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| author |   Hyunchul Lee <cheol.lee@lge.com> | 2018-01-31 11:36:58 +0900 |
|---|---|---|
| committer |   Jaegeuk Kim <jaegeuk@kernel.org> | 2018-03-13 08:05:36 +0900 |
| commit | f2e703f9a3caa91e4f3f0a8f5d3fe92dbea05623 (patch) | |
| tree | 3d9ea8f32f7a00acc87eb544ddaea8ec4dfef962 /Documentation/filesystems | |
| parent | f2fs: support passing down write hints given by users to block layer (diff) | |
| download | linux-dev-f2e703f9a3caa91e4f3f0a8f5d3fe92dbea05623.tar.xz linux-dev-f2e703f9a3caa91e4f3f0a8f5d3fe92dbea05623.zip | |
f2fs: support passing down write hints to block layer with F2FS policy
Add 'whint_mode=fs-based' mount option. In this mode, F2FS passes
down write hints with its policy.
* whint_mode=fs-based. F2FS passes down hints with its policy.
User F2FS Block
---- ---- -----
META WRITE_LIFE_MEDIUM;
HOT_NODE WRITE_LIFE_NOT_SET
WARM_NODE "
COLD_NODE WRITE_LIFE_NONE
ioctl(COLD) COLD_DATA WRITE_LIFE_EXTREME
extension list " "
-- buffered io
WRITE_LIFE_EXTREME COLD_DATA WRITE_LIFE_EXTREME
WRITE_LIFE_SHORT HOT_DATA WRITE_LIFE_SHORT
WRITE_LIFE_NOT_SET WARM_DATA WRITE_LIFE_LONG
WRITE_LIFE_NONE " "
WRITE_LIFE_MEDIUM " "
WRITE_LIFE_LONG " "
-- direct io
WRITE_LIFE_EXTREME COLD_DATA WRITE_LIFE_EXTREME
WRITE_LIFE_SHORT HOT_DATA WRITE_LIFE_SHORT
WRITE_LIFE_NOT_SET WARM_DATA WRITE_LIFE_NOT_SET
WRITE_LIFE_NONE " WRITE_LIFE_NONE
WRITE_LIFE_MEDIUM " WRITE_LIFE_MEDIUM
WRITE_LIFE_LONG " WRITE_LIFE_LONG
Many thanks to Chao Yu and Jaegeuk Kim for comments to
implement this patch.
Signed-off-by: Hyunchul Lee <cheol.lee@lge.com>
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'Documentation/filesystems')
0 files changed, 0 insertions, 0 deletions