| /Linux-v5.15/Documentation/vm/ |
| D | zswap.rst | 10 Zswap is a lightweight compressed cache for swap pages. It takes pages that are
14 significant performance improvement if reads from the compressed cache are
34 Zswap evicts pages from compressed cache on an LRU basis to the backing swap
35 device when the compressed pool reaches its size limit. This requirement had
50 back into memory all of the pages stored in the compressed pool. The
51 pages stored in zswap will remain in the compressed pool until they are
53 pages out of the compressed pool, a swapoff on the swap device(s) will
55 compressed pool.
61 evict pages from its own compressed pool on an LRU basis and write them back to
62 the backing swap device in the case that the compressed pool is full.
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| D | z3fold.rst | 7 z3fold is a special purpose allocator for storing compressed pages.
8 It is designed to store up to three compressed pages per physical page.
15 * z3fold can hold up to 3 compressed pages in its page
20 stores an integral number of compressed pages per page, but it can store
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| /Linux-v5.15/Documentation/filesystems/ |
| D | squashfs.rst | 7 Squashfs is a compressed read-only filesystem for Linux.
52 compressed inode is on average 8 bytes in length (the exact length varies on
100 Compressed data blocks are written to the filesystem as files are read from
115 Metadata (inodes and directories) are compressed in 8Kbyte blocks. Each
116 compressed block is prefixed by a two byte length, the top bit is set if the
118 or if the compressed block was larger than the uncompressed block.
121 boundaries, therefore inodes overlap compressed blocks. Inodes are identified
122 by a 48-bit number which encodes the location of the compressed metadata block
138 Like inodes, directories are packed into compressed metadata blocks, stored
146 compressed metadata block, and therefore, can share the start block.
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| /Linux-v5.15/Documentation/userspace-api/media/v4l/ |
| D | pixfmt-reserved.rst | 45 - Compressed format of the ET61X251 driver.
89 - Compressed GBRG Bayer format used by the gspca driver.
94 - Compressed BGGR Bayer format used by the gspca driver.
99 - Compressed BGGR Bayer format used by the gspca driver.
104 - JPEG compressed RGGB Bayer format used by the gspca driver.
124 - Compressed RGB format used by the gspca se401 driver
129 - Compressed RGGB bayer format used by the gspca driver.
134 - Compressed format used by the Zoran driver
139 - Compressed format of the PWC driver.
144 - Compressed format of the PWC driver.
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| D | fourcc.rst | 19 - b: raw bayer, DPCM compressed
20 - a: A-law compressed
21 - u: u-law compressed
32 4th character: compressed bits-per-pixel 0--9, A--
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| D | pixfmt-compressed.rst | 4 Compressed Formats
18 .. flat-table:: Compressed Image Formats
150 - VP8 compressed video frame. The encoder generates one
151 compressed frame per buffer, and the decoder requires one
152 compressed frame per buffer.
172 - VP9 compressed video frame. The encoder generates one
173 compressed frame per buffer, and the decoder requires one
174 compressed frame per buffer.
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| /Linux-v5.15/fs/squashfs/ |
| D | Kconfig | 6 Saying Y here includes support for SquashFS 4.0 (a Compressed
7 Read-Only File System). Squashfs is a highly compressed read-only
112 bool "Include support for ZLIB compressed file systems"
125 bool "Include support for LZ4 compressed file systems"
130 compressed with LZ4 compression. LZ4 compression is mainly
140 bool "Include support for LZO compressed file systems"
145 compressed with LZO compression. LZO compression is mainly
155 bool "Include support for XZ compressed file systems"
160 compressed with XZ compression. XZ gives better compression than
170 bool "Include support for ZSTD compressed file systems"
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| D | fragment.c | 3 * Squashfs - a compressed read only filesystem for Linux
12 * This file implements code to handle compressed fragments (tail-end packed
16 * location on disk and compressed size using a fragment lookup table.
18 * compressed into metadata blocks. A second index table is used to locate
33 * location of the fragment and its compressed size
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| D | block.c | 3 * Squashfs - a compressed read only filesystem for Linux
146 int compressed; in squashfs_read_data() local
154 compressed = SQUASHFS_COMPRESSED_BLOCK(length); in squashfs_read_data()
157 index, compressed ? "" : "un", length, output->length); in squashfs_read_data()
194 compressed = SQUASHFS_COMPRESSED(length); in squashfs_read_data()
199 compressed ? "" : "un", length); in squashfs_read_data()
214 if (compressed) { in squashfs_read_data()
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| /Linux-v5.15/Documentation/networking/ |
| D | ipsec.rst | 12 Small IP packet won't get compressed at sender, and failed on
19 If the total size of a compressed payload and the IPComp header, as
21 payload, the IP datagram MUST be sent in the original non-compressed
22 form. To clarify: If an IP datagram is sent non-compressed, no
36 when sending non-compressed packet to the peer (whether or not packet len
37 is smaller than the threshold or the compressed len is larger than original
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| /Linux-v5.15/fs/btrfs/ |
| D | lzo.c | 24 * Regular and inlined LZO compressed data extents consist of:
28 * Records the total size (including the header) of compressed data.
33 * One regular LZO compressed extent can have one or more segments.
34 * For inlined LZO compressed extent, only one segment is allowed.
61 void *cbuf; /* where compressed data goes */
147 * store the size of all chunks of compressed data in in lzo_compress_pages()
174 /* store the size of this chunk of compressed data */ in lzo_compress_pages()
261 /* store the size of all chunks of compressed data */ in lzo_compress_pages()
283 * Copy the compressed segment payload into @dest.
318 /* Compressed data length, can be unaligned */ in lzo_decompress_bio()
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| /Linux-v5.15/usr/ |
| D | Kconfig | 56 bool "Support initial ramdisk/ramfs compressed using gzip"
64 bool "Support initial ramdisk/ramfs compressed using bzip2"
72 bool "Support initial ramdisk/ramfs compressed using LZMA"
80 bool "Support initial ramdisk/ramfs compressed using XZ"
88 bool "Support initial ramdisk/ramfs compressed using LZO"
96 bool "Support initial ramdisk/ramfs compressed using LZ4"
104 bool "Support initial ramdisk/ramfs compressed using ZSTD"
116 initramfs will be compressed. Several compression algorithms are
223 compressed at a later stage anyways along with the rest of the kernel,
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| /Linux-v5.15/Documentation/sound/designs/ |
| D | compress-offload.rst | 15 extend the existing API to compressed data streams.
19 codecs. Processing compressed data on such DSPs results in a dramatic
26 ALSA PCM interface, a new 'Compressed Data' API is introduced to
39 - separation between byte counts and time. Compressed formats may have
43 compressed data. Dedicated mechanisms are required to allow for
49 contrast, compressed data comes in a variety of formats. Audio DSPs
68 streaming compressed data to a DSP, with the assumption that the
72 have existing enums/structures for each compressed format. This new
94 The Compressed Data API does not make any assumptions on how the data
157 The compressed audio stream state machine is described below ::
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| /Linux-v5.15/arch/ia64/ |
| D | Makefile | 53 PHONY += compressed check
55 all: compressed unwcheck
57 compressed: vmlinux.gz target
81 echo '* compressed - Build compressed kernel image'
82 echo ' install - Install compressed kernel image'
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| /Linux-v5.15/arch/parisc/boot/ |
| D | Makefile | 8 subdir- := compressed
13 $(obj)/bzImage: $(obj)/compressed/vmlinux FORCE
16 $(obj)/compressed/vmlinux: FORCE
17 $(Q)$(MAKE) $(build)=$(obj)/compressed $@
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| /Linux-v5.15/fs/jffs2/ |
| D | compr.c | 63 * @cpage_out: Pointer to returned pointer to buffer for compressed data
65 * On exit, expected to hold the amount of data actually compressed.
66 * @cdatalen: On entry, holds the amount of space available for compressed
67 * data. On exit, expected to hold the actual size of the compressed
71 * could not be compressed; probably because we couldn't find the requested
132 * @cpage_out: Pointer to returned pointer to buffer for compressed data
134 * On exit, expected to hold the amount of data actually compressed.
135 * @cdatalen: On entry, holds the amount of space available for compressed
136 * data. On exit, expected to hold the actual size of the compressed
140 * Zero is used to show that the data could not be compressed - the
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| /Linux-v5.15/include/linux/ |
| D | lz4.h | 178 * @dest: output buffer address of the compressed data
203 * @dest: output buffer address of the compressed data
228 * @dest: output buffer address of the compressed data
254 * @source: source address of the compressed data
261 * compressed data.
275 * @source: source address of the compressed data
278 * @compressedSize: is the precise full size of the compressed block
298 * @source: source address of the compressed data
301 * @compressedSize: is the precise full size of the compressed block.
306 * This function decompresses a compressed block of size 'compressedSize'
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| /Linux-v5.15/lib/xz/ |
| D | xz_dec_stream.c | 63 * Value stored in the Compressed Size field, or
64 * VLI_UNKNOWN if Compressed Size is not present.
66 vli_type compressed; member
80 /* Observed compressed size of the current Block */
81 vli_type compressed; member
207 * Decode the Compressed Data field from a Block. Update and validate
208 * the observed compressed and uncompressed sizes of the Block so that
232 s->block.compressed += b->in_pos - s->in_start; in dec_block()
239 if (s->block.compressed > s->block_header.compressed in dec_block()
249 if (s->block_header.compressed != VLI_UNKNOWN in dec_block()
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| /Linux-v5.15/drivers/media/test-drivers/vicodec/ |
| D | codec-fwht.h | 15 * The compressed format consists of a fwht_cframe_hdr struct followed by the
16 * compressed frame data. The header contains the size of that data.
17 * Each Y, Cb and Cr plane is compressed separately. If the compressed
22 * Each compressed plane consists of macroblocks and each macroblock
39 * guaranteed not to occur in the compressed frame data. This header
|
| /Linux-v5.15/arch/h8300/boot/ |
| D | Makefile | 5 subdir- := compressed
18 $(obj)/zImage: $(obj)/compressed/vmlinux FORCE
21 $(obj)/compressed/vmlinux: FORCE
22 $(Q)$(MAKE) $(build)=$(obj)/compressed $@
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| /Linux-v5.15/tools/perf/tests/shell/ |
| D | record+zstd_comp_decomp.sh | 14 echo "Collecting compressed record file:"
21 echo "Checking compressed events stats:"
23 grep -E "(# compressed : Zstd,)|(COMPRESSED events:)"
|
| /Linux-v5.15/include/uapi/linux/ |
| D | ppp_defs.h | 42 #define PPP_VJC_COMP 0x2d /* VJ compressed TCP */
46 #define PPP_COMPFRAG 0xfb /* fragment compressed below bundle */
47 #define PPP_COMP 0xfd /* compressed packet */
108 __u32 vjs_compressed; /* outbound compressed packets */
112 __u32 vjs_compressedin; /* inbound compressed packets */
120 __u32 comp_bytes; /* compressed bytes */
121 __u32 comp_packets; /* compressed packets */
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| /Linux-v5.15/arch/s390/boot/ |
| D | Makefile | 45 subdir- := compressed
62 $(obj)/bzImage: $(obj)/compressed/vmlinux $(obj)/section_cmp.boot.data $(obj)/section_cmp.boot.pres…
65 $(obj)/section_cmp%: vmlinux $(obj)/compressed/vmlinux FORCE
68 $(obj)/compressed/vmlinux: $(obj)/startup.a FORCE
69 $(Q)$(MAKE) $(build)=$(obj)/compressed $@
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| /Linux-v5.15/arch/mips/ |
| D | Kconfig.debug | 83 bool "Enable compressed kernel support debugging"
87 If you want to add compressed kernel support to a new board, and the
95 arch/mips/boot/compressed/uart-16550.c does.
97 After the compressed kernel support works, please disable this option
102 int "UART to use for compressed kernel debugging"
107 Specify the UART that should be used for compressed kernel debugging.
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| /Linux-v5.15/mm/ |
| D | Kconfig | 532 bool "Compressed cache for swap pages (EXPERIMENTAL)"
536 A lightweight compressed cache for swap pages. It takes
550 prompt "Compressed cache for swap pages default compressor"
554 Selects the default compression algorithm for the compressed cache
616 prompt "Compressed cache for swap pages default allocator"
620 Selects the default allocator for the compressed cache for
657 bool "Enable the compressed cache for swap pages by default"
660 If selected, the compressed cache for swap pages will be enabled
667 tristate "Common API for compressed memory storage"
669 Compressed memory storage API. This allows using either zbud or
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