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From: Nick Piggin <npiggin@suse.de>
To: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Cc: Mel Gorman <mel@csn.ul.ie>,
	Andrew Morton <akpm@linux-foundation.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	epasch@de.ibm.com, SCHILLIG@de.ibm.com,
	Martin Schwidefsky <schwidefsky@de.ibm.com>,
	Heiko Carstens <heiko.carstens@de.ibm.com>,
	christof.schmitt@de.ibm.com, thoss@de.ibm.com, hare@suse.de,
	gregkh@novell.com
Subject: Re: Performance regression in scsi sequential throughput (iozone) due to "e084b - page-allocator: preserve PFN ordering when	__GFP_COLD is set"
Date: Fri, 26 Feb 2010 22:18:23 +1100	[thread overview]
Message-ID: <20100226111823.GI9738@laptop> (raw)
In-Reply-To: <4B8693B0.7000804@linux.vnet.ibm.com>

On Thu, Feb 25, 2010 at 04:13:52PM +0100, Christian Ehrhardt wrote:
> Christian Ehrhardt wrote:
> FIN)
> So, thats it from my side.
> I look forward to the finalized congestion_wait->zone wait patch however
> this turns out (zone wait is resonable if fixing this symptom or not in
> my opinion).
> But still I have a small amount of hope left that all the data I found here
> might give someone the kick to see whats going on in mm's backstage due to
> that patches.

Hi Christian,

Thanks for doing all this work. I've been looking at a couple of other
regressions while it seemed like you guys were making progress. I can't
seem to reproduce it on my x86-64 system (was anybody able to reproduce
it on x86?)

Anyway I have asked our mainframe guy whether we can set up an
environment.

I agree it is a real problem that really needs to be properly explained.

Thanks,
Nick


  reply	other threads:[~2010-02-26 11:18 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-12-07 14:39 Performance regression in scsi sequential throughput (iozone) due to "e084b - page-allocator: preserve PFN ordering when __GFP_COLD is set" Christian Ehrhardt
2009-12-07 15:09 ` Mel Gorman
2009-12-08 17:59   ` Christian Ehrhardt
2009-12-10 14:36     ` Christian Ehrhardt
2009-12-11 11:20       ` Mel Gorman
2009-12-11 14:47         ` Christian Ehrhardt
2009-12-18 13:38           ` Christian Ehrhardt
2009-12-18 17:42             ` Mel Gorman
2010-01-14 12:30               ` Christian Ehrhardt
2010-01-19 11:33                 ` Mel Gorman
2010-02-05 15:51                   ` Christian Ehrhardt
2010-02-05 17:49                     ` Mel Gorman
2010-02-08 14:01                       ` Christian Ehrhardt
2010-02-08 15:21                         ` Mel Gorman
2010-02-08 16:55                           ` Mel Gorman
2010-02-09  6:23                           ` Christian Ehrhardt
2010-02-09 15:52                           ` Christian Ehrhardt
2010-02-09 17:57                             ` Mel Gorman
2010-02-11 16:11                               ` Christian Ehrhardt
2010-02-12 10:05                                 ` Nick Piggin
2010-02-15  6:59                                   ` Nick Piggin
2010-02-15 15:46                                   ` Christian Ehrhardt
2010-02-16 11:25                                     ` Mel Gorman
2010-02-16 16:47                                       ` Christian Ehrhardt
2010-02-17  9:55                                         ` Christian Ehrhardt
2010-02-17 10:03                                           ` Christian Ehrhardt
2010-02-18 11:43                                           ` Mel Gorman
2010-02-18 16:09                                             ` Christian Ehrhardt
2010-02-19 11:19                                               ` Christian Ehrhardt
2010-02-19 15:19                                                 ` Mel Gorman
2010-02-22 15:42                                                   ` Christian Ehrhardt
2010-02-25 15:13                                                     ` Christian Ehrhardt
2010-02-26 11:18                                                       ` Nick Piggin [this message]
2010-03-02  6:52                                                   ` Nick Piggin
2010-03-02 10:04                                                     ` Mel Gorman
2010-03-02 10:36                                                       ` Nick Piggin
2010-03-02 11:01                                                         ` Mel Gorman
2010-03-02 11:18                                                           ` Nick Piggin
2010-03-02 11:24                                                             ` Mel Gorman
2010-03-03  6:51                                                               ` Christian Ehrhardt
2010-02-08 15:02                       ` Christian Ehrhardt

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