[PATCH] [BLOCK] cfq-iosched: change cfq io context linking from list to tree

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On setups with many disks, we spend a considerable amount of time
looking up the process-disk mapping on each queue of io. Testing with
a NULL based block driver, this costs 40-50% reduction in throughput
for 1000 disks.

Signed-off-by: Jens Axboe <axboe@suse.de>

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Jens Axboe 2006-03-28 08:59:01 +02:00

parent 329b10bb0f

commit e2d74ac066

3 changed files with 114 additions and 124 deletions

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14

include/linux/blkdev.h

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