Re: [Xen-devel] Need help with fixing the Xen waitqueue feature

[Keir Fraser <keir.xen@xxxxxxxxx>]

On 23/11/2011 22:30, "Olaf Hering" <olaf@xxxxxxxxx> wrote:

> After the vcpu hung I killed the guest and tried to start a new one.
> Oddly enough I wasnt able to fully kill the guest, it remained in --p--d
> state. Most vcpus were in paused state before that.

Dying but kept as a zombie by memory references...

> In another attempt I was able to run firefox in a guest. But after
> trying to open all "latest headlines" in tabs the guest crashed. qemu-dm
> log had alot of this (but nothing in xen dmesg):
> track_dirty_vram(f0000000, 12c) failed (-1, 3)
> 
> xl vcpu-list shows
> (null)                               1     0    -   --p      47.3  any cpu
> (null)                               1     1   12   ---      13.4  any cpu
> (null)                               1     2    -   --p       4.3  any cpu
> (null)                               1     3    -   --p       7.8  any cpu
> (null)                               1     4    -   --p       3.5  any cpu
> (null)                               1     5    -   --p       1.9  any cpu
> (null)                               1     6    -   --p       1.6  any cpu
> (null)                               1     7    -   --p       1.4  any cpu
> 
> Hmm, qemu-dm doesnt get killed in all cases, killing it destroys the guest..
> I have seen that before already.

...from qemu-dm. Problem is that toolstack is not killing qemu-dm, or
qemu-dm is not responding to some shutdown signal.

> I will provide more test results tomorrow.

Thanks.

 -- Keir



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