linux-kernel - Re: 2.6.19-rc6-mm2

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Message-ID: <456D1807.1000603@qumranet.com>
Date:	Wed, 29 Nov 2006 07:17:59 +0200
From:	Avi Kivity <avi@...ranet.com>
To:	Andrew Morton <akpm@...l.org>
CC:	Thomas Tuttle <thinkinginbinary@...il.com>,
	Linux kernel mailing list <linux-kernel@...r.kernel.org>,
	Yaniv Kamay <yaniv@...ranet.com>
Subject: Re: 2.6.19-rc6-mm2

Andrew Morton wrote:
> On Tue, 28 Nov 2006 19:24:45 -0500
> Thomas Tuttle <thinkinginbinary@...il.com> wrote:
>
>   
>> I've found a couple of bugs so far...
>>
>> 1. I did `modprobe kvm' and then tried running a version of the KVM Qemu
>> compiled for a different kernel.  My mistake.  But I got an oops:
>>
>> BUG: unable to handle kernel NULL pointer dereference at virtual address 00000008
>> Code: 14 0f 87 77 02 00 00 8b 0c b5 00 15 20 f9 85 c9 0f 84 68 02 00 00 89 ea 89 f8 ff d1 85 c0 0f 84 4c 02 00 00 89 f8 e8 31 e9 ff ff <65> a1 08 00 00 00 8b 40 04 8b 40 08 a8 04 0f 85 ae 02 00 00 e8 
>> EIP: [<f91f9c3f>] kvm_vmx_return+0xef/0x4d0 [kvm] SS:ESP 0068:e5a4fd54
>>
>>     

65 a1 08 00 00 00       mov    %gs:0x8,%eax

kvm isn't restoring gs properly.

I'll look into it.


>> Oh, and I get a ton of these messages with kvm:
>>
>> rtc: lost some interrupts at 1024Hz.
>>     
>
>   

I'll look into these too, though I'm not sure where.


-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.

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