| /linux/net/6lowpan/ |
| H A D | Kconfig | 22 Support for next header and generic header compression defined in
31 6LoWPAN IPv6 Destination Options Header compression according to
38 6LoWPAN IPv6 Fragment Header compression according to RFC6282.
44 6LoWPAN IPv6 Hop-by-Hop Options Header compression according to
51 6LoWPAN IPv6 Header compression according to RFC6282.
57 6LoWPAN IPv6 Mobility Header compression according to RFC6282.
63 6LoWPAN IPv6 Routing Header compression according to RFC6282.
69 6LoWPAN IPv6 UDP Header compression according to RFC6282.
74 6LoWPAN IPv6 Hop-by-Hop option generic header compression according
80 6LoWPAN IPv6 UDP generic header compression according to RFC7400.
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| /linux/drivers/media/usb/pwc/ |
| H A D | pwc-ctrl.c | 142 int frames, int *compression, int send_to_cam) in set_video_mode_Nala() argument
210 *compression = 3; in set_video_mode_Nala()
217 int frames, int *compression, int send_to_cam) in set_video_mode_Timon() argument
222 if (size >= PSZ_MAX || *compression < 0 || *compression > 3) in set_video_mode_Timon()
234 pChoose = &Timon_table[size][fps][*compression]; in set_video_mode_Timon()
237 (*compression)++; in set_video_mode_Timon()
238 } while (*compression <= 3); in set_video_mode_Timon()
268 int frames, int *compression, int send_to_cam) in set_video_mode_Kiara() argument
273 if (size >= PSZ_MAX || *compression < 0 || *compression > 3) in set_video_mode_Kiara()
285 pChoose = &Kiara_table[size][fps][*compression]; in set_video_mode_Kiara()
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| /linux/arch/powerpc/boot/ |
| H A D | wrapper | 47 compression=.gz
145 compression=.gz
153 compression=".$1"
156 if [ $compression = ".none" ]; then
157 compression=
167 compression=
293 compression=
324 compression=
395 if [ -z "$cacheit" -o ! -f "$vmz$compression" -o "$vmz$compression" -ot "$kernel" ]; then
397 case $compression in
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| /linux/fs/jffs2/ |
| H A D | Kconfig | 9 levelling, compression and support for hard links. You cannot use
101 bool "Advanced compression options for JFFS2"
106 compression modules, if any, are enabled in JFFS2. Removing
114 bool "JFFS2 ZLIB compression support" if JFFS2_COMPRESSION_OPTIONS
121 lossless data-compression library for use on virtually any computer
128 bool "JFFS2 LZO compression support" if JFFS2_COMPRESSION_OPTIONS
134 minilzo-based compression. Generally works better than Zlib.
140 bool "JFFS2 RTIME compression support" if JFFS2_COMPRESSION_OPTIONS
147 bool "JFFS2 RUBIN compression support" if JFFS2_COMPRESSION_OPTIONS
154 prompt "JFFS2 default compression mode"
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| /linux/fs/squashfs/ |
| H A D | Kconfig | 8 filesystem for Linux. It uses zlib, lz4, lzo, xz or zstd compression
91 If in doubt, select "Single threaded compression"
94 bool "Single threaded compression"
179 ZLIB compression is the standard compression used by Squashfs
180 file systems. It offers a good trade-off between compression
192 compressed with LZ4 compression. LZ4 compression is mainly
196 LZ4 is not the standard compression used in Squashfs and so most
207 compressed with LZO compression. LZO compression is mainly
211 LZO is not the standard compression used in Squashfs and so most
222 compressed with XZ compression. XZ gives better compression than
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| /linux/Documentation/admin-guide/blockdev/ |
| H A D | zram.rst | 10 in memory itself. These disks allow very fast I/O and compression provides
76 2) Select compression algorithm
80 currently selected (shown in square brackets) compression algorithms,
81 or change the selected compression algorithm (once the device is initialised
82 there is no way to change compression algorithm).
86 #show supported compression algorithms
90 #select lzo compression algorithm
93 For the time being, the `comp_algorithm` content shows only compression
96 3) Set compression algorithm parameters: Optional
103 For example, several compression algorithms support `level` parameter.
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| /linux/Documentation/userspace-api/media/drivers/ |
| H A D | aspeed-video.rst | 9 video compressions with a wide range of video quality and compression ratio
14 * JPEG JFIF standard mode: for single frame and management compression
15 * ASPEED proprietary mode: for multi-frame and differential compression.
16 Support 2-pass (high quality) video compression scheme (Patent pending by
17 ASPEED). Provide visually lossless video compression quality or to reduce
48 that can be used to decide compression quality if High quality mode enabled
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| /linux/usr/ |
| H A D | Kconfig | 112 prompt "Built-in initramfs compression mode"
116 initramfs will be compressed. Several compression algorithms are
117 available, which differ in efficiency, compression and
125 High compression options are mostly useful for users who are
130 compression tool to compress the generated initram cpio file for
139 Use the old and well tested gzip compression algorithm. Gzip provides
140 a good balance between compression ratio and decompression speed and
141 has a reasonable compression speed. It is also more likely to be
149 It's compression ratio and speed is intermediate. Decompression speed
162 This algorithm's compression ratio is best but has a large dictionary
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| /linux/fs/bcachefs/ |
| H A D | compress.c | 339 struct bch_compression_opt compression) in attempt_compress() argument
342 __bch2_compression_opt_to_type[compression.type]; in attempt_compress()
346 if (compression.level < LZ4HC_MIN_CLEVEL) { in attempt_compress()
360 compression.level, in attempt_compress()
375 compression.level in attempt_compress()
376 ? clamp_t(unsigned, compression.level, in attempt_compress()
396 unsigned level = min((compression.level * 3) / 2, zstd_max_clevel()); in attempt_compress()
429 struct bch_compression_opt compression) in __bio_compress() argument
434 __bch2_compression_opt_to_type[compression.type]; in __bio_compress()
439 BUG_ON(compression.type >= BCH_COMPRESSION_OPT_NR); in __bio_compress()
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| /linux/fs/f2fs/ |
| H A D | Kconfig | 96 bool "F2FS compression feature"
99 Enable filesystem-level compression on f2fs regular files,
100 multiple back-end compression algorithms are supported.
103 bool "LZO compression support"
110 bool "LZO-RLE compression support"
117 bool "LZ4 compression support"
124 bool "LZ4HC compression support"
132 bool "ZSTD compression support"
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| /linux/drivers/net/ppp/ |
| H A D | Kconfig | 39 tristate "PPP BSD-Compress compression"
42 Support for the BSD-Compress compression method for PPP, which uses
43 the LZW compression method to compress each PPP packet before it is
45 (usually your ISP) has to support the BSD-Compress compression
49 The PPP Deflate compression method ("PPP Deflate compression",
53 Note that the BSD compression code will always be compiled as a
58 tristate "PPP Deflate compression"
63 Support for the Deflate compression method for PPP, which uses the
67 Deflate compression method as well for this to be useful. Even if
86 tristate "PPP MPPE compression (encryption)"
|
| /linux/Documentation/staging/ |
| H A D | xz.rst | 4 XZ data compression in Linux
10 XZ is a general purpose data compression format with high compression
19 For userspace, `XZ Utils`_ provide a zlib-like compression library
50 Notes on compression options
81 For the best compression, the dictionary should be at least
85 The compression presets in XZ Utils may not be optimal when creating
|
| /linux/drivers/net/ethernet/asix/ |
| H A D | Kconfig | 23 bool "SPI transfer compression"
27 Say Y here to enable SPI transfer compression. It saves up
31 changed at run time via spi-compression ethtool tunable.
|
| /linux/fs/ubifs/ |
| H A D | Kconfig | 23 bool "Advanced compression options"
32 bool "LZO compression support" if UBIFS_FS_ADVANCED_COMPR
39 bool "ZLIB compression support" if UBIFS_FS_ADVANCED_COMPR
45 bool "ZSTD compression support" if UBIFS_FS_ADVANCED_COMPR
50 in compression ratio over LZO. Say 'Y' if unsure.
|
| /linux/Documentation/admin-guide/media/ |
| H A D | philips.rst | 95 compression (only useful with the plugin)
96 With this option you can control the compression factor that the camera
102 compression.
103 1 = low compression.
104 2 = medium compression.
105 3 = high compression.
107 High compression takes less bandwidth of course, but it could also
108 introduce some unwanted artefacts. The default is 2, medium compression.
110 compression.
112 The compression parameter does not apply to the 645 and 646 cameras
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| /linux/arch/mips/generic/ |
| H A D | board-ocelot.its.S | 9 compression = "none"; define
20 compression = "none"; define
|
| H A D | board-jaguar2.its.S | 9 compression = "none"; define
19 compression = "none"; define
|
| /linux/fs/erofs/ |
| H A D | Kconfig | 26 It also provides transparent compression and deduplication support to
27 improve storage density and maintain relatively high compression
108 Enable transparent compression support for EROFS file systems.
110 If you don't want to enable compression feature, say N.
118 gives better compression ratios than the default LZ4 format, at the
128 containing DEFLATE compressed data. It gives better compression
142 containing Zstandard compressed data. It gives better compression
|
| /linux/drivers/crypto/nx/ |
| H A D | Kconfig | 21 Support for PowerPC Nest (NX) compression acceleration. This
35 Support for PowerPC Nest (NX) compression acceleration. This
46 Support for PowerPC Nest (NX) compression acceleration. This
|
| /linux/drivers/md/dm-vdo/ |
| H A D | Kconfig | 4 tristate "VDO: deduplication and compression target"
13 deduplication, compression and thin-provisioning.
|
| /linux/drivers/crypto/intel/iaa/ |
| H A D | Kconfig | 7 This driver supports acceleration for compression and
17 Enable statistics for the IAA compression accelerator.
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| /linux/drivers/gpu/drm/gud/ |
| H A D | gud_pipe.c | 159 u8 compression = gdrm->compression; in gud_prep_flush() local
171 if (compression) in gud_prep_flush()
205 } else if (compression && cached_reads && pitch == fb->pitches[0]) { in gud_prep_flush()
219 if (compression & GUD_COMPRESSION_LZ4) { in gud_prep_flush()
224 compression = 0; in gud_prep_flush()
228 req->compression = GUD_COMPRESSION_LZ4; in gud_prep_flush()
291 if (req.compression) in gud_flush_rect()
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| /linux/Documentation/networking/ |
| H A D | ipsec.rst | 29 Small IP datagrams are likely to expand as a result of compression.
30 Therefore, a numeric threshold should be applied before compression,
32 original form without attempting compression. The numeric threshold
|
| /linux/scripts/ |
| H A D | Makefile.debug | 38 DEBUG_RUSTFLAGS += -Zdebuginfo-compression=zlib
43 DEBUG_RUSTFLAGS += -Zdebuginfo-compression=zstd
|
| /linux/Documentation/filesystems/ |
| H A D | f2fs.rst | 300 compression on those corresponding files, e.g. if all files
301 with '.ext' has high compression rate, we can set the '.ext'
302 on compression extension list and enable compression on
304 For other files, we can still enable compression via ioctl.
306 can be set to enable compression for all files.
308 compression on those corresponding files, just contrary to compression extension.
317 See more in compression sections.
320 compress_mode=%s Control file compression mode. This supports "fs" and "user"
321 modes. In "fs" mode (default), f2fs does automatic compression
322 on the compression enabled files. In "user" mode, f2fs disables
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