commit 5fa4f8bac9516b988d2ccd3f05f4267f8da24269
author Hannes Reinecke <hare@suse.de> Fri Oct 25 09:08:56 2019 +0200
committer Song Liu <songliubraving@fb.com> Mon Nov 11 16:32:22 2019 -0800
tree 3418d060df452d8539fb72877eec594a73f1be9e
parent da644b2cc1a4664ff7f75d3ae50e3fcf638580d9

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>

drivers/md/raid1.c

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index bb29aee..a409ab6 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();
 	}
 }