Commit 76c7bfb3 authored Dec 13, 2018 by Jaegeuk Kim

f2fs: flush stale issued discard candidates



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 <jaegeuk@kernel.org>

parent 72691af6

fs/f2fs/segment.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -1652,6 +1652,10 @@ 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))

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