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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>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2021-02-22 18:07:33 +08:00 • committed by Jaegeuk Kim
commit 7688fb401d
1 changed files with 2 additions and 0 deletions
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fs/f2fs/segment.c
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@ -1759,6 +1759,8 @@ 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);