional Feature
352 If admin wants to use incompressible page writeback, they could do it via::
354 echo huge > /sys/block/zramX/writeback
356 Admin can request writeback of idle pages at right timing via::
358 echo idle > /sys/block/zramX/writeback
360 With the command, zram will writeback idle pages from memory to the storage.
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/linux/drivers/gpu/drm/vkms/
H A Dvkms_config.h73 bool writeback; member
358 return crtc_cfg->writeback; in vkms_config_crtc_get_writeback()
368 bool writeback) in vkms_config_crtc_set_writeback() argument
370 crtc_cfg->writeback = writeback; in vkms_config_crtc_set_writeback()
H A Dvkms_output.c17 int writeback; in vkms_output_init() local
45 writeback = vkms_enable_writeback_connector(vkmsdev, crtc_cfg->crtc); in vkms_output_init()
46 if (writeback) in vkms_output_init()
H A Dvkms_configfs.c140 bool writeback; in crtc_writeback_show() local
145 writeback = vkms_config_crtc_get_writeback(crtc->config); in crtc_writeback_show()
147 return sprintf(page, "%d\n", writeback); in crtc_writeback_show()
154 bool writeback; in crtc_writeback_store() local
158 if (kstrtobool(page, &writeback)) in crtc_writeback_store()
165 vkms_config_crtc_set_writeback(crtc->config, writeback); in crtc_writeback_store()
171 CONFIGFS_ATTR(crtc_, writeback);
/linux/Documentation/admin-guide/device-mapper/
H A Dwritecache.rst27 start writeback when the number of used blocks reach this
30 stop writeback when the number of used blocks drops below
34 writeback. Setting this value reduces writeback
60 writes) and it will gradually writeback any cached
74 pause writeback if there was some write I/O redirected to
82 4. the number of blocks under writeback
H A Ddm-pcache.rst32 …pcache <cache_dev> <backing_dev> [<number_of_optional_arguments> <cache_mode writeback> <data_crc …
40 ``cache_mode`` Optional, Only ``writeback`` is accepted at the
56 … "0 $(blockdev --getsz /dev/sdb) pcache /dev/pmem0 /dev/sdb 4 cache_mode writeback data_crc true"
184 … "0 $(blockdev --getsz /dev/sdb) pcache /dev/pmem0 /dev/sdb 4 cache_mode writeback data_crc true"
H A Dcache.rst81 The cache has three operating modes: writeback, writethrough and
84 If writeback, the default, is selected then a write to a block that is
102 writethrough or writeback mode while still warm. Otherwise, the cache
113 importance if writeback mode is used. Writethrough and passthrough
116 warm and in writeback mode during resize.
192 feature args writethrough or passthrough (The default is writeback.)
334 /dev/mapper/ssd /dev/mapper/origin 512 1 writeback default 0'
336 /dev/mapper/ssd /dev/mapper/origin 1024 1 writeback \
/linux/arch/arm/mm/
H A Dabort-lv4t.S62 tst r8, #1 << 21 @ check writeback bit
63 beq do_DataAbort @ no writeback -> no fixup
87 tst r8, #1 << 21 @ Check writeback bit
88 beq do_DataAbort @ No writeback -> no fixup
107 tst r8, #1 << 21 @ check writeback bit
108 beq do_DataAbort @ no writeback -> no fixup
123 tst r8, #1 << 21 @ check writeback bit
124 beq do_DataAbort @ no writeback -> no fixup
/linux/Documentation/filesystems/fuse/
H A Dfuse-io.rst12 + writeback-cache
27 writeback-cache mode may be selected by the FUSE_WRITEBACK_CACHE flag in the
35 In writeback-cache mode (enabled by the FUSE_WRITEBACK_CACHE flag) writes go to
37 fast. Dirty pages are written back implicitly (background writeback or page
/linux/drivers/gpu/drm/renesas/rcar-du/
H A Drcar_du_writeback.c203 struct drm_writeback_connector *wb_conn = &rcrtc->writeback; in rcar_du_writeback_init()
225 state = rcrtc->writeback.base.state; in rcar_du_writeback_setup()
240 drm_writeback_queue_job(&rcrtc->writeback, state); in rcar_du_writeback_setup()
245 drm_writeback_signal_completion(&rcrtc->writeback, 0); in rcar_du_writeback_complete()
H A Drcar_du_crtc.h75 struct drm_writeback_connector writeback; member
79 #define wb_to_rcar_crtc(c) container_of(c, struct rcar_du_crtc, writeback)
/linux/Documentation/ABI/testing/
H A Dsysfs-block-bcache7 writeback mode is automatically disabled and all dirty data is
59 What: /sys/block/<disk>/bcache/writeback
63 For backing devices: When on, writeback caching is enabled and
82 For backing devices: In writeback mode, when dirty data is
84 backing device, writeback from cache to backing device starts
91 For backing devices: If nonzero, writeback from cache to
107 writeback caching enabled.
H A Dsysfs-block-zram102 What: /sys/block/zram<id>/writeback
106 The writeback file is write-only and trigger idle and/or
107 huge page writeback to backing device.
130 amount of writeback ZRAM can do. The limit could be changed
159 writeback feature.
166 number of in-flight writeback operations.
/linux/drivers/media/platform/renesas/vsp1/
H A Dvsp1_wpf.c254 if (!pipe->iif && (!pipe->lif || wpf->writeback)) { in wpf_configure_stream()
358 if (wpf->writeback) { in wpf_configure_stream()
361 wpf->writeback = false; in wpf_configure_stream()
365 wpf->writeback ? VI6_WPF_WRBCK_CTRL_WBMD : 0); in wpf_configure_stream()
431 if (pipe->lif && !wpf->writeback) in wpf_configure_partition()
525 wpf->writeback = false; in wpf_configure_partition()
/linux/include/trace/events/
H A Dbcache.h153 bool writeback, bool bypass),
154 TP_ARGS(c, inode, bio, writeback, bypass),
162 __field(bool, writeback )
172 __entry->writeback = writeback;
179 __entry->nr_sector, __entry->writeback, __entry->bypass)
/linux/drivers/gpu/drm/ttm/
H A Dttm_backup.c97 bool writeback, pgoff_t idx, gfp_t page_gfp, in ttm_backup_backup_page() argument
115 if (writeback && !folio_mapped(to_folio) && in ttm_backup_backup_page()
/linux/fs/orangefs/
H A Dwaitqueue.c324 int writeback = flags & ORANGEFS_OP_WRITEBACK, in wait_for_matching_downcall() local
333 if (writeback) in wait_for_matching_downcall()
335 else if (!writeback && interruptible) in wait_for_matching_downcall()
/linux/drivers/gpu/drm/xe/
H A Dxe_shrinker.c112 save_flags.writeback = false; in xe_shrinker_walk()
128 if (flags.writeback) { in xe_shrinker_walk()
212 .writeback = !ctx.no_wait_gpu && (sc->gfp_mask & __GFP_IO), in xe_shrinker_scan()
/linux/Documentation/admin-guide/
H A Dbcache.rst22 Both writethrough and writeback caching are supported. Writeback defaults to
42 in the cache it first disables writeback caching and waits for all dirty data
110 important if you have writeback caching turned on.
141 - For writeback writes, we currently pass that error back up to the
146 writeback mode). It currently doesn't do anything intelligent if it fails to
167 Note that this may cause data loss if you were running in writeback mode.
344 running in writeback mode, which isn't the default (not due to a lack of
345 maturity, but simply because in writeback mode you'll lose data if something
348 # echo writeback > /sys/block/bcache0/bcache/cache_mode
412 Can be one of either writethrough, writeback, writearound or none.
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/linux/drivers/block/zram/
H A DKconfig116 With /sys/block/zramX/{idle,writeback}, application could ask
117 idle page's writeback to the backing device to save in memory.
127 pages writeback.
/linux/drivers/md/bcache/
H A Drequest.c176 if (op->writeback) in bch_data_insert_endio()
224 op->writeback)) in CLOSURE_CALLBACK()
232 if (op->writeback) { in CLOSURE_CALLBACK()
256 BUG_ON(op->writeback); in CLOSURE_CALLBACK()
313 op->writeback, op->bypass); in CLOSURE_CALLBACK()
666 if (unlikely(s->iop.writeback && in backing_request_endio()
997 s->iop.writeback = true; in cached_dev_write()
1014 s->iop.writeback = true; in cached_dev_write()
1029 } else if (s->iop.writeback) { in cached_dev_write()
1311 s->iop.writeback = true; in flash_dev_submit_bio()
/linux/Documentation/filesystems/iomap/
H A Doperations.rst32 mapping, managing uptodate and dirty state, or writeback of pagecache
95 can take folio locks, fault on userspace pages, initiate writeback
103 For the pagecache, races can happen if writeback doesn't take
109 fsdax does not need this revalidation because there's no writeback
257 because writeback will not consume the reservation.
267 to the same region and triggers writeback to flush the dirty data out to
315 writeback.
319 ``->writeback_range`` machinery described below even if the writeback fails.
363 If this succeeds, iomap_finish_folio_write() must be called once writeback
364 completes for the range, regardless of whether the writeback succeeded or
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/linux/Documentation/filesystems/
H A Dnetfs_library.rst18 - Inode writeback.
41 takes over the normal buffered read, readahead, write and writeback and also
117 * For writeback, it is unknown how much there will be to write until the
164 special value (``NETFS_FOLIO_COPY_TO_CACHE``) and left to writeback to write.
168 When writeback occurs, folios that are so marked will only be written to the
256 writeback thing.
323 Netfslib will pin resources on an inode for future writeback (such as pinning
334 2) This flag then cleared inside the inode lock during inode writeback in the
414 On all three write functions, there is a writeback group pointer (which should
417 a different group, it is flushed first. The writeback API allows writing back
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/linux/drivers/gpu/drm/amd/display/dc/dml2_0/dml21/inc/bounding_boxes/
H A Ddcn4_soc_bb.h48 .writeback = {
174 .writeback = {

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