f2fs: shrink blk plug region

Don't use blk plug covering area where there won't be any IOs being issued.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 471ea994441218c502b0c65f6e902c89013de90b..58cfbe3d4dc7d6679537c66dde924bf2f9f8df9f 100644 (file)
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -853,9 +853,8 @@ repeat:
        if (kthread_should_stop())
                return 0;
 
-       blk_start_plug(&plug);
-
        mutex_lock(&dcc->cmd_lock);
+       blk_start_plug(&plug);
        list_for_each_entry_safe(dc, tmp, pend_list, list) {
                f2fs_bug_on(sbi, dc->state != D_PREP);
 
@@ -865,6 +864,7 @@ repeat:
                if (iter++ > DISCARD_ISSUE_RATE)
                        break;
        }
+       blk_finish_plug(&plug);
 
        list_for_each_entry_safe(dc, tmp, wait_list, list) {
                if (dc->state == D_DONE) {
@@ -874,8 +874,6 @@ repeat:
        }
        mutex_unlock(&dcc->cmd_lock);
 
-       blk_finish_plug(&plug);
-
        iter = 0;
        congestion_wait(BLK_RW_SYNC, HZ/50);