From: Hannes Reinecke <hare@suse.de>
Date: Fri, 25 Oct 2019 07:08:56 +0000 (+0200)
Subject: md/raid1: avoid soft lockup under high load
X-Git-Tag: v5.5-rc1~201^2~14^2~2
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=5fa4f8bac9516b988d2ccd3f05f4267f8da24269;p=users%2Fhch%2Fuuid.git

md/raid1: avoid soft lockup under high load

As all I/O is being pushed through a kernel thread the softlockup
watchdog might be triggered under high load.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Song Liu <songliubraving@fb.com>
---

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index bb29aeefcbd0..a409ab6f30bc 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -819,6 +819,7 @@ static void flush_bio_list(struct r1conf *conf, struct bio *bio)
 		else
 			generic_make_request(bio);
 		bio = next;
+		cond_resched();
 	}
 }