cfq: async queue allocation per priority

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If we have two processes with different ioprio_class, but the same
ioprio_data, their async requests will fall into the same queue. I guess
such behavior is not expected, because it's not right to put real-time
requests and best-effort requests in the same queue.

The attached patch fixes the problem by introducing additional *cfqq
fields on cfqd, pointing to per-(class,priority) async queues.

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

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This commit is contained in:

Vasily Tarasov 2007-07-20 10:06:38 +02:00 • committed by Jens Axboe

parent 9a79b22741

commit c2dea2d1fd

2 changed files with 52 additions and 12 deletions

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8

include/linux/ioprio.h

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