This is a note to let you know that I've just added the patch titled
Btrfs: skip submitting barrier for missing device
to the 3.14-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
btrfs-skip-submitting-barrier-for-missing-device.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From f88ba6a2a44ee98e8d59654463dc157bb6d13c43 Mon Sep 17 00:00:00 2001
From: Hidetoshi Seto <seto.hidetoshi@xxxxxxxxxxxxxx>
Date: Wed, 5 Feb 2014 16:34:38 +0900
Subject: Btrfs: skip submitting barrier for missing device
From: Hidetoshi Seto <seto.hidetoshi@xxxxxxxxxxxxxx>
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@xxxxxxxxxxxxxx>
Signed-off-by: Josef Bacik <jbacik@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/btrfs/disk-io.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -3244,6 +3244,8 @@ 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_send++;
continue;
@@ -3258,6 +3260,8 @@ 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_wait++;
continue;
Patches currently in stable-queue which might be from seto.hidetoshi@xxxxxxxxxxxxxx are
queue-3.14/btrfs-skip-submitting-barrier-for-missing-device.patch
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