Re: [Qemu-devel] Windows Virtio Issue

[Vadim Rozenfeld <vrozenfe@redhat.com>]

On Monday, March 26, 2012 02:45:34 PM Paul Fisher wrote:
> On 26 March 2012 09:50, Vadim Rozenfeld <vrozenfe@redhat.com> wrote:
> > On Sunday, March 25, 2012 07:01:54 PM Yan Vugenfirer wrote:
> > Hi Paul,
> > Could you try reproducing this problem on "-smp 2" guest, with
> > small memory dump option turned on, instead of kernel memory dump.
> > 
> > Thanks,
> > Vadim.
> 
> Hi Vadim.
> 
> Thank you kindly for getting back to me.
> 
> I can certainly do that:
> 
> Dump and BSOD are in a zip at
> http://dl.dropbox.com/u/12332019/2200-VirtioBSOD-2.zip
> 
> This time running with 2 cores:
> 
> qemu-kvm -m 1024 -smp sockets=1,cores=2 -cpu host -nodefaults -vga cirrus
> -vnc :1  -drive if=none,id=block.0,format=raw,
> cache=writeback,file=drive.img -device
> virtio-blk-pci,bootindex=1,drive=block.0 -monitor stdio
> 
> Same procedure to get it to break - run crystal disk mark. Passed the
> stream read/write and 512k block read/write - broke at the seek intensive
> 4k level.
> 
> Regards,
> Paul

Hi Paul,
Managed to reproduce this problem, thank you. Going to fix it in the build.
Meanwhile, instead of writeback, could you  try cache=off ?

Best regards,
Vadim.