[Xen-devel] RE: blue screen in windows balloon driver

[MaoXiaoyun <tinnycloud@xxxxxxxxxxx>]

I will have new driver tested.
Attached is the xentop snapshot.
 
thanks.
 
> Subject: RE: blue screen in windows balloon driver
> Date: Tue, 1 Mar 2011 23:11:14 +1100
> From: james.harper@xxxxxxxxxxxxxxxx
> To: tinnycloud@xxxxxxxxxxx
>
> >
> > exe attached, thanks.
> >
> > I have three machines, on each sum the *XenVbd_HwScsiResetBus* event.
> > 24 VMS, so
> > grep XenVbd_HwScsiResetBus qemu-dm-w3.MR_cp* | wc -l
> >
> > machine 25: VM easily got crash, the sum is 200
> > machine 23: VM never got crash, the sum is 10
> > machine 212: VM never got crash, the sum is 16
> >
> > it seems that machine 25 has much more XenVbd_HwScsiResetBus event
> > than other two machines.
> >
> > BTW, when start 24VM concurrently, the starting process is quite slow,
> takes
> > about 20 minutes more to whole started.
> >
> > I commented line 505 in xenpci_pdo.c to avoid t imed out.
> >
> > 505 //remaining -= thiswait;
> >
>
> It sounds like you are overloading your disk IO bandwidth. With many
> DomU's swapping heavily, Dom0 may simply not be able to keep up with the
> IO throughput required resulting in windows thinking that the scsi
> device isn't responding. Can you check xentop and see what sort of IO
> operations per second you are getting?
>
> I have just pushed a change to dump out the in-flight scsi requests
> (srb) when HwScsiResetBus is called. Please apply the patch and send me
> the next crash.
>
> Thanks
>
> James

Attachment: xentop.txt
Description: Text document

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