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xfs: do not read the AGI buffer in xfs_dialloc until nessecary
authorChristoph Hellwig <hch@infradead.org>
Wed, 4 Jul 2012 14:54:50 +0000 (10:54 -0400)
committerBen Myers <bpm@sgi.com>
Sun, 29 Jul 2012 21:10:54 +0000 (16:10 -0500)
commitbe60fe54b216a62403b816d3930a66ad7c51cbc6
tree20ae0c5de24e347a42f49a33802de67ff6ee4442tree | snapshot
parent55d6af64cb8bf8c7e9a84b254d2c3479be8c067ccommit | diff
xfs: do not read the AGI buffer in xfs_dialloc until nessecary

Refactor the AG selection loop in xfs_dialloc to operate on the in-memory
perag data as much as possible.  We only read the AGI buffer once we have
selected an AG to allocate inodes now instead of for every AG considered.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
fs/xfs/xfs_ialloc.c diff | blob | history
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