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authorAnand Jain <anand.jain@oracle.com>2016-06-23 12:54:07 (GMT)
committerDavid Sterba <dsterba@suse.com>2016-07-26 11:52:25 (GMT)
commite2bf6e89b4c71ea08223f13a700cfd0b576f7e7a (patch)
tree7a946060ffab144a79a884e1abceb51e84795180
parentf448341af9cf50b9f405f5192f184d398e1812e0 (diff)
downloadlinux-e2bf6e89b4c71ea08223f13a700cfd0b576f7e7a.tar.xz
btrfs: make sure device is synced before return
An inconsistent behavior due to stale reads from the disk was reported mail-archive.com/linux-btrfs@vger.kernel.org/msg54188.html This patch will make sure devices are synced before return in the unmount thread. Signed-off-by: Anand Jain <anand.jain@oracle.com> Signed-off-by: David Sterba <dsterba@suse.com>
-rw-r--r--fs/btrfs/volumes.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index e54b3fe..51bd3ee 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -870,6 +870,11 @@ static void btrfs_close_one_device(struct btrfs_device *device)
if (device->missing)
fs_devices->missing_devices--;
+ if (device->bdev && device->writeable) {
+ sync_blockdev(device->bdev);
+ invalidate_bdev(device->bdev);
+ }
+
new_device = btrfs_alloc_device(NULL, &device->devid,
device->uuid);
BUG_ON(IS_ERR(new_device)); /* -ENOMEM */