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xen-devel
[Xen-devel] RE: blue screen in windows balloon driver
Hold off on testing. I'm fixing up the reset code so that it does what
Windows wants. I'll post something soon if it doesn't take too long.
James
> -----Original Message-----
> From: MaoXiaoyun [mailto:tinnycloud@xxxxxxxxxxx]
> Sent: Tuesday, 1 March 2011 23:34
> To: James Harper
> Cc: xen devel
> Subject: RE: blue screen in windows balloon driver
>
> 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 timed 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
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