linux-kernel - Re: inux-next: Tree for Apr 27 (uml + mm/memcontrol.c)

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Message-ID: <CABEgKgoPf69-Ps5Gc6Rv-TVVBxvTdjOJCdnbh6DzTa4A2m2y9A@mail.gmail.com>
Date:	Fri, 4 May 2012 08:33:43 +0900
From:	Hiroyuki Kamezawa <kamezawa.hiroyuki@...il.com>
To:	David Rientjes <rientjes@...gle.com>
Cc:	"Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Randy Dunlap <rdunlap@...otime.net>,
	Stephen Rothwell <sfr@...b.auug.org.au>,
	linux-next@...r.kernel.org, linux-kernel@...r.kernel.org,
	Richard Weinberger <richard@....at>,
	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
Subject: Re: inux-next: Tree for Apr 27 (uml + mm/memcontrol.c)

On Fri, May 4, 2012 at 8:21 AM, Hiroyuki Kamezawa
<kamezawa.hiroyuki@...il.com> wrote:
> On Fri, May 4, 2012 at 6:57 AM, David Rientjes <rientjes@...gle.com> wrote:
>> On Thu, 3 May 2012, David Rientjes wrote:
>> If I add XX:+UseLargePages to the command line to use
>> hugepages it's even larger.

Ah, sorry. I couldn't understand this. Why performance difference gets larger if
usage of anon memory decreases ? I guess overheads are just added to anon page
faults and file cache handling. If you use Hugepage, anon memory overheads will
disappear.

Thanks,
-Kame
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