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authorJosef Bacik <jbacik@fusionio.com>2012-08-03 22:49:19 +0200
committerChris Mason <chris.mason@oracle.com>2012-08-28 22:53:30 +0200
commitc329861da40623cd838b8c9ee31a850242fd88cf (patch)
treed395b6dae57c00c25f1b890db1f39871575a7013 /lib/crc16.c
parentBtrfs: do not strdup non existent strings (diff)
downloadlinux-c329861da40623cd838b8c9ee31a850242fd88cf.tar.xz
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Btrfs: don't allocate a seperate csums array for direct reads
We've been allocating a big array for csums instead of storing them in the io_tree like we do for buffered reads because previously we were locking the entire range, so we didn't have an extent state for each sector of the range. But now that we do the range locking as we map the buffers we can limit the mapping lenght to sectorsize and use the private part of the io_tree for our csums. This allows us to avoid an extra memory allocation for direct reads which could incur latency. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com>
Diffstat (limited to 'lib/crc16.c')
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