linux-kernel - Re: Page Faults slower in 2.6.25-rc9 than 2.6.23

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Message-ID: <48175005.90400@linux.vnet.ibm.com>
Date:	Tue, 29 Apr 2008 22:12:45 +0530
From:	Balbir Singh <balbir@...ux.vnet.ibm.com>
To:	Hugh Dickins <hugh@...itas.com>
CC:	Ross Biro <rossb@...gle.com>, linux-mm@...ck.org,
	lkml <linux-kernel@...r.kernel.org>,
	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>
Subject: Re: Page Faults slower in 2.6.25-rc9 than 2.6.23

Hugh Dickins wrote:
> On Tue, 29 Apr 2008, Ross Biro wrote:
>> On Tue, Apr 29, 2008 at 10:52 AM, Balbir Singh
>> <balbir@...ux.vnet.ibm.com> wrote:
>>>  Hmm.. strange.. I don't remember the overhead being so bad (I'll
>>>  relook at my old numbers). I'll try and git-bisect this one
>> I'm checking 2.6.24 now.  A quick run of 2.6.25-rc9 without fake numa
>> showed no real change.
> 
> Worth checking 2.6.24, yes.  But you've already made it clear that
> you do NOT have mem cgroups in your 2.6.25-rc9, so Balbir (probably)
> need not worry about your regression: my guess was wrong on that.
> 

Aah.. Yes... but I am definitely interested in figuring out the root cause for
the regression.

-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL
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