Re: qemu-kvm-0.13.0 - winsows 2008 - chkdisk too slow

Avi Kivity
2011-01-06T10:50:18Z

On 01/06/2011 12:25 PM, Nikola Ciprich wrote:
> > Did you get 'overrun: something' reports from trace-cmd, where something
> > != 0?
> nope, all entries were 0.
>
> > Dan, is there a way to hijack the monitor so we can run some commands on
> > it? Things like 'info registers' and disassembly.
> AFAIK that's intentionally not possible :(
> pity..
>
> > Looks like vcpu 1 is spinning; perhaps that's normal. If you get hold
> > of the monitor, please disassemble around 0xfffff80001575d59.
> >
> > vcpu 0 is busy writing to vga (can you confirm)? looks like bank
> > switching is hitting synchronize_srcu_expedited(), which is known slow.
> > Unfortunately that only gets better in 2.6.38.
> I guess it might help if I would just risk killing the machine and run
> it without libvirt so we can debug better right?
> or even better, I'll try to reproduce on another 2K8 windows on testing
> machine and then we can play more with it.
> gimme a few minutes please..

Thanks, a test machine that we can do horrible things to would be best.

> >
> > You can try applying
> > http://git.kernel.org/?p=linux/kernel/git/sfr/linux-next.git;a=commit;h=46fdb0937f26124700fc9fc80da4776330cc00d3
> > and see if it helps.
> I'll also prepare testing kernel including this patch..
> BTW Is it just me, or is git.kernel.org pretty slow today?

2.6.37 is out, perhaps people are all over it.

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