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* [PATCH] md/raid5: cast chunk_sectors to sector_t value
@ 2020-12-16  1:26 Guoqing Jiang
  2020-12-16  4:26 ` Song Liu
  0 siblings, 1 reply; 4+ messages in thread
From: Guoqing Jiang @ 2020-12-16  1:26 UTC (permalink / raw)
  To: linux-raid; +Cc: song, Guoqing Jiang

Currently, raid5 calculates dev_sectors from chunk_sectors without
proper cast, which is problematic.

Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
---
I think the recently report about raid5 issue could be related with
the setting of dev_sectors.

Could someone test it with a large raid5 array? Thanks.

 drivers/md/raid5.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 3934347..ca0b29a 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -7662,7 +7662,7 @@ static int raid5_run(struct mddev *mddev)
 	}
 
 	/* device size must be a multiple of chunk size */
-	mddev->dev_sectors &= ~(mddev->chunk_sectors - 1);
+	mddev->dev_sectors &= ~((sector_t)mddev->chunk_sectors - 1);
 	mddev->resync_max_sectors = mddev->dev_sectors;
 
 	if (mddev->degraded > dirty_parity_disks &&
-- 
2.7.4


^ permalink raw reply	[flat|nested] 4+ messages in thread

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Thread overview: 4+ messages (download: mbox.gz / follow: Atom feed)
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2020-12-16  1:26 [PATCH] md/raid5: cast chunk_sectors to sector_t value Guoqing Jiang
2020-12-16  4:26 ` Song Liu
2021-01-25 13:57   ` Jack Wang
2021-01-26 18:50     ` Song Liu

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