Re: 2.6.20-rc2+: CFQ halving disk throughput.

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To: Rene Herman <rene.herman@...>, Jens Axboe <jens.axboe@...>

Cc: Tejun Heo <htejun@...>, Alan Cox <alan@...>, Linux Kernel Mailing List <linux-kernel@...>

Subject: Re: 2.6.20-rc2+: CFQ halving disk throughput.

Date: Monday, January 1, 2007 - 7:30 pm

On Mon, 1 Jan 2007, Rene Herman wrote:

quoted text> Rene Herman wrote:
> 
> > In fact, it's CFQ. The PATA thing was a red herring. 2.6.20-rc2 and 3 give
> > me ~ 24 MB/s from "hdparm t /dev/hda" while 2.6.20-rc1 and below give me ~
> > 50 MB/s.
> > 
> > Jens: this is due to "[PATCH] cfq-iosched: tighten allow merge criteria",
> > 719d34027e1a186e46a3952e8a24bf91ecc33837:
> 
> axboe@oracle.com bounces for me. Could one of the other recipients of parent
> message try to forward?

It should be "Jens Axboe <jens.axboe@oracle.com>". 

Jens was away over the holidays, hopefully he'll be back today or 
tomorrow.

		Linus
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Messages in current thread:

2.6.20-rc2+: CFQ halving disk throughput., Rene Herman, (Mon Jan 1, 6:46 pm)

Re: 2.6.20-rc2+: CFQ halving disk throughput., Andrew Morton, (Tue Jan 2, 1:36 am)

Re: 2.6.20-rc2+: CFQ halving disk throughput., Jens Axboe, (Tue Jan 2, 4:44 am)

Re: 2.6.20-rc2+: CFQ halving disk throughput., Rene Herman, (Tue Jan 2, 6:24 am)

Re: 2.6.20-rc2+: CFQ halving disk throughput., Jens Axboe, (Tue Jan 2, 7:57 am)

Re: 2.6.20-rc2+: CFQ halving disk throughput., Jens Axboe, (Tue Jan 2, 8:10 am)

Re: 2.6.20-rc2+: CFQ halving disk throughput., Mark Lord, (Tue Jan 2, 11:12 am)

Re: 2.6.20-rc2+: CFQ halving disk throughput., Jens Axboe, (Tue Jan 2, 11:14 am)

Re: 2.6.20-rc2+: CFQ halving disk throughput., Mark Lord, (Tue Jan 2, 11:40 am)

Re: 2.6.20-rc2+: CFQ halving disk throughput., Jens Axboe, (Tue Jan 2, 11:45 am)

Re: 2.6.20-rc2+: CFQ halving disk throughput., Mark Lord, (Mon Jan 1, 7:28 pm)

Re: 2.6.20-rc2+: CFQ halving disk throughput., Jens Axboe, (Tue Jan 2, 4:34 am)

Re: 2.6.20-rc2+: CFQ halving disk throughput., Mark Lord, (Tue Jan 2, 11:01 am)

Re: 2.6.20-rc2+: CFQ halving disk throughput., Jan Engelhardt, (Tue Jan 2, 1:09 pm)

Re: 2.6.20-rc2+: CFQ halving disk throughput., Tejun Heo, (Tue Jan 2, 12:53 pm)

Re: 2.6.20-rc2+: CFQ halving disk throughput., Mark Lord, (Tue Jan 2, 1:35 pm)

Re: 2.6.20-rc2+: CFQ halving disk throughput., Tejun Heo, (Tue Jan 2, 1:53 pm)

Re: 2.6.20-rc2+: CFQ halving disk throughput., Mark Lord, (Tue Jan 2, 2:10 pm)

Re: 2.6.20-rc2+: CFQ halving disk throughput., Rene Herman, (Mon Jan 1, 6:56 pm)

Re: 2.6.20-rc2+: CFQ halving disk throughput., Linus Torvalds, (Mon Jan 1, 7:30 pm)


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Tarkan Erimer	Re: Dual-Licensing Linux Kernel with GPL V2 and GPL V3
Greg Kroah-Hartman	[PATCH 004/196] Chinese: add translation of SubmittingPatches
Artem Bityutskiy	[PATCH 18/44 take 2] [UBI] build unit implementation
James Morris	Re: LSM conversion to static interface
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linux-netdev:
Paul Jackson	[PATCH] cpuset sched_load_balance kmalloc fix
Gerrit Renker	[PATCH 15/37] dccp: Set per-connection CCIDs via socket options
Jarek Poplawski	[PATCH] pkt_sched: Destroy gen estimators under rtnl_lock().
Linus Torvalds	Re: [GIT]: Networking
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Re: 2.6.20-rc2+: CFQ halving disk throughput.

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