linux/Documentation
Chao Yu 3fde13f817 f2fs: compress: support compress level
Expand 'compress_algorithm' mount option to accept parameter as format of
<algorithm>:<level>, by this way, it gives a way to allow user to do more
specified config on lz4 and zstd compression level, then f2fs compression
can provide higher compress ratio.

In order to set compress level for lz4 algorithm, it needs to set
CONFIG_LZ4HC_COMPRESS and CONFIG_F2FS_FS_LZ4HC config to enable lz4hc
compress algorithm.

CR and performance number on lz4/lz4hc algorithm:

dd if=enwik9 of=compressed_file conv=fsync

Original blocks:	244382

			lz4			lz4hc-9
compressed blocks	170647			163270
compress ratio		69.8%			66.8%
speed			16.4207 s, 60.9 MB/s	26.7299 s, 37.4 MB/s

compress ratio = after / before

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
2021-01-27 15:20:02 -08:00
..
ABI Driver core fixes for 5.11-rc5 2021-01-24 11:05:48 -08:00
accounting
admin-guide dm integrity: conditionally disable "recalculate" feature 2021-01-21 15:05:21 -05:00
arm ARM updates for 5.11: 2020-12-22 13:34:27 -08:00
arm64 ARM: 2020-12-20 10:44:05 -08:00
block
bpf
cdrom
core-api atomic: remove further references to atomic_ops 2020-12-31 15:51:33 -07:00
cpu-freq
crypto
dev-tools kasan: fix HW_TAGS boot parameters 2021-01-24 10:34:52 -08:00
devicetree Staging/IIO fixes for 5.11-rc5 2021-01-24 11:02:01 -08:00
doc-guide Documentation: doc-guide: fixes to sphinx.rst 2020-12-31 15:49:51 -07:00
driver-api RTC for 5.11 2020-12-20 10:12:06 -08:00
fault-injection
fb
features ARM updates for 5.11: 2020-12-22 13:34:27 -08:00
filesystems f2fs: compress: support compress level 2021-01-27 15:20:02 -08:00
firmware_class
firmware-guide Documentation: ACPI: EINJ: Fix error type values for PCIe errors 2021-01-14 13:11:25 +01:00
fpga
gpu
hid Merge branch 'for-5.11/core' into for-linus 2020-12-16 11:38:38 +01:00
hwmon hwmon: (sbtsi_temp) Fix Documenation kernel-doc warning 2020-12-30 08:05:20 -08:00
i2c
ia64 docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
ide
iio
infiniband
input Input: document inhibiting 2020-12-02 22:10:37 -08:00
isdn
kbuild Documentation: kbuild: Fix section reference 2021-01-11 05:14:38 +09:00
kernel-hacking docs: Fix reST markup when linking to sections 2020-12-31 15:44:47 -07:00
leds Changes for 5.11-rc1. Small cleanups/fixes mostly thanks to Marek, 2020-12-16 14:56:29 -08:00
litmus-tests
livepatch
locking Documentation: seqlock: s/LOCKTYPE/LOCKNAME/g 2020-12-09 17:08:49 +01:00
m68k docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
maintainer
mhi
mips docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
misc-devices
netlabel
networking net: Disable NETIF_F_HW_TLS_RX when RXCSUM is disabled 2021-01-19 15:58:05 -08:00
nios2 docs: nios2: add missing ReST file 2020-12-07 08:35:21 -07:00
nvdimm
openrisc docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
parisc docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
PCI
pcmcia
power
powerpc docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
process docs: remove mention of ENABLE_MUST_CHECK 2021-01-07 14:41:38 -07:00
RCU docs: Fix reST markup when linking to sections 2020-12-31 15:44:47 -07:00
riscv docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
s390 docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
scheduler Power management updates for 5.11-rc1 2020-12-15 16:30:31 -08:00
scsi
security
sh docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
sound sound fixes for 5.11-rc4 2021-01-13 11:55:14 -08:00
sparc docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
sphinx Kbuild updates for v5.11 2020-12-22 14:02:39 -08:00
sphinx-static
spi
staging
target tweewide: Fix most Shebang lines 2020-12-08 23:30:04 +09:00
timers
trace Kbuild updates for v5.11 2020-12-22 14:02:39 -08:00
translations Networking updates for 5.11 2020-12-15 13:22:29 -08:00
usb
userspace-api "Intel SGX is new hardware functionality that can be used by 2020-12-14 13:14:57 -08:00
virt KVM: Documentation: Update description of KVM_{GET,CLEAR}_DIRTY_LOG 2021-01-25 18:52:08 -05:00
vm mm/lru: revise the comments of lru_lock 2020-12-15 14:48:04 -08:00
w1
watchdog
x86 A much quieter cycle for documentation (happily), with, one hopes, the bulk 2020-12-14 16:55:54 -08:00
xtensa A much quieter cycle for documentation (happily), with, one hopes, the bulk 2020-12-14 16:55:54 -08:00
.gitignore
asm-annotations.rst
atomic_bitops.txt
atomic_t.txt
Changes
CodingStyle
conf.py docs: Note that sphinx 1.7 will be required soon 2020-12-11 13:53:38 -07:00
COPYING-logo
docutils.conf
dontdiff
index.rst docs: archis: add a per-architecture features list 2020-12-03 15:10:15 -07:00
Kconfig
logo.gif
Makefile
memory-barriers.txt
SubmittingPatches
watch_queue.rst