From: Andi Kleen <andi@firstfloor.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Ingo Molnar <mingo@elte.hu>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
Avi Kivity <avi@qumranet.com>
Subject: Re: [git pull] core, x86: make LIST_POISON less deadly
Date: Mon, 14 Jul 2008 20:35:05 +0200 [thread overview]
Message-ID: <871w1wz546.fsf@basil.nowhere.org> (raw)
In-Reply-To: <alpine.LFD.1.10.0807140758100.3305@woody.linux-foundation.org> (Linus Torvalds's message of "Mon, 14 Jul 2008 08:03:16 -0700 (PDT)")
Linus Torvalds <torvalds@linux-foundation.org> writes:
>
> Why not pick something that is *guaranteed* to fault? The above looks like
> any future setup that supports 41 bits of addressing and has extended the
> page tables (yes, it will happen eventually) will find that to be a
> perfectly valid address?
When that happens then it will be either unmapped (and fault anyways)
or the kernel has to be changed to 5 level page tables first and then
surely the poison value could change too.
-Andi
next prev parent reply other threads:[~2008-07-14 18:37 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-07-14 14:48 Ingo Molnar
2008-07-14 15:03 ` Linus Torvalds
2008-07-14 15:12 ` Ingo Molnar
2008-07-14 15:53 ` Avi Kivity
2008-07-14 15:59 ` Linus Torvalds
2008-07-14 16:07 ` Ingo Molnar
2008-07-14 16:08 ` Avi Kivity
2008-07-14 16:26 ` Linus Torvalds
2008-07-14 16:34 ` Ingo Molnar
2008-07-14 18:33 ` Andi Kleen
2008-07-14 18:42 ` Linus Torvalds
2008-07-14 19:11 ` Andi Kleen
2008-07-14 19:30 ` Linus Torvalds
2008-07-14 19:42 ` Andi Kleen
2008-07-14 18:35 ` Andi Kleen [this message]
2008-07-14 18:42 ` Linus Torvalds
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