From: Balbir Singh <balbir@linux.vnet.ibm.com>
To: Rik van Riel <riel@redhat.com>
Cc: Minchan Kim <minchan.kim@gmail.com>,
Andrew Morton <akpm@linux-foundation.org>,
lkml <linux-kernel@vger.kernel.org>,
linux-mm <linux-mm@kvack.org>,
Hugh Dickins <hugh.dickins@tiscali.co.uk>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Subject: Re: [PATCH -mmotm-2009-12-10-17-19] Prevent churning of zero page in LRU list.
Date: Mon, 28 Dec 2009 09:47:31 +0530 [thread overview]
Message-ID: <20091228041731.GI3601@balbir.in.ibm.com> (raw)
In-Reply-To: <4B383017.4070308@redhat.com>
* Rik van Riel <riel@redhat.com> [2009-12-27 23:12:07]:
> On 12/27/2009 10:57 PM, Balbir Singh wrote:
> >* Balbir Singh<balbir@linux.vnet.ibm.com> [2009-12-28 09:26:39]:
> >
> >>* Rik van Riel<riel@redhat.com> [2009-12-27 22:22:20]:
> >>
> >>>On 12/27/2009 09:53 PM, Minchan Kim wrote:
> >>>>
> >>>>VM doesn't add zero page to LRU list.
> ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
>
> >>Frequent moving of zero page should ideally put it to the head of the
> >>LRU list, leaving it untouched is likely to cause it to be scanned
> >>often - no? Should this be moved to the unevictable list?
> >>
> >
> >Sorry, I replied to wrong email, I should have been clearer that this
> >question is for Minchan Kim.
>
> The answer to your question is all the way up in
> Minchan Kim's original email.
>
> The zero page is never on the LRU lists to begin with.
>
Aahh.. my bad... I should have looked at it more closely!
--
Balbir
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next prev parent reply other threads:[~2009-12-28 4:17 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-28 2:53 [PATCH -mmotm-2009-12-10-17-19] Prevent churning of zero page in LRU list Minchan Kim
2009-12-28 2:57 ` KAMEZAWA Hiroyuki
2009-12-28 3:18 ` KOSAKI Motohiro
2009-12-28 3:22 ` Rik van Riel
2009-12-28 3:56 ` Balbir Singh
2009-12-28 3:57 ` Balbir Singh
2009-12-28 4:12 ` Rik van Riel
2009-12-28 4:17 ` Balbir Singh [this message]
2009-12-28 4:09 ` Minchan Kim
2009-12-30 17:03 ` Hugh Dickins
2009-12-31 2:26 ` Minchan Kim
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