Sometimes, I could observe # of issuing_discard to be 1 which blocks background
jobs due to is_idle()=false.
The only way to get out of it was to trigger gc_urgent. This patch avoids that
by checking any candidates as done in the list.
Signed-off-by: Jaegeuk Kim <jaeg...@kernel.org>
---
fs/f2fs/segment.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 49ea9009ab5a..acbbc924e518 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1651,6 +1651,10 @@ static int issue_discard_thread(void *data)
if (dcc->discard_wake)
dcc->discard_wake = 0;
+ /* clean up pending candidates before going to sleep */
+ if (atomic_read(&dcc->queued_discard))
+ __wait_all_discard_cmd(sbi, NULL);
+
if (try_to_freeze())
continue;
if (f2fs_readonly(sbi->sb))
--
2.19.0.605.g01d371f741-goog
