[dm-devel] [PATCH 4/6] dm cache: add cond_resched() to various workqueue loops
Mike Snitzer
snitzer at kernel.org
Fri Feb 17 20:07:35 UTC 2023
Otherwise on resource constrained systems these workqueues may be too
greedy.
Signed-off-by: Mike Snitzer <snitzer at kernel.org>
---
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 23195701dc15..dbbcfa580078 100644
--- a/drivers/md/dm-cache-target.c
+++ b/drivers/md/dm-cache-target.c
@@ -1829,6 +1829,7 @@ static void process_deferred_bios(struct work_struct *ws)
else
commit_needed = process_bio(cache, bio) || commit_needed;
+ cond_resched();
}
if (commit_needed)
@@ -1852,6 +1853,7 @@ 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();
}
}
@@ -1892,6 +1894,8 @@ static void check_migrations(struct work_struct *ws)
r = mg_start(cache, op, NULL);
if (r)
break;
+
+ cond_resched();
}
}
--
2.37.0 (Apple Git-136)
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