linux-kernel - Re: [PATCH v5 00/11] Introduce huge zero page

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Message-ID: <50A42E77.8030200@linux.intel.com>
Date:	Wed, 14 Nov 2012 15:51:19 -0800
From:	"H. Peter Anvin" <hpa@...ux.intel.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
CC:	Alan Cox <alan@...rguk.ukuu.org.uk>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Andrea Arcangeli <aarcange@...hat.com>, linux-mm@...ck.org,
	Andi Kleen <ak@...ux.intel.com>, linux-kernel@...r.kernel.org,
	"Kirill A. Shutemov" <kirill@...temov.name>
Subject: Re: [PATCH v5 00/11] Introduce huge zero page

On 11/14/2012 03:32 PM, Andrew Morton wrote:
> 
> The current code does the latter, by freeing the page via a
> "slab"-shrinker callback.
> 
> But I do suspect that with the right combination of use/unuse and
> memory pressure, we could still get into the high-frequency scenario.
> 

There probably isn't any mechanism that doesn't end up with poor results
in some corner case... just like the vhzp variant.

	-hpa

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