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Re: seems to be a flaw in cfq [message #9194 is a reply to message #9190]

Thu, 21 December 2006 15:49

Vasily Tarasov
Messages: 1345
Registered: January 2006

Senior Member

Jens Axboe wrote:
> On Thu, Dec 21 2006, Vasily Tarasov wrote:
>
>> Hello,
>>
>> On 2.6.19 "buffered randread" bizarre behavior persists. So it was fixed
>> somewhere in 2.6.20... Can you give me a guess, what changes in 2.6.20
>> cause this fix? The point is that we want to port it back to 2.6.18
>> (rhel-5), if possible.
>>
>
> Is the 2.6.19 buffered randread case a CFQ only problem?
>
Yes, deadline and anticipatory don't have no such problem at all.

Thanks.

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[Message index]

		seems to be a flaw in cfq By: Vasily Tarasov on Tue, 19 December 2006 13:53
		Re: seems to be a flaw in cfq By: Jens Axboe on Tue, 19 December 2006 14:37
		Re: seems to be a flaw in cfq By: Jens Axboe on Tue, 19 December 2006 14:54
		Re: seems to be a flaw in cfq By: Jens Axboe on Tue, 19 December 2006 14:59
		Re: seems to be a flaw in cfq By: Jens Axboe on Tue, 19 December 2006 18:47
		Re: seems to be a flaw in cfq By: Vasily Tarasov on Wed, 20 December 2006 07:09
		Re: seems to be a flaw in cfq By: Jens Axboe on Wed, 20 December 2006 09:33
		Re: seems to be a flaw in cfq By: Jens Axboe on Wed, 20 December 2006 09:35
		Re: seems to be a flaw in cfq By: Jens Axboe on Wed, 20 December 2006 09:38
		Re: seems to be a flaw in cfq By: Vasily Tarasov on Thu, 21 December 2006 09:03
		Re: seems to be a flaw in cfq By: Jens Axboe on Thu, 21 December 2006 09:14
		Re: seems to be a flaw in cfq By: Jens Axboe on Thu, 21 December 2006 09:15
		Re: seems to be a flaw in cfq By: Vasily Tarasov on Thu, 21 December 2006 12:16
		Re: seems to be a flaw in cfq By: Jens Axboe on Thu, 21 December 2006 13:41
		Re: seems to be a flaw in cfq By: Vasily Tarasov on Thu, 21 December 2006 15:49
		Re: seems to be a flaw in cfq By: Jens Axboe on Thu, 21 December 2006 15:58
		Re: seems to be a flaw in cfq By: Vasily Tarasov on Fri, 22 December 2006 06:27
		Re: seems to be a flaw in cfq By: Jens Axboe on Fri, 22 December 2006 09:37

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