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Re: [4/6] go BUG on vmallocspace in __pa() (was: Re: [-mm patch] i386: enable 4k stacks by default)

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From: Alan Cox <alan@...>
To: Andi Kleen <andi@...>
Cc: William Lee Irwin III <wli@...>, Andi Kleen <andi@...>, Christoph Hellwig <hch@...>, David Chinner <dgc@...>, Zan Lynx <zlynx@...>, Adrian Bunk <bunk@...>, Linux Kernel <linux-kernel@...>
Subject: Re: [4/6] go BUG on vmallocspace in __pa() (was: Re: [-mm patch] i386: enable 4k stacks by default)
Date: Monday, April 30, 2007 - 3:20 pm

On Mon, 30 Apr 2007 20:52:42 +0200
Andi Kleen <andi@firstfloor.org> wrote:


But not too costly to do if it is done solely with vmalloc the stack for
debug purposes. The bigger problem with the vmalloc approach is there are
still offenders who DMA off the kernel stack on i386 although I'd hope
they are all ancient... we'll find out with this anyway
-
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Messages in current thread:
[-mm patch] i386: enable 4k stacks by default, Adrian Bunk, (Sat Apr 28, 3:19 pm)
Re: [-mm patch] i386: enable 4k stacks by default, Zan Lynx, (Sat Apr 28, 5:18 pm)
Re: [-mm patch] i386: enable 4k stacks by default, David Chinner, (Sun Apr 29, 11:58 pm)
Re: [-mm patch] i386: enable 4k stacks by default, Alan Cox, (Mon Apr 30, 4:17 am)
Re: [-mm patch] i386: enable 4k stacks by default, Andi Kleen, (Mon Apr 30, 6:26 am)
Re: [-mm patch] i386: enable 4k stacks by default, Christoph Hellwig, (Mon Apr 30, 6:48 am)
Re: [-mm patch] i386: enable 4k stacks by default, Andi Kleen, (Mon Apr 30, 8:13 am)
Re: [-mm patch] i386: enable 4k stacks by default, William Lee Irwin III, (Mon Apr 30, 1:38 pm)
Re: [-mm patch] i386: enable 4k stacks by default, Andi Kleen, (Mon Apr 30, 2:51 pm)
Re: [-mm patch] i386: enable 4k stacks by default, Jan Engelhardt, (Mon Apr 30, 2:22 pm)
Re: [-mm patch] i386: enable 4k stacks by default, William Lee Irwin III, (Mon Apr 30, 2:35 pm)
[6/6] arrange for a guard page on cpu 0's IRQ stack (was: Re..., William Lee Irwin III, (Mon Apr 30, 1:47 pm)
[5/6] dynamically allocate IRQ stacks (was: Re: [-mm patch] ..., William Lee Irwin III, (Mon Apr 30, 1:46 pm)
Re: [5/6] dynamically allocate IRQ stacks (was: Re: [-mm pat..., Zwane Mwaikambo, (Mon Apr 30, 3:49 pm)
Re: [5/6] dynamically allocate IRQ stacks (was: Re: [-mm pat..., Andi Kleen, (Mon Apr 30, 4:07 pm)
Re: [5/6] dynamically allocate IRQ stacks (was: Re: [-mm pat..., Bill Irwin, (Mon Apr 30, 4:03 pm)
[4/6] go BUG on vmallocspace in __pa() (was: Re: [-mm patch]..., William Lee Irwin III, (Mon Apr 30, 1:45 pm)
Re: [4/6] go BUG on vmallocspace in __pa(), Jeremy Fitzhardinge, (Wed May 2, 6:31 pm)
Re: [4/6] go BUG on vmallocspace in __pa(), Bill Irwin, (Wed May 2, 6:48 pm)
Re: [4/6] go BUG on vmallocspace in __pa() (was: Re: [-mm pa..., Andi Kleen, (Mon Apr 30, 2:52 pm)
Re: [4/6] go BUG on vmallocspace in __pa() (was: Re: [-mm pa..., Alan Cox, (Mon Apr 30, 3:20 pm)
Re: [4/6] go BUG on vmallocspace in __pa() (was: Re: [-mm pa..., Bill Irwin, (Mon Apr 30, 3:26 pm)
Re: [4/6] go BUG on vmallocspace in __pa() (was: Re: [-mm pa..., William Lee Irwin III, (Mon Apr 30, 2:58 pm)
[3/6] make IRQ stacks independently configurable (was: Re: [..., William Lee Irwin III, (Mon Apr 30, 1:44 pm)
Re: [3/6] make IRQ stacks independently configurable (was: R..., Christoph Hellwig, (Mon Apr 30, 2:11 pm)
Re: [3/6] make IRQ stacks independently configurable (was: R..., William Lee Irwin III, (Mon Apr 30, 2:14 pm)
[1/6] make stack size configurable (was: Re: [-mm patch] i38..., William Lee Irwin III, (Mon Apr 30, 1:40 pm)
Re: [1/6] make stack size configurable (was: Re: [-mm patch]..., Adrian Bunk, (Mon Apr 30, 2:25 pm)
Re: [1/6] make stack size configurable (was: Re: [-mm patch]..., William Lee Irwin III, (Mon Apr 30, 2:32 pm)
Re: [1/6] make stack size configurable (was: Re: [-mm patch]..., Christoph Hellwig, (Mon Apr 30, 2:10 pm)
Re: [1/6] make stack size configurable (was: Re: [-mm patch]..., William Lee Irwin III, (Mon Apr 30, 2:13 pm)
[2/6] add config option to vmalloc stacks (was: Re: [-mm pat..., William Lee Irwin III, (Mon Apr 30, 1:43 pm)
Re: [2/6] add config option to vmalloc stacks (was: Re: [-mm..., Joseph Fannin, (Fri May 4, 1:35 am)
Re: [2/6] add config option to vmalloc stacks (was: Re: [-mm..., Bill Irwin, (Fri May 4, 3:43 am)
Re: [2/6] add config option to vmalloc stacks (was: Re: [-mm..., Christoph Hellwig, (Mon Apr 30, 2:11 pm)
Re: [2/6] add config option to vmalloc stacks (was: Re: [-mm..., William Lee Irwin III, (Mon Apr 30, 3:09 pm)
Re: [2/6] add config option to vmalloc stacks (was: Re: [-mm..., Christoph Hellwig, (Mon Apr 30, 3:15 pm)
Re: [2/6] add config option to vmalloc stacks (was: Re: [-mm..., Matt Mackall, (Tue May 1, 6:36 pm)
Re: [2/6] add config option to vmalloc stacks (was: Re: [-mm..., Bill Irwin, (Tue May 1, 6:51 pm)
Re: [2/6] add config option to vmalloc stacks (was: Re: [-mm..., Matt Mackall, (Tue May 1, 7:15 pm)
Re: [2/6] add config option to vmalloc stacks (was: Re: [-mm..., Bill Irwin, (Tue May 1, 7:27 pm)
Re: [2/6] add config option to vmalloc stacks (was: Re: [-mm..., Alan Cox, (Tue May 1, 7:07 pm)
Re: [2/6] add config option to vmalloc stacks (was: Re: [-mm..., Bill Irwin, (Tue May 1, 7:23 pm)
Re: [2/6] add config option to vmalloc stacks (was: Re: [-mm..., Bill Irwin, (Mon Apr 30, 6:04 pm)
Re: [2/6] add config option to vmalloc stacks (was: Re: [-mm..., Bill Irwin, (Mon Apr 30, 3:23 pm)
Re: [2/6] add config option to vmalloc stacks (was: Re: [-mm..., Jan Engelhardt, (Mon Apr 30, 2:25 pm)