diff options
| author | Gao Xiang <hsiangkao@linux.alibaba.com> | 2026-01-12 11:43:30 +0800 |
|---|---|---|
| committer | Gao Xiang <hsiangkao@linux.alibaba.com> | 2026-01-23 00:05:11 +0800 |
| commit | cc831ab33644088c1eef78936de24701014d520a (patch) | |
| tree | b86c856c22d954c9e0038a33f690659fff296e47 /Documentation/ABI | |
| parent | 06e5c340941fba1c7a2da95ee64d9cae6154bd6e (diff) | |
| download | linux-next-cc831ab33644088c1eef78936de24701014d520a.tar.gz linux-next-cc831ab33644088c1eef78936de24701014d520a.zip | |
erofs: tidy up synchronous decompression
- Get rid of `sbi->opt.max_sync_decompress_pages` since it's fixed as
3 all the time;
- Add Z_EROFS_MAX_SYNC_DECOMPRESS_BYTES in bytes instead of in pages,
since for non-4K pages, 3-page limitation makes no sense;
- Move `sync_decompress` to sbi to avoid unexpected remount impact;
- Fold z_erofs_is_sync_decompress() into its caller;
- Better description of sysfs entry `sync_decompress`.
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-fs-erofs | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/Documentation/ABI/testing/sysfs-fs-erofs b/Documentation/ABI/testing/sysfs-fs-erofs index 76d9808ed581..b9243c7f28d7 100644 --- a/Documentation/ABI/testing/sysfs-fs-erofs +++ b/Documentation/ABI/testing/sysfs-fs-erofs @@ -10,12 +10,16 @@ Description: Shows all enabled kernel features. What: /sys/fs/erofs/<disk>/sync_decompress Date: November 2021 Contact: "Huang Jianan" <huangjianan@oppo.com> -Description: Control strategy of sync decompression: +Description: Control strategy of synchronous decompression. Synchronous + decompression tries to decompress in the reader thread for + synchronous reads and small asynchronous reads (<= 12 KiB): - - 0 (default, auto): enable for readpage, and enable for - readahead on atomic contexts only. - - 1 (force on): enable for readpage and readahead. - - 2 (force off): disable for all situations. + - 0 (auto, default): apply to synchronous reads only, but will + switch to 1 (force on) if any decompression + request is detected in atomic contexts; + - 1 (force on): apply to synchronous reads and small + asynchronous reads; + - 2 (force off): disable synchronous decompression completely. What: /sys/fs/erofs/<disk>/drop_caches Date: November 2024 |