linux-dev/fs/f2fs/Kconfig, branch master

f2fs: introduce F2FS_UNFAIR_RWSEM to support unfair rwsem

2022-03-04T17:15:53Z

Unfair rwsem should be used when blk-cg is on. Otherwise, there is regression. FYI, we noticed a -26.7% regression of aim7.jobs-per-min due to commit: commit: e4544b63a7ee49e7fbebf35ece0a6acd3b9617ae ("f2fs: move f2fs to use reader-unfair rwsems") https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master in testcase: aim7 on test machine: 88 threads 2 sockets Intel(R) Xeon(R) Gold 6238M CPU @ 2.10GHz with 128G memory with following parameters: disk: 4BRD_12G md: RAID0 fs: f2fs test: sync_disk_rw load: 100 cpufreq_governor: performance ucode: 0x500320a test-description: AIM7 is a traditional UNIX system level benchmark suite which is used to test and measure the performance of multiuser system. test-url: https://sourceforge.net/projects/aimbench/files/aim-suite7/ Reported-by: kernel test robot Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: implement iomap operations

2021-12-04T18:53:35Z

Implement 'struct iomap_ops' for f2fs, in preparation for making f2fs use iomap for direct I/O. Note that this may be used for other things besides direct I/O in the future; however, for now I've only tested it for direct I/O. Signed-off-by: Eric Biggers Signed-off-by: Jaegeuk Kim

f2fs: separate out iostat feature

2021-08-23T17:25:51Z

Added F2FS_IOSTAT config option to support getting IO statistics through sysfs and printing out periodic IO statistics tracepoint events and moved I/O statistics related codes into separate files for better maintenance. Signed-off-by: Daeho Jeong Reviewed-by: Chao Yu [Jaegeuk Kim: set default=y] Signed-off-by: Jaegeuk Kim

f2fs: Kconfig: clean up config options about compression

2021-08-05T17:46:58Z

In fs/f2fs/Kconfig, F2FS_FS_LZ4HC depends on F2FS_FS_LZ4 and F2FS_FS_LZ4 depends on F2FS_FS_COMPRESSION, so no need to make F2FS_FS_LZ4HC depends on F2FS_FS_COMPRESSION explicitly, remove the redudant "depends on", do the similar thing for F2FS_FS_LZORLE. At the same time, it is better to move F2FS_FS_LZORLE next to F2FS_FS_LZO, it looks like a little more clear when make menuconfig, the location of "LZO-RLE compression support" is under "LZO compression support" instead of "F2FS compression feature". Without this patch: F2FS compression feature LZO compression support LZ4 compression support LZ4HC compression support ZSTD compression support LZO-RLE compression support With this patch: F2FS compression feature LZO compression support LZO-RLE compression support LZ4 compression support LZ4HC compression support ZSTD compression support Signed-off-by: Tiezhu Yang Reviewed-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: compress: Allow modular (de)compression algorithms

2021-03-12T21:16:42Z

If F2FS_FS is modular, enabling the compressions options F2FS_FS_{LZ4,LZ4HZ,LZO,LZORLE,ZSTD} will make the (de)compression algorithms {LZ4,LZ4HC,LZO,ZSTD}_{,DE}COMPRESS builtin instead of modular, as the former depend on an intermediate boolean F2FS_FS_COMPRESSION, which in-turn depends on tristate F2FS_FS. Indeed, if a boolean symbol A depends directly on a tristate symbol B and selects another tristate symbol C: tristate B tristate C bool A depends on B select C and B is modular, then C will also be modular. However, if there is an intermediate boolean D in the dependency chain between A and B: tristate B tristate C bool D depends on B bool A depends on D select C then the modular state won't propagate from B to C, and C will be builtin instead of modular. As modular dependency propagation through intermediate symbols is obscure, fix this in a robust way by moving the selection of tristate (de)compression algorithms from the boolean compression options to the tristate main F2FS_FS option. Signed-off-by: Geert Uytterhoeven Reviewed-by: Chao Yu Reviewed-by: Masahiro Yamada Signed-off-by: Jaegeuk Kim

f2fs: deprecate f2fs_trace_io

2021-01-27T23:20:07Z

This patch deprecates f2fs_trace_io, since f2fs uses page->private more broadly, resulting in more buggy cases. Acked-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: compress: support compress level

2021-01-27T23:20:02Z

Expand 'compress_algorithm' mount option to accept parameter as format of :, 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 Signed-off-by: Jaegeuk Kim

f2fs: compress: support lzo-rle compress algorithm

2020-05-12T03:36:46Z

LZO-RLE extension (run length encoding) was introduced to improve performance of LZO algorithm in scenario of data contains many zeros, zram has changed to use this extended algorithm by default, this patch adds to support this algorithm extension, to enable this extension, it needs to enable F2FS_FS_LZO and F2FS_FS_LZORLE config, and specifies "compress_algorithm=lzo-rle" mountoption. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

f2fs: compress: support zstd compress algorithm

2020-04-03T17:21:10Z

Add zstd compress algorithm support, use "compress_algorithm=zstd" mountoption to enable it. Signed-off-by: Chao Yu Signed-off-by: Jaegeuk Kim

Merge tag 'f2fs-for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs

2020-01-30T23:39:24Z

Pull f2fs updates from Jaegeuk Kim: "In this series, we've implemented transparent compression experimentally. It supports LZO and LZ4, but will add more later as we investigate in the field more. At this point, the feature doesn't expose compressed space to user directly in order to guarantee potential data updates later to the space. Instead, the main goal is to reduce data writes to flash disk as much as possible, resulting in extending disk life time as well as relaxing IO congestion. Alternatively, we're also considering to add ioctl() to reclaim compressed space and show it to user after putting the immutable bit. Enhancements: - add compression support - avoid unnecessary locks in quota ops - harden power-cut scenario for zoned block devices - use private bio_set to avoid IO congestion - replace GC mutex with rwsem to serialize callers Bug fixes: - fix dentry consistency and memory corruption in rename()'s error case - fix wrong swap extent reports - fix casefolding bugs - change lock coverage to avoid deadlock - avoid GFP_KERNEL under f2fs_lock_op And, we've cleaned up sysfs entries to prepare no debugfs" * tag 'f2fs-for-5.6' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (31 commits) f2fs: fix race conditions in ->d_compare() and ->d_hash() f2fs: fix dcache lookup of !casefolded directories f2fs: Add f2fs stats to sysfs f2fs: delete duplicate information on sysfs nodes f2fs: change to use rwsem for gc_mutex f2fs: update f2fs document regarding to fsync_mode f2fs: add a way to turn off ipu bio cache f2fs: code cleanup for f2fs_statfs_project() f2fs: fix miscounted block limit in f2fs_statfs_project() f2fs: show the CP_PAUSE reason in checkpoint traces f2fs: fix deadlock allocating bio_post_read_ctx from mempool f2fs: remove unneeded check for error allocating bio_post_read_ctx f2fs: convert inline_dir early before starting rename f2fs: fix memleak of kobject f2fs: fix to add swap extent correctly f2fs: run fsck when getting bad inode during GC f2fs: support data compression f2fs: free sysfs kobject f2fs: declare nested quota_sem and remove unnecessary sems f2fs: don't put new_page twice in f2fs_rename ...