From: Rik van Riel <riel@redhat.com>
To: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Eric Dumazet <dada1@cosmosbay.com>,
Andrew Morton <akpm@linux-foundation.org>,
Ulrich Drepper <drepper@redhat.com>,
Andi Kleen <andi@firstfloor.org>,
Linux Kernel <linux-kernel@vger.kernel.org>,
Jakub Jelinek <jakub@redhat.com>,
linux-mm@kvack.org, Hugh Dickins <hugh@veritas.com>
Subject: Re: missing madvise functionality
Date: Tue, 03 Apr 2007 17:29:06 -0400 [thread overview]
Message-ID: <4612C722.1000006@redhat.com> (raw)
In-Reply-To: <4612C5AC.2070008@goop.org>
Jeremy Fitzhardinge wrote:
> Eric Dumazet wrote:
>> mmap()/brk() must give fresh NULL pages, but maybe
>> madvise(MADV_DONTNEED) can relax this requirement (if the pages were
>> reclaimed, then a page fault could bring a new page with random content)
>
> Only if those pages were originally from that process. Otherwise you've
> got a bit of an information leak there.
Or from another process by the same user, in the same security
context. That gets a bit more complex though :)
--
Politics is the struggle between those who want to make their country
the best in the world, and those who believe it already is. Each group
calls the other unpatriotic.
next prev parent reply other threads:[~2007-04-03 21:29 UTC|newest]
Thread overview: 99+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-03 16:26 missing madvise functionality Ulrich Drepper
2007-04-03 16:55 ` Rik van Riel
2007-04-03 17:10 ` Ulrich Drepper
2007-04-03 17:37 ` Rik van Riel
2007-04-03 18:14 ` Andi Kleen
2007-04-03 17:20 ` Ulrich Drepper
2007-04-03 17:28 ` Andi Kleen
2007-04-03 19:59 ` Andrew Morton
2007-04-03 20:09 ` Andi Kleen
2007-04-03 20:17 ` Ulrich Drepper
2007-04-03 20:29 ` Jakub Jelinek
2007-04-03 20:38 ` Rik van Riel
2007-04-03 21:49 ` Andrew Morton
2007-04-03 23:01 ` Eric Dumazet
2007-04-04 2:22 ` Nick Piggin
2007-04-04 5:41 ` Eric Dumazet
2007-04-04 6:09 ` [patches] threaded vma patches (was Re: missing madvise functionality) Nick Piggin
2007-04-04 6:26 ` Andrew Morton
2007-04-04 6:38 ` Nick Piggin
2007-04-04 6:42 ` Ulrich Drepper
2007-04-04 6:44 ` Nick Piggin
2007-04-04 6:50 ` Eric Dumazet
2007-04-04 6:54 ` Ulrich Drepper
2007-04-04 7:33 ` Eric Dumazet
2007-04-04 8:25 ` missing madvise functionality Peter Zijlstra
2007-04-04 8:55 ` Nick Piggin
2007-04-04 9:12 ` William Lee Irwin III
2007-04-04 9:23 ` Nick Piggin
2007-04-04 9:34 ` Eric Dumazet
2007-04-04 9:45 ` Nick Piggin
2007-04-04 10:05 ` Nick Piggin
2007-04-04 11:54 ` Eric Dumazet
2007-04-05 2:01 ` Nick Piggin
2007-04-05 6:09 ` Eric Dumazet
2007-04-05 6:19 ` Ulrich Drepper
2007-04-05 6:54 ` Eric Dumazet
2007-04-03 23:02 ` Andrew Morton
2007-04-04 9:15 ` Hugh Dickins
2007-04-04 14:55 ` Rik van Riel
2007-04-04 15:25 ` Hugh Dickins
2007-04-05 1:44 ` Nick Piggin
2007-04-04 18:04 ` Andrew Morton
2007-04-04 18:08 ` Rik van Riel
2007-04-04 20:56 ` Andrew Morton
2007-04-04 18:39 ` Hugh Dickins
2007-04-03 23:44 ` Andrew Morton
2007-04-04 13:09 ` William Lee Irwin III
2007-04-04 13:38 ` William Lee Irwin III
2007-04-04 18:51 ` Andrew Morton
2007-04-05 4:14 ` William Lee Irwin III
2007-04-04 23:00 ` preemption and rwsems (was: Re: missing madvise functionality) Andrew Morton
2007-04-05 12:48 ` David Howells
2007-04-05 19:11 ` Ingo Molnar
2007-04-05 20:37 ` Andrew Morton
2007-04-06 9:08 ` Ingo Molnar
2007-04-06 19:30 ` Andrew Morton
2007-04-06 19:40 ` Ingo Molnar
2007-04-05 19:27 ` Andrew Morton
2007-04-05 7:31 ` missing madvise functionality Rik van Riel
2007-04-05 7:39 ` Rik van Riel
2007-04-05 8:32 ` Andrew Morton
2007-04-05 15:47 ` Rik van Riel
2007-04-05 8:08 ` Eric Dumazet
2007-04-05 8:31 ` Rik van Riel
2007-04-05 9:06 ` Eric Dumazet
2007-04-05 9:45 ` Jakub Jelinek
2007-04-05 16:15 ` Rik van Riel
2007-04-05 16:10 ` Ulrich Drepper
2007-04-06 2:28 ` Nick Piggin
2007-04-06 2:52 ` Ulrich Drepper
2007-04-06 2:59 ` Nick Piggin
2007-04-03 20:51 ` Andrew Morton
2007-04-03 20:57 ` Ulrich Drepper
2007-04-03 21:00 ` Rik van Riel
2007-04-03 21:10 ` Eric Dumazet
2007-04-03 21:12 ` Jörn Engel
2007-04-03 21:15 ` Rik van Riel
2007-04-03 21:30 ` Eric Dumazet
2007-04-03 21:22 ` Jeremy Fitzhardinge
2007-04-03 21:29 ` Rik van Riel [this message]
2007-04-03 21:46 ` Ulrich Drepper
2007-04-03 22:51 ` Andi Kleen
2007-04-03 23:07 ` Ulrich Drepper
2007-04-03 21:16 ` Andrew Morton
2007-04-04 18:49 ` Anton Blanchard
2007-04-03 22:07 ` Arnd Bergmann
2007-04-03 22:23 ` Ulrich Drepper
2007-04-04 2:53 ` Marko Macek
2007-04-04 2:56 ` Rik van Riel
2007-04-04 14:37 ` Hugh Dickins
2007-04-04 7:46 ` Nick Piggin
2007-04-04 8:04 ` Nick Piggin
2007-04-04 8:20 ` Jakub Jelinek
2007-04-04 8:47 ` Nick Piggin
2007-04-05 4:23 ` Nick Piggin
2007-04-05 18:38 ` Rik van Riel
2007-04-05 21:07 ` Andrew Morton
2007-04-05 21:39 ` Rik van Riel
2007-04-06 1:28 ` Nick Piggin
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