linux-kernel - Re: [PATCH] mm/vmalloc: don't use vmalloc

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Message-ID: <4B1FEE5C.1030303@sgi.com>
Date:	Wed, 09 Dec 2009 10:37:16 -0800
From:	Mike Travis <travis@....com>
To:	Christoph Lameter <cl@...ux-foundation.org>
CC:	tony.luck@...el.com, Andrew Morton <akpm@...ux-foundation.org>,
	Jan Beulich <JBeulich@...ell.com>, Tejun Heo <tj@...nel.org>,
	linux-mm@...ck.org, Geert Uytterhoeven <geert@...ux-m68k.org>,
	linux-ia64@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mm/vmalloc: don't use vmalloc_end



Christoph Lameter wrote:
> On Wed, 9 Dec 2009, Mike Travis wrote:
> 
>>> Tony: Can you confirm that the new percpu stuff works on IA64? (Or is
>>> there nobody left to care?)
>> Christoph,  I have access to a 640p system for a couple more weeks if
>> there's anything you'd like me to check out.
> 
> Boot with 2.6.32 and see if the per cpu allocator works. Check if there
> are any changes to memory consumption. Create a few thousand virtual
> ethernet devices and see if the system keels over.

Any advice on how to go about the above would be helpful... ;-)

> 
> It may also be good to run some scheduler test. Compare AIM9 of latest
> SLES with 2.6.32. Concurrent page fault test? Then a performance test with
> lots of concurrency but the usual stuff wont work since HPC apps usually
> pin.

I'm doing some aim7/9 comparisons right now between SPARSE and DISCONTIG
memory configs using sles11 + 2.6.32.  Which other benchmarks would you
recommend for the other tests?

> 
> Run latencytest (available in the lldiag package) from
> kernel.org/pub/linux/kernel/people/christoph/lldiag and see how the
> disturbances by the OS are changed.

I'll put that on the list.
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