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From: Avi Kivity <avi@qumranet.com>
To: Jens Axboe <jens.axboe@oracle.com>
Cc: Paolo Valente <paolo.valente@unimore.it>,
	Pavel Machek <pavel@ucw.cz>,
	linux-kernel@vger.kernel.org
Subject: Re: [RESEND][RFC] BFQ I/O Scheduler
Date: Thu, 17 Apr 2008 18:19:51 +0300	[thread overview]
Message-ID: <48076A97.9060003@qumranet.com> (raw)
In-Reply-To: <20080417083047.GV12774@kernel.dk>

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


  parent reply	other threads:[~2008-04-17 15:20 UTC|newest]

Thread overview: 30+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-04-01 15:29 Fabio Checconi
2008-04-15  8:22 ` Jens Axboe
2008-04-15  9:11   ` Fabio Checconi
2008-04-15 12:42     ` Jens Axboe
2008-04-15 18:08       ` Fabio Checconi
2008-04-16  6:48   ` Paolo Valente
2008-04-18  1:26   ` Aaron Carroll
2008-04-16 18:44 ` Pavel Machek
2008-04-17  6:14   ` Paolo Valente
2008-04-17  7:10     ` Jens Axboe
2008-04-17  8:26       ` Paolo Valente
2008-04-17  8:30         ` Jens Axboe
2008-04-17  9:24           ` Paolo Valente
2008-04-17  9:27             ` Jens Axboe
2008-04-17 10:19               ` Aaron Carroll
2008-04-17 10:21                 ` Jens Axboe
2008-04-17 11:30               ` Fabio Checconi
2008-04-17 15:19           ` Avi Kivity [this message]
2008-04-17 15:47             ` Paolo Valente
2008-04-17 15:51               ` Avi Kivity
2008-04-17 18:12                 ` Paolo Valente
2008-04-17 23:44             ` Aaron Carroll
2008-04-17 10:24         ` Aaron Carroll
2008-04-17 11:14           ` Fabio Checconi
2008-04-17 12:14             ` Aaron Carroll
2008-04-17 13:54               ` Jens Axboe
2008-04-17 15:18               ` Paolo Valente
2008-04-17  8:48       ` Pavel Machek
2008-04-17  8:57         ` Jens Axboe
2008-04-17  9:14   ` Fabio Checconi

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