Re: [RFC-v2 6/6] virtio-scsi: Fix incorrect VirtIOSCSI->cmd_vqs[0] definition

[Paolo Bonzini <pbonzini@redhat.com>]

Il 14/08/2012 22:20, Nicholas A. Bellinger ha scritto:
>>> > > Since virtio_scsi currently assumes a single vqs for data, this patch
>>> > > simply changes ->cmd_vqs[1] to handle the single VirtQueue.

Wrong, multiqueue works just fine. :)  It's just the kernel driver that
doesn't support it yet.

>>> > > Cc: Paolo Bonzini <pbonzini@redhat.com>
>>> > > Cc: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
>>> > > Cc: Michael S. Tsirkin <mst@redhat.com>
>>> > > Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
>> > 
>> > This is a bugfix we need even without vhost, right?
>> > 
> I believe so, as it appears to be stomping past the end of memory for
> every virtio-scsi initialization regardless of vhost usage.. 

You just did a wrong merge.  When commit d2ad7dd (virtio-scsi: add
multiqueue capability, 2012-04-06) changed cmd_vq from pointer to array
of pointers, you should have moved the following fields to the middle of
the struct, just like that commit did.

Paolo