| /openbmc/linux/Documentation/admin-guide/device-mapper/ |
| H A D | cache.rst | 2 Cache title
8 dm-cache is a device mapper target written by Joe Thornber, Heinz
11 It aims to improve performance of a block device (eg, a spindle) by
15 This device-mapper solution allows us to insert this caching at
17 a thin-provisioning pool. Caching solutions that are integrated more
20 The target reuses the metadata library used in the thin-provisioning
23 The decision as to what data to migrate and when is left to a plug-in
32 Movement of the primary copy of a logical block from one
39 The origin device always contains a copy of the logical block, which
40 may be out of date or kept in sync with the copy on the cache device
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| H A D | era.rst | 2 dm-era
8 dm-era is a target that behaves similar to the linear target. In
11 maintains the current era as a monotonically increasing 32-bit
15 partially invalidating the contents of a cache to restore cache
21 era <metadata dev> <origin dev> <block size>
26 block size block size of origin data device, granularity that is
36 ----------
43 ------------------
48 ------------------
55 <metadata block size> <#used metadata blocks>/<#total metadata blocks>
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| H A D | writecache.rst | 6 doesn't cache reads because reads are supposed to be cached in page cache
14 1. type of the cache device - "p" or "s"
15 - p - persistent memory
16 - s - SSD
18 3. the cache device
19 4. block size (4096 is recommended; the maximum block size is the page
20 size)
25 offset from the start of cache device in 512-byte sectors
45 applicable only to persistent memory - use the FUA flag
49 applicable only to persistent memory - don't use the FUA
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| /openbmc/qemu/tests/qemu-iotests/ |
| H A D | 026.out.nocache | 4 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
9 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
11 Event: l1_update; errno: 5; imm: off; once: on; write -b
14 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
17 qemu-io: Failed to flush the L2 table cache: Input/output error
18 qemu-io: Failed to flush the refcount block cache: Input/output error
21 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
23 Event: l1_update; errno: 5; imm: off; once: off; write -b
24 qemu-io: Failed to flush the L2 table cache: Input/output error
25 qemu-io: Failed to flush the refcount block cache: Input/output error
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| H A D | 026.out | 4 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
9 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
11 Event: l1_update; errno: 5; imm: off; once: on; write -b
14 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
17 qemu-io: Failed to flush the L2 table cache: Input/output error
18 qemu-io: Failed to flush the refcount block cache: Input/output error
21 Formatting 'TEST_DIR/t.IMGFMT', fmt=IMGFMT size=1073741824
23 Event: l1_update; errno: 5; imm: off; once: off; write -b
24 qemu-io: Failed to flush the L2 table cache: Input/output error
25 qemu-io: Failed to flush the refcount block cache: Input/output error
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| H A D | 142 | 3 # Test for configuring cache modes of arbitrary nodes (requires O_DIRECT)
43 # We test all cache modes anyway, but O_DIRECT needs to be supported
51 if ! test -t 0; then
57 ) | $QEMU -nographic -monitor stdio -nodefaults "$@"
66 size=128M
68 TEST_IMG="$TEST_IMG.base" _make_test_img $size
69 TEST_IMG="$TEST_IMG.snap" _make_test_img $size
70 _make_test_img -b "$TEST_IMG.base" $size -F $IMGFMT
73 echo === Simple test for all cache modes ===
76 run_qemu -drive file="$TEST_IMG",cache=none
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| H A D | 307.out | 5 {"execute": "nbd-server-start", "arguments": {"addr": {"data": {"path": "SOCK_DIR/PID-socket"}, "ty…
7 {"execute": "query-block-exports", "arguments": {}}
10 === Create a read-only NBD export ===
11 {"execute": "block-export-add", "arguments": {"id": "export0", "node-name": "fmt", "type": "nbd"}}
13 {"execute": "query-block-exports", "arguments": {}}
14 {"return": [{"id": "export0", "node-name": "fmt", "shutting-down": false, "type": "nbd"}]}
17 size: 67108864
18 flags: 0x158f ( readonly flush fua df multi cache block-status-payload )
19 min block: XXX
20 opt block: XXX
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| /openbmc/linux/arch/riscv/boot/dts/sifive/ |
| H A D | fu540-c000.dtsi | 1 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
2 /* Copyright (c) 2018-2019 SiFive, Inc */
4 /dts-v1/;
6 #include <dt-bindings/clock/sifive-fu540-prci.h>
9 #address-cells = <2>;
10 #size-cells = <2>;
11 compatible = "sifive,fu540-c000", "sifive,fu540";
23 #address-cells = <1>;
24 #size-cells = <0>;
28 i-cache-block-size = <64>;
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| H A D | fu740-c000.dtsi | 1 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
4 /dts-v1/;
6 #include <dt-bindings/clock/sifive-fu740-prci.h>
9 #address-cells = <2>;
10 #size-cells = <2>;
11 compatible = "sifive,fu740-c000", "sifive,fu740";
23 #address-cells = <1>;
24 #size-cells = <0>;
28 i-cache-block-size = <64>;
29 i-cache-sets = <128>;
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| /openbmc/linux/Documentation/admin-guide/ |
| H A D | bcache.rst | 2 A block layer cache (bcache)
6 nice if you could use them as cache... Hence bcache.
11 This is the git repository of bcache-tools:
12 https://git.kernel.org/pub/scm/linux/kernel/git/colyli/bcache-tools.git/
17 It's designed around the performance characteristics of SSDs - it only allocates
18 in erase block sized buckets, and it uses a hybrid btree/log to track cached
19 extents (which can be anywhere from a single sector to the bucket size). It's
20 designed to avoid random writes at all costs; it fills up an erase block
25 great lengths to protect your data - it reliably handles unclean shutdown. (It
29 Writeback caching can use most of the cache for buffering writes - writing
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| /openbmc/linux/arch/riscv/boot/dts/thead/ |
| H A D | th1520.dtsi | 1 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
7 #include <dt-bindings/interrupt-controller/irq.h>
11 #address-cells = <2>;
12 #size-cells = <2>;
15 #address-cells = <1>;
16 #size-cells = <0>;
17 timebase-frequency = <3000000>;
24 i-cache-block-size = <64>;
25 i-cache-size = <65536>;
26 i-cache-sets = <512>;
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| /openbmc/linux/Documentation/devicetree/bindings/riscv/ |
| H A D | cpus.yaml | 1 # SPDX-License-Identifier: (GPL-2.0 OR MIT)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: RISC-V CPUs
10 - Paul Walmsley <paul.walmsley@sifive.com>
11 - Palmer Dabbelt <palmer@sifive.com>
12 - Conor Dooley <conor@kernel.org>
15 This document uses some terminology common to the RISC-V community
19 mandated by the RISC-V ISA: a PC and some registers. This
27 - $ref: /schemas/cpu.yaml#
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| /openbmc/linux/fs/btrfs/ |
| H A D | block-group.h | 1 /* SPDX-License-Identifier: GPL-2.0 */
6 #include "free-space-cache.h"
18 /* 0 < size <= 128K */
20 /* 128K < size <= 8M */
22 /* 8M < size < BG_LENGTH */
60 /* Block group flags set at runtime */
69 /* Does the block group need to be added to the free space tree? */
71 /* Indicate that the block group is placed on a sequential zone */
74 * Indicate that block group is in the list of new block groups of a
117 * The last committed used bytes of this block group, if the above @used
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| H A D | block-group.c | 1 // SPDX-License-Identifier: GPL-2.0
7 #include "block-group.h"
8 #include "space-info.h"
9 #include "disk-io.h"
10 #include "free-space-cache.h"
11 #include "free-space-tree.h"
14 #include "ref-verify.h"
16 #include "tree-log.h"
17 #include "delalloc-space.h"
23 #include "extent-tree.h"
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| /openbmc/linux/fs/squashfs/ |
| H A D | file.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Squashfs - a compressed read only filesystem for Linux
14 * compressed fragment block (tail-end packed block). The compressed size
15 * of each datablock is stored in a block list contained within the
19 * larger), the code implements an index cache that caches the mapping from
20 * block index to datablock location on disk.
22 * The index cache allows Squashfs to handle large files (up to 1.75 TiB) while
23 * retaining a simple and space-efficient block list on disk. The cache
26 * The index cache is designed to be memory efficient, and by default uses
45 * Locate cache slot in range [offset, index] for specified inode. If
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| H A D | Kconfig | 1 # SPDX-License-Identifier: GPL-2.0-only
3 tristate "SquashFS 4.0 - Squashed file system support"
4 depends on BLOCK
7 Read-Only File System). Squashfs is a highly compressed read-only
11 Block sizes greater than 4K are supported up to a maximum of 1 Mbytes
12 (default block size 128K). SquashFS 4.0 supports 64 bit filesystems
16 Squashfs is intended for general read-only filesystem use, for
35 intermediate buffer and then memcopied it into the page cache.
37 the page cache.
45 memcopy it into the page cache.
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| /openbmc/linux/arch/riscv/boot/dts/microchip/ |
| H A D | mpfs.dtsi | 1 // SPDX-License-Identifier: (GPL-2.0 OR MIT)
2 /* Copyright (c) 2020-2021 Microchip Technology Inc */
4 /dts-v1/;
5 #include "dt-bindings/clock/microchip,mpfs-clock.h"
8 #address-cells = <2>;
9 #size-cells = <2>;
14 #address-cells = <1>;
15 #size-cells = <0>;
20 i-cache-block-size = <64>;
21 i-cache-sets = <128>;
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| /openbmc/linux/drivers/mtd/ |
| H A D | mtdblock.c | 1 // SPDX-License-Identifier: GPL-2.0-or-later
3 * Direct MTD block device access
5 * Copyright © 1999-2010 David Woodhouse <dwmw2@infradead.org>
6 * Copyright © 2000-2003 Nicolas Pitre <nico@fluxnic.net>
35 * Cache stuff...
38 * buffer cache can handle, we must implement read-modify-write on flash
39 * sectors for each block write requests. To avoid over-erasing flash sectors
40 * and to speed things up, we locally cache a whole flash sector while it is
52 * First, let's erase the flash block. in erase_write()
61 pos, len, mtd->name); in erase_write()
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| /openbmc/linux/Documentation/devicetree/bindings/cache/ |
| H A D | sifive,ccache0.yaml | 1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
4 ---
5 $id: http://devicetree.org/schemas/cache/sifive,ccache0.yaml#
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
8 title: SiFive Composable Cache Controller
11 - Paul Walmsley <paul.walmsley@sifive.com>
14 The SiFive Composable Cache Controller is used to provide access to fast copies
15 of memory for masters in a Core Complex. The Composable Cache Controller also
16 acts as directory-based coherency manager.
24 - sifive,ccache0
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| /openbmc/linux/Documentation/filesystems/ |
| H A D | squashfs.rst | 1 .. SPDX-License-Identifier: GPL-2.0
7 Squashfs is a compressed read-only filesystem for Linux.
11 minimise data overhead. Block sizes greater than 4K are supported up to a
12 maximum of 1Mbytes (default block size 128K).
14 Squashfs is intended for general read-only filesystem use, for archival
16 block device/memory systems (e.g. embedded systems) where low overhead is
19 Mailing list: squashfs-devel@lists.sourceforge.net
23 ----------------------
30 Max filesystem size 2^64 256 MiB
31 Max file size ~ 2 TiB 16 MiB
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| /openbmc/linux/fs/affs/ |
| H A D | file.c | 1 // SPDX-License-Identifier: GPL-2.0
5 * (c) 1996 Hans-Joachim Widmaier - Rewritten
7 * (C) 1993 Ray Burr - Modified for Amiga FFS filesystem.
11 * (C) 1991 Linus Torvalds - minix filesystem
27 inode->i_ino, atomic_read(&AFFS_I(inode)->i_opencnt)); in affs_file_open()
28 atomic_inc(&AFFS_I(inode)->i_opencnt); in affs_file_open()
36 inode->i_ino, atomic_read(&AFFS_I(inode)->i_opencnt)); in affs_file_release()
38 if (atomic_dec_and_test(&AFFS_I(inode)->i_opencnt)) { in affs_file_release()
40 if (inode->i_size != AFFS_I(inode)->mmu_private) in affs_file_release()
52 struct super_block *sb = inode->i_sb; in affs_grow_extcache()
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| /openbmc/linux/arch/powerpc/kernel/ |
| H A D | cacheinfo.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * Processor cache information made available to userspace via sysfs;
26 /* per-cpu object for tracking:
27 * - a "cache" kobject for the top-level directory
28 * - a list of "index" objects representing the cpu's local cache hierarchy
31 struct kobject *kobj; /* bare (not embedded) kobject for cache
36 /* "index" object: each cpu's cache directory has an index
37 * subdirectory corresponding to a cache object associated with the
43 struct cache *cache; member
47 * cache type */
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| /openbmc/linux/arch/powerpc/include/asm/ |
| H A D | vdso_datapage.h | 1 /* SPDX-License-Identifier: GPL-2.0-or-later */
62 __u64 physicalMemorySize; /* Size of real memory(B) 0x28 */
70 __u32 dcache_size; /* L1 d-cache size 0x60 */
71 __u32 dcache_line_size; /* L1 d-cache line size 0x64 */
72 __u32 icache_size; /* L1 i-cache size 0x68 */
73 __u32 icache_line_size; /* L1 i-cache line size 0x6C */
78 __u32 dcache_block_size; /* L1 d-cache block size */
79 __u32 icache_block_size; /* L1 i-cache block size */
80 __u32 dcache_log_block_size; /* L1 d-cache log block size */
81 __u32 icache_log_block_size; /* L1 i-cache log block size */
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| /openbmc/linux/drivers/md/ |
| H A D | dm-cache-target.c | 1 // SPDX-License-Identifier: GPL-2.0-only
9 #include "dm-bio-prison-v2.h"
10 #include "dm-bio-record.h"
11 #include "dm-cache-metadata.h"
12 #include "dm-io-tracker.h"
13 #include "dm-cache-background-tracker.h"
15 #include <linux/dm-io.h>
16 #include <linux/dm-kcopyd.h>
25 #define DM_MSG_PREFIX "cache"
28 "A percentage of time allocated for copying to and/or from cache");
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| /openbmc/qemu/system/ |
| H A D | physmem.c | 21 #include "exec/page-vary.h"
31 #include "hw/core/tcg-cpu-ops.h"
34 #include "exec/exec-all.h"
35 #include "exec/page-protection.h"
37 #include "hw/qdev-core.h"
38 #include "hw/qdev-properties.h"
45 #include "qemu/config-file.h"
46 #include "qemu/error-report.h"
47 #include "qemu/qemu-print.h"
55 #include "sysemu/xen-mapcache.h"
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