f2fs: avoid IO split due to mixed WB_SYNC_ALL and WB_SYNC_NONE

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If two threads try to flush dirty pages in different inodes respectively,
f2fs_write_data_pages() will produce WRITE and WRITE_SYNC one at a time,
resulting in a lot of 4KB seperated IOs.

So, this patch gives higher priority to WB_SYNC_ALL IOs and gathers write
IOs with a big WRITE_SYNC'ed bio.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

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This commit is contained in:

Jaegeuk Kim 2017-03-28 18:07:38 -07:00

parent ef095d19e8

commit 687de7f101

3 changed files with 18 additions and 2 deletions

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15

fs/f2fs/data.c

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3

fs/f2fs/f2fs.h

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2

fs/f2fs/super.c

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