From: Rik van Riel <riel@redhat.com>
To: Christoph Lameter <cl@linux.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>,
Peter Zijlstra <peterz@infradead.org>,
Wu Fengguang <fengguang.wu@intel.com>,
Andrew Morton <akpm@linux-foundation.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"tytso@mit.edu" <tytso@mit.edu>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
Elladan <elladan@eskimo.com>, Nick Piggin <npiggin@suse.de>,
Johannes Weiner <hannes@cmpxchg.org>,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Subject: Re: [PATCH -mm] vmscan: make mapped executable pages the first class citizen
Date: Thu, 07 May 2009 13:11:41 -0400 [thread overview]
Message-ID: <4A03164D.90203@redhat.com> (raw)
In-Reply-To: <alpine.DEB.1.10.0905071231090.10171@qirst.com>
Christoph Lameter wrote:
> We need some way to control this. If there would be a way to simply switch
> off eviction of exec pages (via /proc/sys/vm/never_reclaim_exec_pages or
> so) I'd use it.
Nobody (except you) is proposing that we completely disable
the eviction of executable pages. I believe that your idea
could easily lead to a denial of service attack, with a user
creating a very large executable file and mmaping it.
Giving executable pages some priority over other file cache
pages is nowhere near as dangerous wrt. unexpected side effects
and should work just as well.
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next prev parent reply other threads:[~2009-05-07 17:11 UTC|newest]
Thread overview: 168+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20090428044426.GA5035@eskimo.com>
2009-04-28 5:35 ` Swappiness vs. mmap() and interactive response KOSAKI Motohiro
2009-04-28 6:36 ` Elladan
2009-04-28 6:52 ` KOSAKI Motohiro
2009-04-28 7:26 ` Elladan
2009-04-28 7:44 ` KOSAKI Motohiro
2009-04-28 7:48 ` Peter Zijlstra
2009-04-28 7:58 ` Balbir Singh
2009-04-28 8:11 ` Peter Zijlstra
2009-04-28 8:23 ` KAMEZAWA Hiroyuki
2009-04-28 8:25 ` Balbir Singh
2009-04-28 8:03 ` KOSAKI Motohiro
2009-04-28 9:09 ` Wu Fengguang
2009-04-28 9:26 ` Wu Fengguang
2009-04-28 12:08 ` Theodore Tso
2009-04-29 5:51 ` KOSAKI Motohiro
2009-04-29 6:34 ` Andrew Morton
2009-04-29 7:47 ` KOSAKI Motohiro
2009-04-30 4:14 ` Elladan
2009-04-30 4:43 ` Andrew Morton
2009-04-30 4:55 ` KOSAKI Motohiro
2009-04-30 4:55 ` Elladan
2009-04-29 7:48 ` KOSAKI Motohiro
2009-04-30 11:59 ` KOSAKI Motohiro
2009-04-30 13:46 ` Elladan
2009-05-06 11:04 ` KOSAKI Motohiro
2009-04-28 15:28 ` Rik van Riel
2009-04-28 23:29 ` [PATCH] vmscan: evict use-once pages first Rik van Riel
2009-04-29 3:36 ` Elladan
2009-04-29 17:06 ` Christoph Hellwig
2009-04-29 6:42 ` Peter Zijlstra
2009-04-29 13:30 ` Rik van Riel
2009-04-29 15:47 ` [PATCH] vmscan: evict use-once pages first (v2) Rik van Riel
2009-04-29 16:07 ` KOSAKI Motohiro
2009-04-29 16:18 ` Rik van Riel
2009-04-29 17:14 ` [PATCH] vmscan: evict use-once pages first (v3) Rik van Riel
2009-04-30 0:39 ` KOSAKI Motohiro
2009-04-30 8:10 ` Johannes Weiner
2009-05-01 22:32 ` Andrew Morton
2009-05-01 23:05 ` Rik van Riel
2009-05-01 23:25 ` Andrew Morton
2009-05-03 1:28 ` Wu Fengguang
2009-05-03 1:15 ` Wu Fengguang
2009-05-03 1:33 ` Rik van Riel
2009-05-03 1:46 ` Wu Fengguang
2009-04-29 16:10 ` [PATCH] vmscan: evict use-once pages first (v2) Peter Zijlstra
2009-04-30 7:20 ` Elladan
2009-04-30 13:08 ` Rik van Riel
2009-04-30 14:00 ` Elladan
2009-05-01 0:45 ` Andrew Morton
2009-05-01 0:59 ` Rik van Riel
2009-05-01 1:13 ` Andrew Morton
2009-05-01 1:50 ` Rik van Riel
2009-05-01 2:54 ` Andrew Morton
2009-05-01 14:05 ` Rik van Riel
2009-05-01 18:04 ` Ray Lee
2009-05-01 19:34 ` Rik van Riel
2009-05-01 19:44 ` Ray Lee
2009-05-01 20:08 ` Rik van Riel
2009-05-01 20:17 ` Elladan
2009-05-01 19:35 ` Andrew Morton
2009-05-01 20:05 ` Rik van Riel
2009-05-01 20:45 ` Andrew Morton
2009-05-01 21:46 ` Rik van Riel
2009-05-03 3:15 ` Wu Fengguang
2009-05-03 3:24 ` Rik van Riel
2009-05-03 3:43 ` Wu Fengguang
2009-05-04 10:23 ` Peter Zijlstra
2009-05-07 12:11 ` [PATCH -mm] vmscan: make mapped executable pages the first class citizen Wu Fengguang
2009-05-07 13:39 ` Christoph Lameter
2009-05-07 14:15 ` Peter Zijlstra
2009-05-07 14:18 ` Christoph Lameter
2009-05-07 14:38 ` Peter Zijlstra
2009-05-07 15:36 ` Christoph Lameter
2009-05-07 15:59 ` Rik van Riel
2009-05-07 15:06 ` Rik van Riel
2009-05-07 16:00 ` Lee Schermerhorn
2009-05-07 16:32 ` Christoph Lameter
2009-05-07 17:11 ` Rik van Riel [this message]
2009-05-08 3:40 ` Elladan
2009-05-08 16:04 ` Rik van Riel
2009-05-09 4:04 ` Elladan
2009-05-08 17:18 ` Christoph Lameter
2009-05-09 10:20 ` KOSAKI Motohiro
2009-05-08 17:37 ` Alan Cox
2009-05-07 15:10 ` Johannes Weiner
2009-05-07 15:17 ` Peter Zijlstra
2009-05-07 15:21 ` Rik van Riel
2009-05-08 3:30 ` Wu Fengguang
2009-05-08 4:17 ` [RFC][PATCH] vmscan: report vm_flags in page_referenced() Wu Fengguang
2009-05-08 12:09 ` Minchan Kim
2009-05-08 12:15 ` Wu Fengguang
2009-05-08 14:01 ` Minchan Kim
2009-05-09 6:56 ` Wu Fengguang
2009-05-10 23:45 ` Minchan Kim
2009-05-17 11:25 ` Wu Fengguang
2009-05-07 20:44 ` [PATCH -mm] vmscan: make mapped executable pages the first class citizen Andrew Morton
2009-05-08 8:16 ` Wu Fengguang
2009-05-08 8:28 ` Wu Fengguang
2009-05-08 19:58 ` Andrew Morton
2009-05-08 22:00 ` Alan Cox
2009-05-08 22:15 ` Andrew Morton
2009-05-08 22:53 ` Elladan
2009-05-08 22:20 ` Rik van Riel
2009-05-10 8:59 ` KOSAKI Motohiro
2009-05-10 9:07 ` Peter Zijlstra
2009-05-10 9:35 ` Wu Fengguang
2009-05-10 10:06 ` KOSAKI Motohiro
2009-05-10 9:36 ` KOSAKI Motohiro
2009-05-10 13:45 ` Alan Cox
2009-05-10 13:56 ` KOSAKI Motohiro
2009-05-10 14:51 ` Rik van Riel
2009-05-10 14:59 ` KOSAKI Motohiro
2009-05-10 20:13 ` Alan Cox
2009-05-10 20:37 ` Rik van Riel
2009-05-10 21:23 ` Arjan van de Ven
2009-05-11 10:03 ` Johannes Weiner
2009-05-10 21:29 ` Alan Cox
2009-05-10 9:20 ` Wu Fengguang
2009-05-10 9:29 ` KOSAKI Motohiro
2009-05-10 10:03 ` Wu Fengguang
2009-05-10 10:15 ` KOSAKI Motohiro
2009-05-10 11:21 ` Wu Fengguang
2009-05-10 11:39 ` KOSAKI Motohiro
2009-05-10 11:44 ` Wu Fengguang
2009-05-10 12:19 ` Peter Zijlstra
2009-05-10 12:39 ` KOSAKI Motohiro
2009-05-10 13:17 ` Peter Zijlstra
2009-05-12 2:50 ` Wu Fengguang
2009-05-12 4:35 ` Wu Fengguang
2009-05-12 13:20 ` Rik van Riel
2009-05-16 9:26 ` Wu Fengguang
2009-05-12 2:51 ` [PATCH -mm] vmscan: report vm_flags in page_referenced() Wu Fengguang
2009-05-12 6:23 ` Peter Zijlstra
2009-05-12 6:44 ` Minchan Kim
2009-05-12 11:44 ` Wu Fengguang
2009-05-12 2:52 ` [PATCH -mm] vmscan: make mapped executable pages the first class citizen Wu Fengguang
2009-05-12 3:00 ` KOSAKI Motohiro
2009-05-12 20:54 ` [PATCH -mm] vmscan: protect a fraction of file backed mapped pages from reclaim Christoph Lameter
2009-05-12 17:06 ` Rik van Riel
2009-05-12 21:20 ` Christoph Lameter
2009-05-12 17:39 ` Rik van Riel
2009-05-12 22:02 ` Christoph Lameter
2009-05-12 20:17 ` Rik van Riel
2009-05-12 20:26 ` Christoph Lameter
2009-05-13 0:45 ` KOSAKI Motohiro
2009-05-14 20:14 ` Christoph Lameter
2009-05-14 23:28 ` KOSAKI Motohiro
2009-05-14 23:42 ` Rik van Riel
2009-05-15 18:09 ` Christoph Lameter
2009-05-16 8:54 ` Wu Fengguang
2009-05-12 8:17 ` [PATCH -mm] vmscan: make mapped executable pages the first class citizen Minchan Kim
2009-05-12 2:53 ` [PATCH -mm] vmscan: merge duplicate code in shrink_active_list() Wu Fengguang
2009-05-12 2:58 ` KOSAKI Motohiro
2009-05-12 3:03 ` Wu Fengguang
2009-05-12 7:26 ` Minchan Kim
2009-05-12 11:48 ` Wu Fengguang
2009-05-12 11:57 ` Minchan Kim
2009-05-12 13:32 ` Rik van Riel
2009-05-16 9:30 ` Wu Fengguang
2009-05-08 3:02 ` [PATCH -mm] vmscan: make mapped executable pages the first class citizen Wu Fengguang
2009-05-08 7:30 ` Minchan Kim
2009-05-08 8:09 ` Wu Fengguang
2009-05-08 9:34 ` Minchan Kim
2009-05-08 14:25 ` Christoph Lameter
2009-05-08 14:34 ` Rik van Riel
2009-05-08 17:41 ` KOSAKI Motohiro
2009-05-04 8:04 ` [PATCH] vmscan: evict use-once pages first (v2) Peter Zijlstra
2009-05-01 3:09 ` Elladan
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