tree 08cf04c696bf0facb083bbfbdd867e5949c5fa14
parent 6d63c275572d1e6f00d4fa154f16fbb0d8c2d2bf
author Jens Axboe <jens.axboe@oracle.com> 1210148146 +0200
committer Jens Axboe <jens.axboe@oracle.com> 1210148146 +0200

block: avoid duplicate calls to get_part() in disk stat code

get_part() is fairly expensive, as it O(N) loops over partitions
to find the right one. In lots of normal IO paths we end up looking
up the partition twice, to make matters even worse. Change the
stat add code to accept a passed in partition instead.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>