OpenVZ Forum: Devel » [PATCH] cfq: async queue allocation per priority

Home » Mailing lists » Devel » [PATCH] cfq: async queue allocation per priority

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

[PATCH] cfq: async queue allocation per priority [message #15089]

Wed, 18 July 2007 14:35

Vasily Tarasov
Messages: 1345
Registered: January 2006

Senior Member

Jens, I think the last patch, that makes queues allocation per priority,
has a problem.

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.

Thanks,
Vasily

Attachment: diff-cfq-asyn-queues-per-prio
(Size: 3.11KB, Downloaded 238 times)

Report message to a moderator

[Message index]

		[PATCH] cfq: async queue allocation per priority By: Vasily Tarasov on Wed, 18 July 2007 14:35
		Re: [PATCH] cfq: async queue allocation per priority By: Jens Axboe on Wed, 18 July 2007 18:51
		Re: [PATCH] cfq: async queue allocation per priority By: Vasily Tarasov on Thu, 19 July 2007 07:52
		Re: [PATCH] cfq: async queue allocation per priority By: Jens Axboe on Thu, 19 July 2007 17:30

Previous Topic:	[PATCH] Cleanup elevator_ops->trim function
Next Topic:	[PATCH] Add kernel/notifier.c

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

]

Current Time: Sun Aug 03 02:57:20 GMT 2025

Total time taken to generate the page: 0.70185 seconds