From: Rik van Riel <riel@redhat.com>
To: balbir@linux.vnet.ibm.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: Sun, 27 Dec 2009 23:12:07 -0500 [thread overview]
Message-ID: <4B383017.4070308@redhat.com> (raw)
In-Reply-To: <20091228035738.GH3601@balbir.in.ibm.com>
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.
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next prev parent reply other threads:[~2009-12-28 4:12 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-12-28 2:53 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 [this message]
2009-12-28 4:17 ` Balbir Singh
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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