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authorChao Yu <yuchao0@huawei.com>2018-05-23 16:25:09 +0200
committerJaegeuk Kim <jaegeuk@kernel.org>2018-05-31 20:31:50 +0200
commitf8de4331224513271a99dce967e637cf14f4bc28 (patch)
tree0ef5fa58946a199ff9dbf6f053e3bc4c4fa225b1 /fs/f2fs
parentf2fs: clean up with is_valid_blkaddr() (diff)
downloadlinux-f8de4331224513271a99dce967e637cf14f4bc28.tar.xz
linux-f8de4331224513271a99dce967e637cf14f4bc28.zip
f2fs: detect synchronous writeback more earlier
This patch changes to detect synchronous writeback more earlier before, in order to avoid unnecessary page writeback before exiting asynchronous writeback. Signed-off-by: Chao Yu <yuchao0@huawei.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
-rw-r--r--fs/f2fs/data.c11
1 files changed, 8 insertions, 3 deletions
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index 19c3c2180cca..abb45f5653f9 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -1981,6 +1981,13 @@ retry:
struct page *page = pvec.pages[i];
bool submitted = false;
+ /* give a priority to WB_SYNC threads */
+ if (atomic_read(&F2FS_M_SB(mapping)->wb_sync_req) &&
+ wbc->sync_mode == WB_SYNC_NONE) {
+ done = 1;
+ break;
+ }
+
done_index = page->index;
retry_write:
lock_page(page);
@@ -2035,9 +2042,7 @@ continue_unlock:
last_idx = page->index;
}
- /* give a priority to WB_SYNC threads */
- if ((atomic_read(&F2FS_M_SB(mapping)->wb_sync_req) ||
- --wbc->nr_to_write <= 0) &&
+ if (--wbc->nr_to_write <= 0 &&
wbc->sync_mode == WB_SYNC_NONE) {
done = 1;
break;