From 7fc5c2701c14d4867329bb276467a7a8ffdef8b9 Mon Sep 17 00:00:00 2001 From: Mike Snitzer Date: Thu, 16 Feb 2023 15:31:08 -0500 Subject: [PATCH] dm cache: add cond_resched() to various workqueue loops [ Upstream commit bbe008a21e4b9707b253e74924e6ddeaedbb1cfc ] Otherwise on resource constrained systems these workqueues may be too greedy. Signed-off-by: Mike Snitzer Signed-off-by: Sasha Levin --- drivers/md/dm-cache-target.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/md/dm-cache-target.c b/drivers/md/dm-cache-target.c index 5e92fac90b675..17fde3e5a1f7b 100644 --- a/drivers/md/dm-cache-target.c +++ b/drivers/md/dm-cache-target.c @@ -1805,6 +1805,7 @@ static void process_deferred_bios(struct work_struct *ws) else commit_needed = process_bio(cache, bio) || commit_needed; + cond_resched(); } if (commit_needed) @@ -1827,6 +1828,7 @@ static void requeue_deferred_bios(struct cache *cache) while ((bio = bio_list_pop(&bios))) { bio->bi_status = BLK_STS_DM_REQUEUE; bio_endio(bio); + cond_resched(); } } @@ -1867,6 +1869,8 @@ static void check_migrations(struct work_struct *ws) r = mg_start(cache, op, NULL); if (r) break; + + cond_resched(); } } -- 2.39.5