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| author | Chunhai Guo <guochunhai@vivo.com> | 2024-11-12 21:11:48 -0700 |
|---|---|---|
| committer | Gao Xiang <hsiangkao@linux.alibaba.com> | 2024-11-18 18:50:13 +0800 |
| commit | db80b98305f73ca83891e4228ead5f0324118b00 (patch) | |
| tree | 9a4c714d5e041214608b0a89d04838d6c7db60b7 /Documentation | |
| parent | f5ad9f9a603f829d11ca31a0a4049e16091e8c13 (diff) | |
| download | linux-next-db80b98305f73ca83891e4228ead5f0324118b00.tar.gz linux-next-db80b98305f73ca83891e4228ead5f0324118b00.zip | |
erofs: add sysfs node to drop internal caches
Add a sysfs node to drop compression-related caches, currently used to
drop in-memory pclusters and cached compressed folios.
Signed-off-by: Chunhai Guo <guochunhai@vivo.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20241113041148.749129-1-guochunhai@vivo.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-fs-erofs | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-fs-erofs b/Documentation/ABI/testing/sysfs-fs-erofs index 284224d1b56f..b134146d735b 100644 --- a/Documentation/ABI/testing/sysfs-fs-erofs +++ b/Documentation/ABI/testing/sysfs-fs-erofs @@ -16,3 +16,14 @@ Description: Control strategy of sync decompression: readahead on atomic contexts only. - 1 (force on): enable for readpage and readahead. - 2 (force off): disable for all situations. + +What: /sys/fs/erofs/<disk>/drop_caches +Date: November 2024 +Contact: "Guo Chunhai" <guochunhai@vivo.com> +Description: Writing to this will drop compression-related caches, + currently used to drop in-memory pclusters and cached + compressed folios: + + - 1 : invalidate cached compressed folios + - 2 : drop in-memory pclusters + - 3 : drop in-memory pclusters and cached compressed folios |