Re: [PATCH v3] vhost-user: Do not wait for reply for not sent VHOST_USER_SET_LOG_BASE

[BillXiang]

> From: "Michael S. Tsirkin"<mst@redhat.com>
> Date:  Thu, Aug 1, 2024, 22:13
> Subject:  Re: [PATCH v3] vhost-user: Do not wait for reply for not sent 
> VHOST_USER_SET_LOG_BASE
> To: "BillXiang"<xiangwencheng@dayudpu.com>
> Cc: <qemu-devel@nongnu.org>
> On Thu, Aug 01, 2024 at 08:45:40PM +0800, BillXiang wrote:
> > From: BillXiang <xiangwencheng@dayudpu.com>
> > 
> > Currently, we have added VHOST_USER_SET_LOG_BASE to 
> > vhost_user_per_device_request in commit 7c211eb078c4 
> > ("vhost-user: Skip unnecessary duplicated VHOST_USER_SET_LOG_BASE 
> > requests"), 
> > as a result, VHOST_USER_SET_LOG_BASE will be sent only once 
> > when 'vq_index == 0'.
> > In this patch we add the check of 'vq_index == 0' before 
> > vhost_user_read, such that we do not wait for reply for not
> > sent VHOST_USER_SET_LOG_BASE.
> > 
> > Signed-off-by: BillXiang <xiangwencheng@dayudpu.com>
> > ---
> >  hw/virtio/vhost-user.c | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/hw/virtio/vhost-user.c b/hw/virtio/vhost-user.c
> > index 00561daa06..fd12992d15 100644
> > --- a/hw/virtio/vhost-user.c
> > +++ b/hw/virtio/vhost-user.c
> > @@ -460,7 +460,7 @@ static int vhost_user_set_log_base(struct vhost_dev 
> > *dev, uint64_t base,
> >          return ret;
> >      }
> >  
> > -    if (shmfd) {
> > +    if (shmfd && (dev->vq_index == 0)) {
> >          msg.hdr.size = 0;
> >          ret = vhost_user_read(dev, &msg);
> >          if (ret < 0) {
> 
> 
> 
> How do things work now after 7c211eb078c4 then?

It does not really work after 7c211eb078c4 and it's my mistake. 
I forgot to submit the code to check vq_index in 7c211eb078c4.

> 
> > -- 
> > 2.30.0