From: Wu Fengguang <fengguang.wu@intel.com>
To: Andi Kleen <andi@firstfloor.org>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Christoph Lameter <cl@linux-foundation.org>,
Andrew Morton <akpm@linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>, Elladan <elladan@eskimo.com>,
Nick Piggin <npiggin@suse.de>,
Johannes Weiner <hannes@cmpxchg.org>,
Peter Zijlstra <peterz@infradead.org>,
Rik van Riel <riel@redhat.com>, "tytso@mit.edu" <tytso@mit.edu>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
"minchan.kim@gmail.com" <minchan.kim@gmail.com>
Subject: Re: [PATCH 2/3] vmscan: make mapped executable pages the first class citizen
Date: Wed, 20 May 2009 22:32:58 +0800 [thread overview]
Message-ID: <20090520143258.GA5706@localhost> (raw)
In-Reply-To: <87pre4nhqf.fsf@basil.nowhere.org>
On Wed, May 20, 2009 at 07:20:24PM +0800, Andi Kleen wrote:
> Wu Fengguang <fengguang.wu@intel.com> writes:
> >
> > 2.6.30-rc4-mm, VM_EXEC protection ON
> > ------------------------------------
> > begin: 2444 6652 50021 207 0 619959
> > end: 284 231752 233394 210 773879 20890132
> > restore: 399 231973 234352 251 776879 20960568
> >
> > We can reach basically the same conclusion from the above data.
>
> One scenario that might be useful to test is what happens when some
> very large processes, all mapped and executable exceed memory and
Good idea. Too bad I may have to install some bloated desktop in order
to test this out ;) I guess the pgmajfault+pswpin numbers can serve as
negative scores in that case?
> fight each other for the working set. Do you have regressions then
> compared to without the patches?
No regressions for the above test. IMHO it can hardly create
regressions if there are no one to aggressively abuse it. Rik and
Christoph's ratio based logics are more likely to achieve better
protections as well as regressions.
Thanks,
Fengguang
next prev parent reply other threads:[~2009-05-20 14:33 UTC|newest]
Thread overview: 69+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-05-16 9:00 [PATCH 0/3] make mapped executable pages the first class citizen Wu Fengguang
2009-05-16 9:00 ` [PATCH 1/3] vmscan: report vm_flags in page_referenced() Wu Fengguang
2009-05-16 13:17 ` Johannes Weiner
2009-05-16 13:37 ` Rik van Riel
2009-05-17 0:35 ` Minchan Kim
2009-05-17 1:36 ` Minchan Kim
2009-05-17 1:58 ` Wu Fengguang
2009-05-16 9:00 ` [PATCH 2/3] vmscan: make mapped executable pages the first class citizen Wu Fengguang
2009-05-16 9:28 ` Wu Fengguang
2009-05-16 13:20 ` Johannes Weiner
2009-05-17 0:38 ` Minchan Kim
2009-05-18 14:46 ` Christoph Lameter
2009-05-19 3:27 ` Wu Fengguang
2009-05-19 4:41 ` KOSAKI Motohiro
2009-05-19 4:44 ` KOSAKI Motohiro
2009-05-19 4:48 ` Wu Fengguang
2009-05-19 5:09 ` Wu Fengguang
2009-05-19 6:27 ` Wu Fengguang
2009-05-19 6:25 ` Wu Fengguang
2009-05-20 11:20 ` Andi Kleen
2009-05-20 14:32 ` Wu Fengguang [this message]
2009-05-20 14:47 ` Andi Kleen
2009-05-20 14:56 ` Wu Fengguang
2009-05-20 15:38 ` Wu Fengguang
2009-06-08 12:14 ` Nai Xia
2009-06-08 12:46 ` Wu Fengguang
2009-06-08 15:02 ` Nai Xia
2009-06-08 7:39 ` Wu Fengguang
2009-06-08 7:51 ` KOSAKI Motohiro
2009-06-08 7:56 ` Wu Fengguang
2009-06-08 17:18 ` Nai Xia
2009-06-09 6:44 ` Wu Fengguang
2009-05-19 7:15 ` Wu Fengguang
2009-05-19 7:20 ` KOSAKI Motohiro
2009-05-19 7:49 ` Wu Fengguang
2009-05-19 8:06 ` KOSAKI Motohiro
2009-05-19 8:53 ` Wu Fengguang
2009-05-19 12:28 ` KOSAKI Motohiro
2009-05-20 1:44 ` Wu Fengguang
2009-05-20 1:59 ` KOSAKI Motohiro
2009-05-20 2:31 ` Wu Fengguang
2009-05-20 2:58 ` KOSAKI Motohiro
2009-05-19 13:24 ` Rik van Riel
2009-05-19 15:55 ` KOSAKI Motohiro
2009-05-19 6:39 ` Pekka Enberg
2009-05-19 6:56 ` KOSAKI Motohiro
2009-05-19 7:44 ` Peter Zijlstra
2009-05-19 8:05 ` Pekka Enberg
2009-05-19 8:12 ` Wu Fengguang
2009-05-19 8:14 ` Pekka Enberg
2009-05-19 13:14 ` Rik van Riel
2009-05-16 9:00 ` [PATCH 3/3] vmscan: merge duplicate code in shrink_active_list() Wu Fengguang
2009-05-16 13:39 ` Johannes Weiner
2009-05-16 13:47 ` Wu Fengguang
2009-05-16 14:35 ` Rik van Riel
2009-05-17 1:24 ` Minchan Kim
2009-05-16 14:56 ` [PATCH 0/3] make mapped executable pages the first class citizen Peter Zijlstra
2009-06-17 21:11 ` Jesse Barnes
2009-06-17 21:37 ` Jesse Barnes
2009-06-18 1:25 ` Wu Fengguang
2009-06-18 16:33 ` Jesse Barnes
2009-06-19 9:00 ` Wu, Fengguang
2009-06-19 9:04 ` Peter Zijlstra
2009-06-19 9:32 ` Wu Fengguang
2009-06-19 16:43 ` Jesse Barnes
2009-07-04 1:27 ` Roger WANG
2009-07-06 17:38 ` Jesse Barnes
-- strict thread matches above, loose matches on Subject: below --
2009-05-17 2:23 Wu Fengguang
2009-05-17 2:23 ` [PATCH 2/3] vmscan: " Wu Fengguang
2009-05-19 8:59 ` Wu Fengguang
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