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authorJianpeng Ma <majianpeng@gmail.com>2012-10-11 07:17:59 +0400
committerNeilBrown <neilb@suse.de>2012-10-11 07:17:59 +0400
commit7f7583d420231b9d09897afd57a957011b606a5b (patch)
treeaa45d88b926bfc8e22f841b9ea83d338afa4c3ae /drivers/md/raid1.c
parent1ed850f356a0a422013846b5291acff08815008b (diff)
downloadlinux-7f7583d420231b9d09897afd57a957011b606a5b.tar.xz
Subject: [PATCH] md:change resync_mismatches to atomic64_t to avoid races
Now that multiple threads can handle stripes, it is safer to use an atomic64_t for resync_mismatches, to avoid update races. Signed-off-by: Jianpeng Ma <majianpeng@gmail.com> Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/raid1.c')
-rw-r--r--drivers/md/raid1.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c
index e913356b257e..8034fbd6190c 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1876,7 +1876,7 @@ static int process_checks(struct r1bio *r1_bio)
} else
j = 0;
if (j >= 0)
- mddev->resync_mismatches += r1_bio->sectors;
+ atomic64_add(r1_bio->sectors, &mddev->resync_mismatches);
if (j < 0 || (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)
&& test_bit(BIO_UPTODATE, &sbio->bi_flags))) {
/* No need to write to this device. */