4.0.0 rc2: possible bugs

4.0.0 rc2: possible bugs

[Yasir Assam]

I built rc2 and used the pvops kernel pulled from git for dom0 (make 
linux-2.6-pvops-build).

dom0 runs much slower than the the vanilla kernel (without xen), and the 
system as a whole, including the domUs I'm running, seems sluggish.

More of a concern is that I'm getting random segfaults in the domUs. I 
have 2 domUs running: one using the 2.6.18-xen (built for 3.4.2), and 
another using kernel.org 2.6.32.7. I can't be sure it's not a hardware 
problem (as I've also upgraded my MB) but both the RAM (tested with 
Memtest86) and the HD (tested with the WD diagnostic tool) seem ok.

Here's a sample of the domU segfaults (I can't reproduce them - they're 
random):

gnome-panel[3232]: segfault at 7f5264a27390 ip 00007f5263a8205d sp 
00007fff74ce9630 error 4 in libc-2.10.2.so[7f5263a11000+14a000]

sshd[6373]: segfault at 000000ffadffd8ff rip 000000ffadffd8ff rsp 
00007fffb61abab8 error 14

At one point I was using the dom0 kernel for one of the domUs and that 
crashed a few times, so I switched to kernel.org's 2.6.32.7

The domU using 2.6.18-xen has always been rock-solid before under 3.4.2 
and earlier (it uses Debian Stable).

Let me know if you want log/config files.

Thanks,
Yasir

Re: 4.0.0 rc2: possible bugs

[Pasi Kärkkäinen]

On Tue, Feb 02, 2010 at 10:12:21PM +1100, Yasir Assam wrote:
> I built rc2 and used the pvops kernel pulled from git for dom0 (make  
> linux-2.6-pvops-build).
>
> dom0 runs much slower than the the vanilla kernel (without xen), and the  
> system as a whole, including the domUs I'm running, seems sluggish.
>
> More of a concern is that I'm getting random segfaults in the domUs. I  
> have 2 domUs running: one using the 2.6.18-xen (built for 3.4.2), and  
> another using kernel.org 2.6.32.7. I can't be sure it's not a hardware  
> problem (as I've also upgraded my MB) but both the RAM (tested with  
> Memtest86) and the HD (tested with the WD diagnostic tool) seem ok.
>
> Here's a sample of the domU segfaults (I can't reproduce them - they're  
> random):
>
> gnome-panel[3232]: segfault at 7f5264a27390 ip 00007f5263a8205d sp  
> 00007fff74ce9630 error 4 in libc-2.10.2.so[7f5263a11000+14a000]
>
> sshd[6373]: segfault at 000000ffadffd8ff rip 000000ffadffd8ff rsp  
> 00007fffb61abab8 error 14
>
> At one point I was using the dom0 kernel for one of the domUs and that  
> crashed a few times, so I switched to kernel.org's 2.6.32.7
>
> The domU using 2.6.18-xen has always been rock-solid before under 3.4.2  
> and earlier (it uses Debian Stable).
>
> Let me know if you want log/config files.
>

Is your pv_ops dom0 kernel 32bit? Is your kernel.org 2.6.32.7 kernel 32bit? 

If yes, do you have CONFIG_HIGHPTE=y in .config?

-- Pasi

Re: 4.0.0 rc2: possible bugs

[Yasir Assam]

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Hi Pasi,

All the kernels are 64-bit.

Thanks,
Yasir
> On Tue, Feb 02, 2010 at 10:12:21PM +1100, Yasir Assam wrote:
>    
>> I built rc2 and used the pvops kernel pulled from git for dom0 (make
>> linux-2.6-pvops-build).
>>
>> dom0 runs much slower than the the vanilla kernel (without xen), and the
>> system as a whole, including the domUs I'm running, seems sluggish.
>>
>> More of a concern is that I'm getting random segfaults in the domUs. I
>> have 2 domUs running: one using the 2.6.18-xen (built for 3.4.2), and
>> another using kernel.org 2.6.32.7. I can't be sure it's not a hardware
>> problem (as I've also upgraded my MB) but both the RAM (tested with
>> Memtest86) and the HD (tested with the WD diagnostic tool) seem ok.
>>
>> Here's a sample of the domU segfaults (I can't reproduce them - they're
>> random):
>>
>> gnome-panel[3232]: segfault at 7f5264a27390 ip 00007f5263a8205d sp
>> 00007fff74ce9630 error 4 in libc-2.10.2.so[7f5263a11000+14a000]
>>
>> sshd[6373]: segfault at 000000ffadffd8ff rip 000000ffadffd8ff rsp
>> 00007fffb61abab8 error 14
>>
>> At one point I was using the dom0 kernel for one of the domUs and that
>> crashed a few times, so I switched to kernel.org's 2.6.32.7
>>
>> The domU using 2.6.18-xen has always been rock-solid before under 3.4.2
>> and earlier (it uses Debian Stable).
>>
>> Let me know if you want log/config files.
>>
>>      
> Is your pv_ops dom0 kernel 32bit? Is your kernel.org 2.6.32.7 kernel 32bit?
>
> If yes, do you have CONFIG_HIGHPTE=y in .config?
>
> -- Pasi
>    
>
>
>
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>    


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