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authorBrian Foster <bfoster@redhat.com>2017-08-29 10:08:40 -0700
committerDarrick J. Wong <darrick.wong@oracle.com>2017-09-01 10:55:30 -0700
commit2dd3d709fc4338681a3aa61658122fa8faa5a437 (patch)
tree3f93d0d040996d5042ec3735df553c038b065ee4 /fs/iomap.c
parenta5814bceea48ee1c57c4db2bd54b0c0246daf54a (diff)
downloadlinux-2dd3d709fc4338681a3aa61658122fa8faa5a437.tar.bz2
xfs: relog dirty buffers during swapext bmbt owner change
The owner change bmbt scan that occurs during extent swap operations does not handle ordered buffer failures. Buffers that cannot be marked ordered must be physically logged so previously dirty ranges of the buffer can be relogged in the transaction. Since the bmbt scan may need to process and potentially log a large number of blocks, we can't expect to complete this operation in a single transaction. Update extent swap to use a permanent transaction with enough log reservation to physically log a buffer. Update the bmbt scan to physically log any buffers that cannot be ordered and to terminate the scan with -EAGAIN. On -EAGAIN, the caller rolls the transaction and restarts the scan. Finally, update the bmbt scan helper function to skip bmbt blocks that already match the expected owner so they are not reprocessed after scan restarts. Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Christoph Hellwig <hch@lst.de> [darrick: fix the xfs_trans_roll call] Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Diffstat (limited to 'fs/iomap.c')
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