Joerg's patch works for me too.
Thanks,
Benny
Andi Kleen wrote:
> On Thu, May 10, 2007 at 03:35:56PM +0200, Joerg Roedel wrote:
>> On Thu, May 10, 2007 at 03:01:44PM +0200, Andi Kleen wrote:
>>> On Wed, May 09, 2007 at 12:56:16PM -0700, Pete Zaitcev wrote:
>>>> Hi, Andi:
>>>>
>>>> The attached patch (actually, git show output) makes my Dell 1501 to hang
>>>> on boot. Sorry, I have no clue why... The culprit is found with git bisect.
>>>> But yes, it's an AMD MK-36. I use an x86_64 kernel. It is 100% reproducible.
>>> MK-36? Does it have SVM?
>>>
>>> Anyways we previously had issues with this being miscompiled, but
>>> I thought the latest patch should have been ok. What compiler do you use?
>>>
>>> Can you send me a disassembly listing of arch/x86_64/kernel/time.o?
>> I debugged this problem a bit and my compiler[1]interprets the =A
>> constraint as %rax instead of %edx:%eax on x86_64 which causes the
>> problem. The appended patch provides a workaround for this and fixed the
>> hang on my machine.
>
> Hmm yes now I can reproduce it too. I didn't see any hangs so i suppose
> my (and that of most -mm tester's) compiled binary always happened to have a
> suitable value in edx
>
> Thanks for the patch.
>
> -Andi
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Benny Halevy
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