diff options
| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-03-29 04:07:38 +0300 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2017-04-05 21:05:06 +0300 |
| commit | 687de7f1010cb819d04b768556960d3689abe02b (patch) | |
| tree | c32a4ccac2d084d51e2074e7184598bf4cd37349 /fs/f2fs/f2fs.h | |
| parent | ef095d19e82f25bbdead472b8b71f4ef3b7a636d (diff) | |
| download | linux-687de7f1010cb819d04b768556960d3689abe02b.tar.xz | |
f2fs: avoid IO split due to mixed WB_SYNC_ALL and WB_SYNC_NONE
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>
Diffstat (limited to 'fs/f2fs/f2fs.h')
| -rw-r--r-- | fs/f2fs/f2fs.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h index fc90e5317159..cca46e0ff2e4 100644 --- a/fs/f2fs/f2fs.h +++ b/fs/f2fs/f2fs.h @@ -887,6 +887,9 @@ struct f2fs_sb_info { /* # of allocated blocks */ struct percpu_counter alloc_valid_block_count; + /* writeback control */ + atomic_t wb_sync_req; /* count # of WB_SYNC threads */ + /* valid inode count */ struct percpu_counter total_valid_inode_count; |