Re: [PATCH resend] block: silently error unsupported empty barriers too

2009-10-23 Thread Mike Snitzer
On Thu, Sep 03 2009 at 11:47am -0400, Mark McLoughlin wrote: > With 2.6.31-rc5 in a KVM guest using dm and virtio_blk, we see the > following errors: > > end_request: I/O error, dev vda, sector 0 > end_request: I/O error, dev vda, sector 0 > > The errors go away if dm stops submitting empty

Re: [PATCH] virtio-pci: fix per-vq MSI-X request logic

2009-10-23 Thread Michael S. Tsirkin
On Thu, Oct 22, 2009 at 03:06:06PM +0200, Michael S. Tsirkin wrote: > Commit f68d24082e22ccee3077d11aeb6dc5354f0ca7f1 > in 2.6.32-rc1 broke requesting IRQs for per-VQ MSI-X vectors: > - vector number was used instead of the vector itself > - we try to request an IRQ for VQ which does not > have a

Re: INDIRECT and NEXT

2009-10-23 Thread Michael S. Tsirkin
On Fri, Oct 23, 2009 at 07:50:31PM +1030, Rusty Russell wrote: > On Fri, 23 Oct 2009 05:06:48 pm Michael S. Tsirkin wrote: > > On Fri, Oct 23, 2009 at 02:01:23PM +1030, Rusty Russell wrote: > > > Also, we have a limitation that you can't have more descriptors than the > > > ring > > > size, even w

Re: INDIRECT and NEXT

2009-10-23 Thread Rusty Russell
On Fri, 23 Oct 2009 05:06:48 pm Michael S. Tsirkin wrote: > On Fri, Oct 23, 2009 at 02:01:23PM +1030, Rusty Russell wrote: > > Also, we have a limitation that you can't have more descriptors than the > > ring > > size, even with indirect, due to overzealous checks... > > Yes ... so I wonder: do w