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author | Darrick J. Wong <darrick.wong@oracle.com> | 2016-10-03 16:11:53 (GMT) |
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committer | Darrick J. Wong <darrick.wong@oracle.com> | 2016-10-05 23:26:32 (GMT) |
commit | 1f08af52e7c981e9877796a2d90b0e0f08666945 (patch) | |
tree | ae46494e7e50277389871deba53fca10e98f4f97 /Documentation/percpu-rw-semaphore.txt | |
parent | 39aff5fdb91e8fee6a2c28910a263a5228619ba2 (diff) | |
download | linux-1f08af52e7c981e9877796a2d90b0e0f08666945.tar.xz |
xfs: implement swapext for rmap filesystems
Implement swapext for filesystems that have reverse mapping. Back in
the reflink patches, we augmented the bmap code with a 'REMAP' flag
that updates only the bmbt and doesn't touch the allocator and
implemented log redo items for those two operations. Now we can
rewrite extent swapping as a (looong) series of remap operations.
This is far less efficient than the fork swapping method implemented
in the past, so we only switch this on for rmap.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'Documentation/percpu-rw-semaphore.txt')
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