| /kernel/linux/linux-4.19/Documentation/device-mapper/ |
| D | cache.txt | 4 dm-cache is a device mapper target written by Joe Thornber, Heinz
7 It aims to improve performance of a block device (eg, a spindle) by
11 This device-mapper solution allows us to insert this caching at
13 a thin-provisioning pool. Caching solutions that are integrated more
16 The target reuses the metadata library used in the thin-provisioning
19 The decision as to what data to migrate and when is left to a plug-in
27 Migration - Movement of the primary copy of a logical block from one
29 Promotion - Migration from slow device to fast device.
30 Demotion - Migration from fast device to slow device.
32 The origin device always contains a copy of the logical block, which
[all …]
|
| D | era.txt | 4 dm-era is a target that behaves similar to the linear target. In
7 maintains the current era as a monotonically increasing 32-bit
11 partially invalidating the contents of a cache to restore cache
17 era <metadata dev> <origin dev> <block size>
21 block size : block size of origin data device, granularity that is
30 ----------
37 ------------------
42 ------------------
49 <metadata block size> <#used metadata blocks>/<#total metadata blocks>
50 <current era> <held metadata root | '-'>
[all …]
|
| /kernel/linux/linux-5.10/Documentation/admin-guide/device-mapper/ |
| 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40 may be out of date or kept in sync with the copy on the cache device
[all …]
|
| 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>
[all …]
|
| /kernel/linux/linux-5.10/arch/riscv/boot/dts/sifive/ |
| 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>;
[all …]
|
| /kernel/linux/linux-4.19/Documentation/admin-guide/ |
| D | bcache.rst | 2 A block layer cache (bcache)
6 nice if you could use them as cache... Hence bcache.
10 - http://bcache.evilpiepirate.org
11 - http://evilpiepirate.org/git/linux-bcache.git
12 - http://evilpiepirate.org/git/bcache-tools.git
14 It's designed around the performance characteristics of SSDs - it only allocates
15 in erase block sized buckets, and it uses a hybrid btree/log to track cached
16 extents (which can be anywhere from a single sector to the bucket size). It's
17 designed to avoid random writes at all costs; it fills up an erase block
22 great lengths to protect your data - it reliably handles unclean shutdown. (It
[all …]
|
| /kernel/linux/linux-5.10/Documentation/admin-guide/ |
| 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
[all …]
|
| /kernel/linux/linux-4.19/arch/powerpc/include/asm/ |
| D | vdso_datapage.h | 65 __u64 physicalMemorySize; /* Size of real memory(B) 0x28 */
73 __u32 dcache_size; /* L1 d-cache size 0x60 */
74 __u32 dcache_line_size; /* L1 d-cache line size 0x64 */
75 __u32 icache_size; /* L1 i-cache size 0x68 */
76 __u32 icache_line_size; /* L1 i-cache line size 0x6C */
81 __u32 dcache_block_size; /* L1 d-cache block size */
82 __u32 icache_block_size; /* L1 i-cache block size */
83 __u32 dcache_log_block_size; /* L1 d-cache log block size */
84 __u32 icache_log_block_size; /* L1 i-cache log block size */
113 __u32 dcache_block_size; /* L1 d-cache block size */
[all …]
|
| /kernel/linux/linux-5.10/fs/squashfs/ |
| 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
44 * Locate cache slot in range [offset, index] for specified inode. If
[all …]
|
| 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.
[all …]
|
| /kernel/linux/linux-4.19/fs/squashfs/ |
| D | file.c | 2 * Squashfs - a compressed read only filesystem for Linux
19 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
27 * compressed fragment block (tail-end packed block). The compressed size
28 * of each datablock is stored in a block list contained within the
32 * larger), the code implements an index cache that caches the mapping from
33 * block index to datablock location on disk.
35 * The index cache allows Squashfs to handle large files (up to 1.75 TiB) while
36 * retaining a simple and space-efficient block list on disk. The cache
39 * The index cache is designed to be memory efficient, and by default uses
57 * Locate cache slot in range [offset, index] for specified inode. If
[all …]
|
| D | Kconfig | 2 tristate "SquashFS 4.0 - Squashed file system support"
3 depends on BLOCK
6 Read-Only File System). Squashfs is a highly compressed read-only
10 Block sizes greater than 4K are supported up to a maximum of 1 Mbytes
11 (default block size 128K). SquashFS 4.0 supports 64 bit filesystems
15 Squashfs is intended for general read-only filesystem use, for
34 intermediate buffer and then memcopied it into the page cache.
36 the page cache.
44 memcopy it into the page cache.
47 bool "Decompress files directly into the page cache"
[all …]
|
| /kernel/linux/linux-5.10/Documentation/devicetree/bindings/riscv/ |
| D | sifive-l2-cache.yaml | 1 # SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
4 ---
5 $id: http://devicetree.org/schemas/riscv/sifive-l2-cache.yaml#
6 $schema: http://devicetree.org/meta-schemas/core.yaml#
8 title: SiFive L2 Cache Controller
11 - Sagar Kadam <sagar.kadam@sifive.com>
12 - Yash Shah <yash.shah@sifive.com>
13 - Paul Walmsley <paul.walmsley@sifive.com>
16 The SiFive Level 2 Cache Controller is used to provide access to fast copies
17 of memory for masters in a Core Complex. The Level 2 Cache Controller also
[all …]
|
| /kernel/linux/linux-4.19/Documentation/filesystems/ |
| D | squashfs.txt | 4 Squashfs is a compressed read-only filesystem for Linux.
7 minimise data overhead. Block sizes greater than 4K are supported up to a
8 maximum of 1Mbytes (default block size 128K).
10 Squashfs is intended for general read-only filesystem use, for archival
12 block device/memory systems (e.g. embedded systems) where low overhead is
15 Mailing list: squashfs-devel@lists.sourceforge.net
19 ----------------------
25 Max filesystem size: 2^64 256 MiB
26 Max file size: ~ 2 TiB 16 MiB
30 Max block size: 1 MiB 4 KiB
[all …]
|
| /kernel/linux/linux-4.19/arch/powerpc/kernel/ |
| D | cacheinfo.c | 2 * 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 */
52 /* Allow for both [di]-cache-line-size and
[all …]
|
| /kernel/linux/linux-5.10/drivers/mtd/ |
| 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()
[all …]
|
| /kernel/linux/linux-5.10/Documentation/filesystems/ |
| 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
[all …]
|
| /kernel/linux/linux-5.10/fs/affs/ |
| 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
26 inode->i_ino, atomic_read(&AFFS_I(inode)->i_opencnt)); in affs_file_open()
27 atomic_inc(&AFFS_I(inode)->i_opencnt); in affs_file_open()
35 inode->i_ino, atomic_read(&AFFS_I(inode)->i_opencnt)); in affs_file_release()
37 if (atomic_dec_and_test(&AFFS_I(inode)->i_opencnt)) { in affs_file_release()
39 if (inode->i_size != AFFS_I(inode)->mmu_private) in affs_file_release()
51 struct super_block *sb = inode->i_sb; in affs_grow_extcache()
[all …]
|
| /kernel/linux/linux-4.19/fs/affs/ |
| 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
25 inode->i_ino, atomic_read(&AFFS_I(inode)->i_opencnt)); in affs_file_open()
26 atomic_inc(&AFFS_I(inode)->i_opencnt); in affs_file_open()
34 inode->i_ino, atomic_read(&AFFS_I(inode)->i_opencnt)); in affs_file_release()
36 if (atomic_dec_and_test(&AFFS_I(inode)->i_opencnt)) { in affs_file_release()
38 if (inode->i_size != AFFS_I(inode)->mmu_private) in affs_file_release()
50 struct super_block *sb = inode->i_sb; in affs_grow_extcache()
[all …]
|
| /kernel/linux/linux-4.19/drivers/mtd/ |
| D | mtdblock.c | 2 * Direct MTD block device access
4 * Copyright © 1999-2010 David Woodhouse <dwmw2@infradead.org>
5 * Copyright © 2000-2003 Nicolas Pitre <nico@fluxnic.net>
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
49 * Cache stuff...
52 * buffer cache can handle, we must implement read-modify-write on flash
53 * sectors for each block write requests. To avoid over-erasing flash sectors
54 * and to speed things up, we locally cache a whole flash sector while it is
66 * First, let's erase the flash block. in erase_write()
75 pos, len, mtd->name); in erase_write()
[all …]
|
| /kernel/linux/linux-5.10/arch/powerpc/kernel/ |
| D | cacheinfo.c | 1 // SPDX-License-Identifier: GPL-2.0-only
3 * Processor cache information made available to userspace via sysfs;
27 /* per-cpu object for tracking:
28 * - a "cache" kobject for the top-level directory
29 * - a list of "index" objects representing the cpu's local cache hierarchy
32 struct kobject *kobj; /* bare (not embedded) kobject for cache
37 /* "index" object: each cpu's cache directory has an index
38 * subdirectory corresponding to a cache object associated with the
44 struct cache *cache; member
48 * cache type */
[all …]
|
| /kernel/linux/linux-5.10/arch/riscv/boot/dts/kendryte/ |
| D | k210.dtsi | 1 // SPDX-License-Identifier: GPL-2.0+
6 #include <dt-bindings/clock/k210-clk.h>
10 * Although the K210 is a 64-bit CPU, the address bus is only 32-bits
13 #address-cells = <1>;
14 #size-cells = <1>;
23 * Since this is a non-ratified draft specification, the kernel does not
28 #address-cells = <1>;
29 #size-cells = <0>;
30 timebase-frequency = <7800000>;
36 mmu-type = "none";
[all …]
|
| /kernel/linux/linux-5.10/arch/riscv/kernel/ |
| D | cacheinfo.c | 1 // SPDX-License-Identifier: GPL-2.0-only
22 if (rv_cache_ops && rv_cache_ops->get_priv_group) in cache_get_priv_group()
23 return rv_cache_ops->get_priv_group(this_leaf); in cache_get_priv_group()
32 * that cores have a homonogenous view of the cache hierarchy. That in get_cacheinfo()
33 * happens to be the case for the current set of RISC-V systems, but in get_cacheinfo()
42 for (index = 0; index < this_cpu_ci->num_leaves; index++) { in get_cacheinfo()
43 this_leaf = this_cpu_ci->info_list + index; in get_cacheinfo()
44 if (this_leaf->level == level && this_leaf->type == type) in get_cacheinfo()
55 return this_leaf ? this_leaf->size : 0; in get_cache_size()
62 return this_leaf ? (this_leaf->ways_of_associativity << 16 | in get_cache_geometry()
[all …]
|
| /kernel/linux/linux-5.10/drivers/md/ |
| D | dm-cache-target.c | 8 #include "dm-bio-prison-v2.h"
9 #include "dm-bio-record.h"
10 #include "dm-cache-metadata.h"
12 #include <linux/dm-io.h>
13 #include <linux/dm-kcopyd.h>
22 #define DM_MSG_PREFIX "cache"
25 "A percentage of time allocated for copying to and/or from cache");
27 /*----------------------------------------------------------------*/
32 * oblock: index of an origin block
33 * cblock: index of a cache block
[all …]
|
| /kernel/linux/linux-4.19/drivers/md/ |
| D | dm-cache-target.c | 8 #include "dm-bio-prison-v2.h"
9 #include "dm-bio-record.h"
10 #include "dm-cache-metadata.h"
12 #include <linux/dm-io.h>
13 #include <linux/dm-kcopyd.h>
22 #define DM_MSG_PREFIX "cache"
25 "A percentage of time allocated for copying to and/or from cache");
27 /*----------------------------------------------------------------*/
32 * oblock: index of an origin block
33 * cblock: index of a cache block
[all …]
|