linux-kernel - Re: [PATCH 0/3] Virtual huge zero page

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Date:	Mon, 01 Oct 2012 10:37:23 -0700
From:	"H. Peter Anvin" <hpa@...ux.intel.com>
To:	"Kirill A. Shutemov" <kirill@...temov.name>
CC:	Andrea Arcangeli <aarcange@...hat.com>,
	"Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
	Andrew Morton <akpm@...ux-foundation.org>, linux-mm@...ck.org,
	Andi Kleen <ak@...ux.intel.com>, linux-kernel@...r.kernel.org,
	Arnd Bergmann <arnd@...db.de>, Ingo Molnar <mingo@...nel.org>,
	linux-arch@...r.kernel.org
Subject: Re: [PATCH 0/3] Virtual huge zero page

On 10/01/2012 10:36 AM, Kirill A. Shutemov wrote:
> On Mon, Oct 01, 2012 at 10:33:12AM -0700, H. Peter Anvin wrote:
>> Overall, I'm okay with either as long as we don't lock down 2 MB when
>> there isn't a huge zero page in use.
> 
> Is shinker-reclaimable huge zero page okay for you?
> 

Yes, I'm fine with that.  However, I'm curious about the relative
benefit versus virtual hzp from a performance perspective, on an
application where hzp actually matters.

One can otherwise argue that if hzp doesn't matter for except in a small
number of cases that we shouldn't use it at all.

	-hpa


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