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/linux/Documentation/driver-api/md/
H A Draid5-cache.rst7 caches data to the RAID disks. The cache can be in write-through (supported
8 since 4.4) or write-back mode (supported since 4.10). mdadm (supported since
9 3.4) has a new option '--write-journal' to create array with cache. Please
11 in write-through mode. A user can switch it to write-back mode by::
13 echo "write-back" > /sys/block/md0/md/journal_mode
15 And switch it back to write-through mode by::
17 echo "write-through" > /sys/block/md0/md/journal_mode
22 write-through mode
25 This mode mainly fixes the 'write hole' issue. For RAID 4/5/6 array, an unclean
27 and parity don't match. The reason is that a stripe write involves several RAID
[all …]
/linux/tools/testing/selftests/net/
H A Dproc_net_pktgen.c127 len = write(self->thr_fd, thr_cmd_add_loopback_0, sizeof(thr_cmd_add_loopback_0)); in FIXTURE_SETUP()
141 len = write(self->thr_fd, thr_cmd_rm_loopback_0, sizeof(thr_cmd_rm_loopback_0)); in FIXTURE_TEARDOWN()
155 len = write(self->ctrl_fd, wrong_ctrl_cmd, i); in TEST_F()
164 len = write(self->ctrl_fd, ctrl_cmd_stop, sizeof(ctrl_cmd_stop)); in TEST_F()
167 len = write(self->ctrl_fd, ctrl_cmd_stop, sizeof(ctrl_cmd_stop) - 1); in TEST_F()
170 len = write(self->ctrl_fd, ctrl_cmd_start, sizeof(ctrl_cmd_start)); in TEST_F()
173 len = write(self->ctrl_fd, ctrl_cmd_start, sizeof(ctrl_cmd_start) - 1); in TEST_F()
176 len = write(self->ctrl_fd, ctrl_cmd_reset, sizeof(ctrl_cmd_reset)); in TEST_F()
179 len = write(self->ctrl_fd, ctrl_cmd_reset, sizeof(ctrl_cmd_reset) - 1); in TEST_F()
187 len = write(self->thr_fd, wrong_thr_cmd, i); in TEST_F()
[all …]
/linux/include/dt-bindings/memory/
H A Dtegra234-mc.h182 /* MSS internal memqual MIU7 write clients */
186 /* MSS internal memqual MIU8 write clients */
190 /* MSS internal memqual MIU9 write clients */
194 /* MSS internal memqual MIU10 write clients */
198 /* MSS internal memqual MIU11 write clients */
202 /* MSS internal memqual MIU12 write clients */
206 /* MSS internal memqual MIU13 write clients */
230 /* PCIE6 write clients */
243 /* PCIE7 write clients */
247 /* High-definition audio (HDA) write clients */
[all …]
H A Dtegra194-mc.h149 /* MSS internal memqual MIU7 write clients */
161 /* High-definition audio (HDA) write clients */
165 /* SATA write clients */
171 /* ISP Write client for Crossbar A */
173 /* ISP Write client Crossbar B */
177 /* XUSB_HOST write clients */
181 /* XUSB_DEV write clients */
189 /* sdmmca memory write client */
191 /* sdmmc memory write client */
193 /* sdmmcd memory write client */
[all …]
H A Dnvidia,tegra264.h65 /* VIC Write client */
67 /* VI R5 Write client */
73 /* Audio processor(APE) Write client */
77 /* Audio DMA Write client */
83 /* VI Falcon Write client */
87 /* Write client of RCE */
89 /* PCIE0/MSI Write clients */
93 /* PCIE1/RPX4 Write clients */
97 /* PCIE2/DMX4 Write clients */
101 /* PCIE3/RPX4 Write clients */
[all …]
/linux/tools/perf/pmu-events/arch/s390/cf_z16/
H A Dextended.json7 …"PublicDescription": "A directory write to the Level-1 Data cache where the line was originally in…
97 "BriefDescription": "Directory Write Level 1 Data Cache from L2-Cache",
98 …"PublicDescription": "A directory write to the Level-1 Data cache directory where the returned cac…
104 "BriefDescription": "Directory Write Level 1 Data Cache from L2-Cache with Intervention",
105 …"PublicDescription": "A directory write to the Level-1 Data cache directory where the returned cac…
111 "BriefDescription": "Directory Write Level 1 Data Cache from L2-Cache with Chip HP Hit",
112 …"PublicDescription": "A directory write to the Level-1 Data cache directory where the returned cac…
118 "BriefDescription": "Directory Write Level 1 Data Cache from L2-Cache with Drawer HP Hit",
119 …"PublicDescription": "A directory write to the Level-1 Data cache directory where the returned cac…
125 "BriefDescription": "Directory Write Level 1 Data Cache from On-Chip L2-Cache",
[all …]
/linux/tools/perf/pmu-events/arch/arm64/freescale/imx8mp/sys/
H A Dmetrics.json11 "BriefDescription": "bytes of all masters write to ddr",
13 "MetricExpr": "imx8_ddr0@axid\\-write\\,axi_mask\\=0xffff\\,axi_id\\=0x0000@",
27 "BriefDescription": "bytes of a53 core write to ddr",
29 "MetricExpr": "imx8_ddr0@axid\\-write\\,axi_mask\\=0x0000\\,axi_id\\=0x0000@",
43 "BriefDescription": "bytes of supermix(m7) write to ddr",
45 "MetricExpr": "imx8_ddr0@axid\\-write\\,axi_mask\\=0x000f\\,axi_id\\=0x0020@",
59 "BriefDescription": "bytes of gpu 3d write to ddr",
61 "MetricExpr": "imx8_ddr0@axid\\-write\\,axi_mask\\=0x0000\\,axi_id\\=0x0070@",
75 "BriefDescription": "bytes of gpu 2d write to ddr",
77 "MetricExpr": "imx8_ddr0@axid\\-write\\,axi_mask\\=0x0000\\,axi_id\\=0x0071@",
[all …]
/linux/drivers/gpu/drm/ci/xfails/
H A Dmsm-sm8350-hdk-skips.txt24 # [ 200.895243] *** gpu fault: ttbr0=00000001160d6000 iova=0001000000001000 dir=WRITE type=PERMISS…
25 # [ 200.906885] *** gpu fault: ttbr0=00000001160d6000 iova=0001000000001000 dir=WRITE type=UNKNOWN…
26 # [ 200.917625] *** gpu fault: ttbr0=00000001160d6000 iova=0001000000001000 dir=WRITE type=UNKNOWN…
27 # [ 200.928353] *** gpu fault: ttbr0=00000001160d6000 iova=0001000000001000 dir=WRITE type=UNKNOWN…
28 # [ 200.939084] *** gpu fault: ttbr0=00000001160d6000 iova=0001000000001000 dir=WRITE type=UNKNOWN…
29 # [ 200.949815] *** gpu fault: ttbr0=00000001160d6000 iova=0001000000001000 dir=WRITE type=UNKNOWN…
31 # [ 200.960467] *** gpu fault: ttbr0=00000001160d6000 iova=0001000000001000 dir=WRITE type=UNKNOWN…
32 # [ 200.960500] *** gpu fault: ttbr0=00000001160d6000 iova=0001000000001000 dir=WRITE type=UNKNOWN…
33 # [ 200.995966] *** gpu fault: ttbr0=00000001160d6000 iova=0001000000001000 dir=WRITE type=UNKNOWN…
34 # [ 201.006702] *** gpu fault: ttbr0=00000001160d6000 iova=0001000000001000 dir=WRITE type=UNKNOWN…
[all …]
/linux/tools/perf/pmu-events/arch/s390/cf_z17/
H A Dextended.json7 …"PublicDescription": "A directory write to the Level-1 Data cache where the line was originally in…
97 "BriefDescription": "Directory Write Level 1 Data Cache from L2-Cache",
98 …"PublicDescription": "A directory write to the Level-1 Data cache directory where the returned cac…
104 "BriefDescription": "Directory Write Level 1 Data Cache from L2-Cache with Intervention",
105 …"PublicDescription": "A directory write to the Level-1 Data cache directory where the returned cac…
111 "BriefDescription": "Directory Write Level 1 Data Cache from L2-Cache with Chip HP Hit",
112 …"PublicDescription": "A directory write to the Level-1 Data cache directory where the returned cac…
118 "BriefDescription": "Directory Write Level 1 Data Cache from L2-Cache with Drawer HP Hit",
119 …"PublicDescription": "A directory write to the Level-1 Data cache directory where the returned cac…
125 "BriefDescription": "Directory Write Level 1 Data Cache from On-Chip L2-Cache",
[all …]
/linux/tools/testing/selftests/kvm/x86/
H A Dhyperv_features.c27 bool write; member
49 if (msr->write) in guest_msr()
52 if (!vector && (!msr->write || !is_write_only_msr(msr->idx))) in guest_msr()
58 msr->write ? "WR" : "RD", msr->idx, ex_str(vector)); in guest_msr()
62 msr->write ? "WR" : "RD", msr->idx, ex_str(vector)); in guest_msr()
67 if (msr->write) in guest_msr()
169 msr->write = false; in guest_test_msrs_access()
174 msr->write = false; in guest_test_msrs_access()
184 msr->write = true; in guest_test_msrs_access()
190 msr->write = false; in guest_test_msrs_access()
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/linux/tools/perf/pmu-events/arch/arm64/
H A Drecommended.json9 "PublicDescription": "Attributable Level 1 data cache access, write",
12 "BriefDescription": "L1D cache access, write"
21 "PublicDescription": "Attributable Level 1 data cache refill, write",
24 "BriefDescription": "L1D cache refill, write"
39 "PublicDescription": "Attributable Level 1 data cache Write-Back, victim",
42 "BriefDescription": "L1D cache Write-Back, victim"
45 "PublicDescription": "Level 1 data cache Write-Back, cleaning and coherency",
48 "BriefDescription": "L1D cache Write-Back, cleaning and coherency"
63 "PublicDescription": "Attributable Level 1 data TLB refill, write",
66 "BriefDescription": "L1D tlb refill, write"
[all …]
/linux/Documentation/admin-guide/perf/
H A Dfujitsu_uncore_pmu.rst54 - write-count
55 This event counts the number of write requests to MAC (including zero write,
56 full write, partial write, write cancel).
57 - write-count-write
58 This event counts the number of full write requests to MAC (not including
59 zero write).
60 - write-count-pwrite
61 This event counts the number of partial write requests to MAC.
64 - memory-write-count
65 This event counts the number of full write requests from MAC to memory.
[all …]
/linux/include/trace/events/
H A Dmmap_lock.h16 TP_PROTO(struct mm_struct *mm, bool write),
18 TP_ARGS(mm, write),
23 __field(bool, write)
29 __entry->write = write;
33 "mm=%p memcg_id=%llu write=%s",
35 __entry->write ? "true" : "false"
41 TP_PROTO(struct mm_struct *mm, bool write), \
42 TP_ARGS(mm, write))
49 TP_PROTO(struct mm_struct *mm, bool write, bool success),
51 TP_ARGS(mm, write, success),
[all …]
/linux/drivers/net/ethernet/aquantia/atlantic/macsec/
H A Dmacsec_api.h57 /*! Pack the fields of rec, and write the packed data into the
59 * rec - [IN] The bitfield values to write to the table row.
60 * table_index - The table row to write(max 23).
75 /*! Pack the fields of rec, and write the packed data into the
77 * rec - [IN] The bitfield values to write to the table row.
78 * table_index - The table row to write (max 47).
93 /*! Pack the fields of rec, and write the packed data into the
95 * rec - [IN] The bitfield values to write to the table row.
96 * table_index - The table row to write (max 31).
111 /*! Pack the fields of rec, and write the packed data into the
[all …]
/linux/Documentation/ABI/testing/
H A Dsysfs-class-bdi32 (read-write)
38 total write-back cache that relates to its current average
42 percentage of the write-back cache to a particular device.
45 (read-write)
52 total write-back cache that relates to its current average
56 of the write-back cache to a particular device. The value is
60 (read-write)
67 given percentage of the write-back cache. This is useful in
69 most of the write-back cache. For example in case of an NFS
73 (read-write)
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/linux/drivers/gpib/hp_82341/
H A Dhp_82341.h40 XILINX_DATA_REG = 0x2, // before initialization, write only
108 MONITOR_CLEAR_HOLDOFF_BIT = 0x2, // write only
109 MONITOR_PPOLL_BIT = 0x4, // write clear
110 MONITOR_SRQ_BIT = 0x8, // write clear
111 MONITOR_IFC_BIT = 0x10, // write clear
112 MONITOR_REN_BIT = 0x20, // write clear
113 MONITOR_END_BIT = 0x40, // write clear
114 MONITOR_DAV_BIT = 0x80 // write clear
126 TI_INTERRUPT_EVENT_BIT = 0x1, // write clear
128 POINTERS_EQUAL_EVENT_BIT = 0x4, // write clear
[all …]
/linux/Documentation/wmi/devices/
H A Dmsi-wmi-platform.rst26 [WmiDataId(1), read, write, Description("16 bytes of data")] uint8 Bytes[16];
33 [WmiDataId(1), read, write, Description("32 bytes of data")] uint8 Bytes[32];
43 [WmiMethodId(1), Implemented, read, write, Description("Return the contents of a package")]
46 [WmiMethodId(2), Implemented, read, write, Description("Set the contents of a package")]
49 [WmiMethodId(3), Implemented, read, write, Description("Return the contents of a package")]
52 [WmiMethodId(4), Implemented, read, write, Description("Set the contents of a package")]
55 [WmiMethodId(5), Implemented, read, write, Description("Return the contents of a package")]
58 [WmiMethodId(6), Implemented, read, write, Description("Set the contents of a package")]
61 [WmiMethodId(7), Implemented, read, write, Description("Return the contents of a package")]
64 [WmiMethodId(8), Implemented, read, write, Description("Set the contents of a package")]
[all …]
/linux/Documentation/filesystems/
H A Dzonefs.rst12 device support (e.g. f2fs), zonefs does not hide the sequential write
14 write zones of the device must be written sequentially starting from the end
38 conventional zones. Any read or write access can be executed, similarly to a
41 sequentially. Each sequential zone has a write pointer maintained by the
42 device that keeps track of the mandatory start LBA position of the next write
43 to the device. As a result of this write constraint, LBAs in a sequential zone
53 to, for instance, reduce internal write amplification due to garbage collection.
73 information. File sizes come from the device zone type and write pointer
80 state to make it read-only, preventing any data write.
94 For sequential write zones, the sub-directory "seq" is used.
[all …]
/linux/arch/loongarch/kernel/
H A Dunaligned.c270 bool sign, write; in emulate_load_store_insn() local
284 write = false; in emulate_load_store_insn()
289 write = false; in emulate_load_store_insn()
294 write = true; in emulate_load_store_insn()
299 write = false; in emulate_load_store_insn()
304 write = false; in emulate_load_store_insn()
309 write = true; in emulate_load_store_insn()
314 write = false; in emulate_load_store_insn()
319 write = true; in emulate_load_store_insn()
325 write = false; in emulate_load_store_insn()
[all …]
/linux/tools/testing/selftests/bpf/
H A Dgenerate_udp_fragments.py8 fragmented packets in C, it is much harder to read and write
10 easy to read / write.
12 So we choose to write this script that generates a valid C
33 f.write("// SPDX-License-Identifier: GPL-2.0\n")
34 f.write("/* DO NOT EDIT -- this file is generated */\n")
35 f.write("\n")
36 f.write("#ifndef _IP_CHECK_DEFRAG_FRAGS_H\n")
37 f.write("#define _IP_CHECK_DEFRAG_FRAGS_H\n")
38 f.write("\n")
39 f.write("#include <stdint.h>\n")
[all …]
/linux/tools/perf/pmu-events/arch/s390/cf_z13/
H A Dextended.json7 …"PublicDescription": "A directory write to the Level-1 Data cache where the line was originally in…
42 …"PublicDescription": "A directory write to the Level-1 Data cache directory where the returned cac…
63 …"PublicDescription": "A directory write to the Level-1 Instruction cache directory where the retur…
112 …"PublicDescription": "A directory write to the Level-1 Data cache directory where the returned cac…
119 …"PublicDescription": "A directory write to the Level-1 Data cache directory where the returned cac…
126 …"PublicDescription": "A directory write to the Level-1 Data cache directory where the returned cac…
133 …"PublicDescription": "A directory write to the Level-1 Data cache directory where the returned cac…
140 …"PublicDescription": "A directory write to the Level-1 Data cache directory where the returned cac…
147 …"PublicDescription": "A directory write to the Level-1 Data cache directory where the returned cac…
154 …"PublicDescription": "A directory write to the Level-1 Data cache directory where the returned cac…
[all …]
/linux/arch/mips/kernel/
H A Dcps-vec-ns16550.S32 * _mips_cps_putc() - write a character to the UART
33 * @a0: ASCII character to write
45 * _mips_cps_puts() - write a string to the UART
49 * Write a null-terminated ASCII string to the UART.
65 * _mips_cps_putx4 - write a 4b hex value to the UART
66 * @a0: the 4b value to write to the UART
69 * Write a single hexadecimal character to the UART.
82 * _mips_cps_putx8 - write an 8b hex value to the UART
83 * @a0: the 8b value to write to the UART
86 * Write an 8 bit value (ie. 2 hexadecimal characters) to the UART.
[all …]
/linux/tools/perf/pmu-events/arch/x86/snowridgex/
H A Duncore-memory.json14 "BriefDescription": "write requests to memory controller. Derived from unc_m_cas_count.wr",
19 …"PublicDescription": "Counts the total number of DRAM Write CAS commands issued, w/ and w/o auto-p…
110 "BriefDescription": "All DRAM write CAS commands issued",
115 …"PublicDescription": "Counts the total number of DRAM Write CAS commands issued, w/ and w/o auto-p…
405 …ommands. : Precharge due to write : Counts the number of DRAM Precharge commands sent on this chan…
452 …erally do not expect to see RPQ become full except for potentially during Write Major Mode or whil…
462 …erally do not expect to see RPQ become full except for potentially during Write Major Mode or whil…
526 "BriefDescription": "Write Pending Queue Full Cycles",
532 …Write Pending Queue Full Cycles : Counts the number of cycles when the Write Pending Queue is full…
536 "BriefDescription": "Write Pending Queue Full Cycles",
[all …]
/linux/Documentation/filesystems/ext4/
H A Datomic_writes.rst10 Atomic (untorn) block writes ensure that either the entire write is committed
17 EXT4 supports atomic write operations with a single filesystem block since
18 v6.13. In this the atomic write unit minimum and maximum sizes are both set
20 e.g. doing atomic write of 16KB with 16KB filesystem blocksize on 64KB
25 using a feature known as bigalloc. The atomic write unit's minimum and
27 based on the underlying device’s supported atomic write unit limits.
44 NOTE: EXT4 does not support software or COW based atomic write, which means
56 following constraints. The minimum atomic write size is the larger of the fs
57 block size and the minimum hardware atomic write unit; and the maximum atomic
58 write size is smaller of the bigalloc cluster size and the maximum hardware
[all …]
/linux/arch/loongarch/mm/
H A Dfault.c34 static int __kprobes spurious_fault(unsigned long write, unsigned long address) in spurious_fault() argument
62 return write ? pmd_write(pmdp_get(pmd)) : 1; in spurious_fault()
68 return write ? pte_write(ptep_get(pte)) : 1; in spurious_fault()
73 unsigned long write, unsigned long address) in no_context() argument
77 if (spurious_fault(write, address)) in no_context()
84 if (kfence_handle_page_fault(address, write, regs)) in no_context()
101 unsigned long write, unsigned long address) in do_out_of_memory() argument
108 no_context(regs, write, address); in do_out_of_memory()
115 unsigned long write, unsigned long address, int si_code) in do_sigbus() argument
119 no_context(regs, write, address); in do_sigbus()
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