linux-kernel - Re: [PATCH] Reduce vm_stat cacheline contention in __vm_enough

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Message-ID: <m2mxcyz4f7.fsf@firstfloor.org>
Date:	Tue, 18 Oct 2011 08:48:44 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	Dimitri Sivanich <sivanich@....com>
Cc:	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	Christoph Lameter <cl@...two.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mel@....ul.ie>
Subject: Re: [PATCH] Reduce vm_stat cacheline contention in __vm_enough_memory

Dimitri Sivanich <sivanich@....com> writes:
>
> Would it make sense to have the ZVC delta be tuneable (via /proc/sys/vm?), keeping the
> same default behavior as what we currently have?

Tunable is bad. We don't really want a "hundreds of lines magic shell script to
make large systems perform". Please find a way to auto tune.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only
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