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Subject: [PATCH] md:change resync_mismatches to atomic64_t to avoid races

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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>
This commit is contained in:
Jianpeng Ma
2012-10-11 14:17:59 +11:00
committed by NeilBrown
parent 1ed850f356
commit 7f7583d420
5 changed files with 9 additions and 8 deletions
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2
drivers/md/raid1.c
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@@ -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. */