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| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2016-06-30 18:49:15 -0700 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2016-07-08 10:33:29 -0700 |
| commit | 237c0790e54020d522b8fd23097e8dcafb4e331d (patch) | |
| tree | 57af2ddd9bff9382d6330ca894497d3fb37bfb2e /fs/f2fs/file.c | |
| parent | fe76b796fc5194cc3d57265002e3a748566d073f (diff) | |
| download | lwn-237c0790e54020d522b8fd23097e8dcafb4e331d.tar.gz lwn-237c0790e54020d522b8fd23097e8dcafb4e331d.zip | |
f2fs: call SetPageUptodate if needed
SetPageUptodate() issues memory barrier, resulting in performance degrdation.
Let's avoid that.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/file.c')
| -rw-r--r-- | fs/f2fs/file.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index d07e7759f970..2b777a42bf43 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -81,7 +81,8 @@ static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma, zero_user_segment(page, offset, PAGE_SIZE); } set_page_dirty(page); - SetPageUptodate(page); + if (!PageUptodate(page)) + SetPageUptodate(page); trace_f2fs_vm_page_mkwrite(page, DATA); mapped: |