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Date: Mon, 28 Apr 2014 02:11:22 +0100 From: Ben Hutchings <ben@...adent.org.uk> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org CC: akpm@...ux-foundation.org, "Hidetoshi Seto" <seto.hidetoshi@...fujitsu.com>, "Josef Bacik" <jbacik@...com> Subject: [PATCH 3.2 40/94] Btrfs: skip submitting barrier for missing device 3.2.58-rc1 review patch. If anyone has any objections, please let me know. ------------------ From: Hidetoshi Seto <seto.hidetoshi@...fujitsu.com> commit f88ba6a2a44ee98e8d59654463dc157bb6d13c43 upstream. I got an error on v3.13: BTRFS error (device sdf1) in write_all_supers:3378: errno=-5 IO failure (errors while submitting device barriers.) how to reproduce: > mkfs.btrfs -f -d raid1 /dev/sdf1 /dev/sdf2 > wipefs -a /dev/sdf2 > mount -o degraded /dev/sdf1 /mnt > btrfs balance start -f -sconvert=single -mconvert=single -dconvert=single /mnt The reason of the error is that barrier_all_devices() failed to submit barrier to the missing device. However it is clear that we cannot do anything on missing device, and also it is not necessary to care chunks on the missing device. This patch stops sending/waiting barrier if device is missing. Signed-off-by: Hidetoshi Seto <seto.hidetoshi@...fujitsu.com> Signed-off-by: Josef Bacik <jbacik@...com> Signed-off-by: Ben Hutchings <ben@...adent.org.uk> --- fs/btrfs/disk-io.c | 4 ++++ 1 file changed, 4 insertions(+) --- a/fs/btrfs/disk-io.c +++ b/fs/btrfs/disk-io.c @@ -2731,6 +2731,8 @@ static int barrier_all_devices(struct bt /* send down all the barriers */ head = &info->fs_devices->devices; list_for_each_entry_rcu(dev, head, dev_list) { + if (dev->missing) + continue; if (!dev->bdev) { errors++; continue; @@ -2745,6 +2747,8 @@ static int barrier_all_devices(struct bt /* wait for all the barriers */ list_for_each_entry_rcu(dev, head, dev_list) { + if (dev->missing) + continue; if (!dev->bdev) { errors++; continue; -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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