f2fs: clear discard_wake earlier

If SBI_NEED_FSCK is set, discard_wake will never be cleared. As a
result, the condition of wait_event_interruptible_timeout() is always
true, which gets discard thread run too frequently.

Signed-off-by: Sheng Yong <shengyong1@huawei.com>
Reviewed-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 d61f5ca..bfbf666 100644 (file)
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1402,6 +1402,10 @@ static int issue_discard_thread(void *data)
                                kthread_should_stop() || freezing(current) ||
                                dcc->discard_wake,
                                msecs_to_jiffies(wait_ms));
+
+               if (dcc->discard_wake)
+                       dcc->discard_wake = 0;
+
                if (try_to_freeze())
                        continue;
                if (f2fs_readonly(sbi->sb))
@@ -1413,9 +1417,6 @@ static int issue_discard_thread(void *data)
                        continue;
                }
 
-               if (dcc->discard_wake)
-                       dcc->discard_wake = 0;
-
                if (sbi->gc_mode == GC_URGENT)
                        __init_discard_policy(sbi, &dpolicy, DPOLICY_FORCE, 1);