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Subject[PATCH] f2fs: check discard command number before traversing discard pending list
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In trim thread, let's add a condition to check discard command number
before traversing discard pending list, it can avoid unneeded traversing
if there is no discard command.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
---
fs/f2fs/segment.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index deaf57e13125..1e674c117ce3 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1769,6 +1769,8 @@ static int issue_discard_thread(void *data)
wait_ms = dpolicy.max_interval;
continue;
}
+ if (!atomic_read(&dcc->discard_cmd_cnt))
+ continue;

if (sbi->gc_mode == GC_URGENT_HIGH)
__init_discard_policy(sbi, &dpolicy, DPOLICY_FORCE, 1);
--
2.29.2
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