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Date: Thu, 12 Aug 2010 08:47:55 -0700
From: "H. Peter Anvin" <hpa@zytor.com>
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To: Borislav Petkov <bp@amd64.org>
CC: Joerg Roedel <joro@8bytes.org>, "Roedel, Joerg" <Joerg.Roedel@amd.com>,
        "mingo@elte.hu" <mingo@elte.hu>,
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Subject: Re: [PATCH 1/2] x86-32: Fix crashes with CPU hotplug on AMD machines
References: <1280940316-7966-1-git-send-email-bp@amd64.org> <1280940316-7966-2-git-send-email-bp@amd64.org> <4C59F24B.1010702@zytor.com> <20100805074503.GI18307@amd.com> <4C5AC736.20903@zytor.com> <20100812144142.GY23755@8bytes.org> <4C64148D.5080305@zytor.com> <20100812154756.GD2070@aftab>
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On 08/12/2010 08:47 AM, Borislav Petkov wrote:
>>
>> Agreed.  I do have a concern about the kernel page tables not being
>> synchronized into trampoline_pg_dir (it's only an issue for 32-bit
>> !PAE), so at the very least we need to keep an eye out for it...
> 
> I've been working on what you suggested and the patch boots on a 32-bit
> PAE kernel but keeps rebooting on non-PAE after setting the stack_start
> on the AP. I could send it out later for you to look at, if you like -
> you should be able to spot what I'm missing :)...
> 

Sounds good.  This is obviously .37-or-higher material.

	-hpa

-- 
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel.  I don't speak on their behalf.