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xfs: ensure we mark all inodes in a freed cluster XFS_ISTALE
commit 5b3eed7 upstream. Under heavy load parallel metadata loads (e.g. dbench), we can fail to mark all the inodes in a cluster being freed as XFS_ISTALE as we skip inodes we cannot get the XFS_ILOCK_EXCL or the flush lock on. When this happens and the inode cluster buffer has already been marked stale and freed, inode reclaim can try to write the inode out as it is dirty and not marked stale. This can result in writing th metadata to an freed extent, or in the case it has already been overwritten trigger a magic number check failure and return an EUCLEAN error such as: Filesystem "ram0": inode 0x442ba1 background reclaim flush failed with 117 Fix this by ensuring that we hoover up all in memory inodes in the cluster and mark them XFS_ISTALE when freeing the cluster. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
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