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| author | Chao Yu <chao2.yu@samsung.com> | 2014-07-03 18:58:39 +0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2014-07-30 23:28:37 -0700 |
| commit | b3582c68920105e29d219714d8a6fbde25a43379 (patch) | |
| tree | 200ab9ca194921c8baad9954fee36eee072a772f /fs/f2fs/node.c | |
| parent | 65b85ccce03f17b3098273192b20885f3fead820 (diff) | |
| download | linux-b3582c68920105e29d219714d8a6fbde25a43379.tar.bz2 | |
f2fs: reduce competition among node page writes
We do not need to block on ->node_write among different node page writers e.g.
fsync/flush, unless we have a node page writer from write_checkpoint.
So it's better use rw_semaphore instead of mutex type for ->node_write to
promote performance.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/node.c')
| -rw-r--r-- | fs/f2fs/node.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c index a90f51d32482..7b5b5def65fe 100644 --- a/fs/f2fs/node.c +++ b/fs/f2fs/node.c @@ -1231,12 +1231,12 @@ static int f2fs_write_node_page(struct page *page, if (wbc->for_reclaim) goto redirty_out; - mutex_lock(&sbi->node_write); + down_read(&sbi->node_write); set_page_writeback(page); write_node_page(sbi, page, &fio, nid, ni.blk_addr, &new_addr); set_node_addr(sbi, &ni, new_addr, is_fsync_dnode(page)); dec_page_count(sbi, F2FS_DIRTY_NODES); - mutex_unlock(&sbi->node_write); + up_read(&sbi->node_write); unlock_page(page); return 0; |