linux-kernel - Re: [RESEND][RFC] BFQ I/O Scheduler

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Message-ID: <48076A97.9060003@qumranet.com>
Date:	Thu, 17 Apr 2008 18:19:51 +0300
From:	Avi Kivity <avi@...ranet.com>
To:	Jens Axboe <jens.axboe@...cle.com>
CC:	Paolo Valente <paolo.valente@...more.it>,
	Pavel Machek <pavel@....cz>, linux-kernel@...r.kernel.org
Subject: Re: [RESEND][RFC] BFQ I/O Scheduler

Jens Axboe wrote:
> I was thinking about that too. Generally I've been opposed to doing
> scheduling decisions on anything but time, since that is always
> relevant. When to hand out slices and to what process, that algorithm is
> really basic in CFQ and could do with an improvement.
>   

Jumping in at random, does "process" here mean task or mms_struct?  If 
the former, doesn't that mean that a 100-thread process can starve out a 
single-threaded process?

Perhaps we need hierarchical io scheduling, like cfs has for the cpu.

-- 
error compiling committee.c: too many arguments to function

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