interests in bugs for 2.6.16?

interests in bugs for 2.6.16?

[Martin Vogt]

Hello,

I'm running kvm-79 on SLES 10, which has a 2.6.16.
I see simple hangs (nothing happens anymore) in my kvm-virtual machine.

I never have these hangs on 2.6.27.
The hangs seem to be related to qcow2 images on local and on NFS disks.
When I uses iscsi as disk the hangs do not occur.
(At least I can't remember any)

Is there some interest in those "bugs" for these old kernel 2.6.16?
Then I can try to find out more.

But I would need some link/HOWTO to start debugging kvm.

regards,

Martin

Re: interests in bugs for 2.6.16?

[Martin Vogt]

Martin Vogt wrote:
> I'm running kvm-79 on SLES 10, which has a 2.6.16.
> I see simple hangs (nothing happens anymore) in my kvm-virtual machine.

I have played a bit with the command line switches:

-no-kvm-irqchip

seems to be the cure, if I want to boot SuSE 11.1b4 from SLES 10 (2.6.16).

Martin

Re: interests in bugs for 2.6.16?

[Avi Kivity]

Martin Vogt wrote:
> Hello,
>
> I'm running kvm-79 on SLES 10, which has a 2.6.16.
> I see simple hangs (nothing happens anymore) in my kvm-virtual machine.
>
> I never have these hangs on 2.6.27.
> The hangs seem to be related to qcow2 images on local and on NFS disks.
> When I uses iscsi as disk the hangs do not occur.
> (At least I can't remember any)
>
> Is there some interest in those "bugs" for these old kernel 2.6.16?
> Then I can try to find out more.
>
>   

We definitely want to improve support on older kernels.

> But I would need some link/HOWTO to start debugging kvm.
>   

This is difficult, unfortunately, and varies from bug to bug.

In this case I'd try running 2.6.17 and up, see which is the first 
kernel that works.  This is a time consuming procedure, but once we know 
which kernel works and which doesn't, we can look at the differences in 
APIs and see whether something interesting is missing in the older kernel.

-- 
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