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由 Eric Paris 提交于
btrfs options can change at times other than mount, yet /proc/mounts shows the options string used when the fs was mounted (an example would be when btrfs determines that barriers aren't useful and turns them off.) This patch instead outputs the actual options in use by btrfs. Signed-off-by: NEric Paris <eparis@redhat.com> Signed-off-by: NChris Mason <chris.mason@oracle.com>
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