Btrfs: do not merge rbios if their fail stripe index are not identical
Since fail stripe index in rbio would be used to decide which algorithm reconstruction would be run, we cannot merge rbios if their's fail striped indexes are different, otherwise, one of the two reconstructions would fail. Signed-off-by: NLiu Bo <bo.li.liu@oracle.com> Reviewed-by: NDavid Sterba <dsterba@suse.com> Signed-off-by: NDavid Sterba <dsterba@suse.com>
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