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authorChristoph Hellwig <hch@infradead.org>2011-04-24 23:06:17 +0400
committerAlex Elder <aelder@sgi.com>2011-04-28 22:18:09 +0400
commit8a072a4d4c6a5b6ec32836c467d2996393c76c6f (patch)
treeb21dad1310e4351854b9e2e24feb86beed20d1f7 /lib/crc-ccitt.c
parent97d3ac75e5e0ebf7ca38ae74cebd201c09b97ab2 (diff)
downloadlinux-8a072a4d4c6a5b6ec32836c467d2996393c76c6f.tar.xz
xfs: reduce the number of pagb_lock roundtrips in xfs_alloc_clear_busy
Instead of finding the per-ag and then taking and releasing the pagb_lock for every single busy extent completed sort the list of busy extents and only switch betweens AGs where nessecary. This becomes especially important with the online discard support which will hit this lock more often. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
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