From: NeilBrown <neilb@suse.de>
Date: Fri, 16 Oct 2009 04:55:32 +0000 (+1100)
Subject: md/raid1/raid10: add a cond_resched
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=1d9d52416c0445019ccc1f0fddb9a227456eb61b;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

md/raid1/raid10: add a cond_resched

During 'check' of a raid1 or raid10 it is possible for the management
thread to spend a lot of time running 'memcmp' on blocks from
different devices, so make sure the thread has a chance to schedule.
raid5d already has a cond_resched (in process_stripe).

Reported-By: Lee Howard <faxguy@howardsilvan.com>
Signed-off-by: NeilBrown <neilb@suse.de>
---

diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index d1b9bd5fd4f6..71a01a2e1938 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1683,6 +1683,7 @@ static void raid1d(mddev_t *mddev)
 				generic_make_request(bio);
 			}
 		}
+		cond_resched();
 	}
 	if (unplug)
 		unplug_slaves(mddev);
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index 51c4c5c4d87a..69fc76caa469 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1632,6 +1632,7 @@ static void raid10d(mddev_t *mddev)
 				generic_make_request(bio);
 			}
 		}
+		cond_resched();
 	}
 	if (unplug)
 		unplug_slaves(mddev);