From: Rik van Riel <riel@redhat.com>
To: akataria@vmware.com
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
LKML <linux-kernel@vger.kernel.org>,
Lee Schermerhorn <Lee.Schermerhorn@hp.com>,
Dave Hansen <dave@linux.vnet.ibm.com>, Mel Gorman <mel@csn.ul.ie>,
"linux-mm@kvack.org" <linux-mm@kvack.org>
Subject: Re: [PATCH] Hugepages should be accounted as unevictable pages.
Date: Tue, 23 Jun 2009 17:24:45 -0400 [thread overview]
Message-ID: <4A41481D.1060607@redhat.com> (raw)
In-Reply-To: <1245736441.18339.21.camel@alok-dev1>
Alok Kataria wrote:
> Both, while working on an module I noticed that there is no way direct
> way to get any information regarding the total number of unrecliamable
> (unevictable) pages in the system. While reading through the kernel
> sources i came across this unevictalbe LRU framework and thought that
> this should actually work towards providing total unevictalbe pages in
> the system irrespective of where they reside.
The unevictable count tells you how many _userspace_
pages are not evictable.
There are countless accounted and unaccounted kernel
allocations that show up (or not) in other fields in
/proc/meminfo.
I can see something reasonable on both sides of this
particular debate. However, even with this patch the
"unevictable" statistic does not reclaim the total
number of pages that are unevictable pages from a
zone, so I am not sure how it helps you achieve your
goal.
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next prev parent reply other threads:[~2009-06-23 21:24 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-06-22 21:25 [PATCH] Hugepages should be accounted as unevictable pages Alok Kataria
2009-06-23 3:25 ` KOSAKI Motohiro
2009-06-23 4:46 ` Alok Kataria
2009-06-23 5:05 ` KOSAKI Motohiro
2009-06-23 5:11 ` KAMEZAWA Hiroyuki
2009-06-23 5:54 ` Alok Kataria
2009-06-23 6:06 ` KAMEZAWA Hiroyuki
2009-06-23 19:28 ` Alok Kataria
2009-06-23 20:30 ` Lee Schermerhorn
2009-06-23 21:24 ` Rik van Riel [this message]
2009-06-23 21:42 ` Alok Kataria
2009-06-23 21:55 ` Rik van Riel
2009-06-23 22:06 ` Alok Kataria
2009-06-23 22:19 ` Dave Hansen
2009-06-23 22:55 ` Rik van Riel
2009-06-23 23:28 ` Alok Kataria
2009-06-23 23:48 ` Dave Hansen
2009-06-23 22:15 ` Dave Hansen
2009-06-23 22:23 ` Alok Kataria
2009-06-23 23:41 ` Dave Hansen
2009-06-24 0:08 ` Alok Kataria
2009-06-23 12:26 ` Lee Schermerhorn
2009-06-29 9:58 ` Mel Gorman
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