Re: [Qemu-devel] [PATCH v8 00/27] vhost-user: add migration support

["Michael S. Tsirkin" <mst@redhat.com>]

On Tue, Oct 20, 2015 at 08:30:49AM +0200, Thibaut Collet wrote:
> On Mon, Oct 19, 2015 at 11:12 PM, Michael S. Tsirkin <mst@redhat.com> wrote:
> > On Mon, Oct 19, 2015 at 06:42:43PM +0200, Thibaut Collet wrote:
> >> >
> >> > Can you pls check refs/heads/for_thibaut?
> >> > It should have your patch as the latest commit.
> >>
> >> I do not see yet my patch on the for_thibaut branch
> >
> > Ouch. I meant refs/tags/for_thibaut.
> > Sorry about that.
> >
> >
> 
> Sorry for the incorrect wording (I write to quickly my email and use
> the word branch rather than tag). I use the for_thibaut tag for my
> live migration test. The fixup for the double definition of
> vhost_kernel_get_vq_index function id for this tag.
> To do successfully live migration in any conditions I have removed
> this double definition and apply the recent sending patch "vhost: set
> the correct queue index in case of migration with multiqueue"
> 
> When you say " It should have your patch as the latest commit." you
> think about which patch ? The
> "0001-FIXUP-vhost-user-add-support-of-live-migration.patch" one or the
> "vhost: set the correct queue index in case of migration with
> multiqueue" one ?
> 
> Regards.
> 
> Thibaut.


This is where for_thibaut points at for me:

commit bf6830e2416f67571ee2e7196f3625725adec170
Author: Thibaut Collet <thibaut.collet@6wind.com>
Date:   Mon Oct 19 14:59:27 2015 +0200

    vhost: set the correct queue index in case of migration with multiqueue
    
    When a live migration is started the log address to mark dirty pages is provided
    to the vhost backend through the vhost_dev_set_log function.
    This function is called for each queue pairs but the queue index is wrongly set:
    always set to the first queue pair. Then vhost backend lost descriptor addresses
    of the queue pairs greater than 1 and behaviour of the vhost backend is
    unpredictable.
    
    The queue index is computed by taking account of the vq_index (to retrieve the
    queue pair index) and calling the vhost_get_vq_index method of the backend.
    
    Signed-off-by: Thibaut Collet <thibaut.collet@6wind.com>


hash might change if I find any issues.

If this is not what you see, you need to re-fetch the tag.

Please let me know whether this tag works for you.

-- 
MST