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| author |   Jaegeuk Kim <jaegeuk@kernel.org> | 2015-01-26 17:41:23 -0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2015-02-11 17:04:44 -0800 |
| commit | bba681cbb231920a786cd7303462fb2632af6f36 (patch) | |
| tree | 9937a96f18dec591769f0fc677587148c24fac9e /Documentation | |
| parent | f2fs: merge {invalidate,release}page for meta/node/data pages (diff) | |
| download | linux-dev-bba681cbb231920a786cd7303462fb2632af6f36.tar.xz linux-dev-bba681cbb231920a786cd7303462fb2632af6f36.zip | |
f2fs: introduce a batched trim
This patch introduces a batched trimming feature, which submits split discard
commands.
This is to avoid long latency due to huge trim commands.
If fstrim was triggered ranging from 0 to the end of device, we should lock
all the checkpoint-related mutexes, resulting in very long latency.
Reviewed-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-fs-f2fs | 6 | ||||
| -rw-r--r-- | Documentation/filesystems/f2fs.txt | 4 |
2 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-fs-f2fs b/Documentation/ABI/testing/sysfs-fs-f2fs index 6f9157f16725..2c4cc42006e8 100644 --- a/Documentation/ABI/testing/sysfs-fs-f2fs +++ b/Documentation/ABI/testing/sysfs-fs-f2fs @@ -74,3 +74,9 @@ Date: March 2014 Contact: "Jaegeuk Kim" <jaegeuk.kim@samsung.com> Description: Controls the memory footprint used by f2fs. + +What: /sys/fs/f2fs/<disk>/trim_sections +Date: February 2015 +Contact: "Jaegeuk Kim" <jaegeuk@kernel.org> +Description: + Controls the trimming rate in batch mode. diff --git a/Documentation/filesystems/f2fs.txt b/Documentation/filesystems/f2fs.txt index 6758aa358475..dac11d7fef27 100644 --- a/Documentation/filesystems/f2fs.txt +++ b/Documentation/filesystems/f2fs.txt @@ -199,6 +199,10 @@ Files in /sys/fs/f2fs/<devname> checkpoint is triggered, and issued during the checkpoint. By default, it is disabled with 0. + trim_sections This parameter controls the number of sections + to be trimmed out in batch mode when FITRIM + conducts. 32 sections is set by default. + ipu_policy This parameter controls the policy of in-place updates in f2fs. There are five policies: 0x01: F2FS_IPU_FORCE, 0x02: F2FS_IPU_SSR, |