Hi Chenbo, > -----Original Message----- > From: Xia, Chenbo <chenbo....@intel.com> > Sent: Friday, May 6, 2022 4:41 PM > To: Ding, Xuan <xuan.d...@intel.com>; maxime.coque...@redhat.com > Cc: dev@dpdk.org; Hu, Jiayu <jiayu...@intel.com>; sta...@dpdk.org > Subject: RE: [PATCH v3] doc: fix vhost multi-queue reconnection > > > -----Original Message----- > > From: Ding, Xuan <xuan.d...@intel.com> > > Sent: Friday, April 15, 2022 10:08 AM > > To: maxime.coque...@redhat.com; Xia, Chenbo <chenbo....@intel.com> > > Cc: dev@dpdk.org; Hu, Jiayu <jiayu...@intel.com>; Ding, Xuan > > <xuan.d...@intel.com>; sta...@dpdk.org > > Subject: [PATCH v3] doc: fix vhost multi-queue reconnection > > > > From: Xuan Ding <xuan.d...@intel.com> > > > > Since QEMU 5.2.0 fixes the vhost split ring multi-queue reconnection > > issue in commit f66337bdbfda ("vhost-user: save features of > > multiqueues if chardev is closed"), this patch updates known issue to > > indicate the range of affeacted QEMU versions. > > > > Fixes: b37e95507e1b ("doc: add vhost multi-queue reconnection issue") > > Cc: sta...@dpdk.org > > > > Signed-off-by: Xuan Ding <xuan.d...@intel.com> > > --- > > v3: > > * Updated affected QEMU versions. > > > > v2: > > * Add fixes in commit title and log. > > --- > > doc/guides/rel_notes/known_issues.rst | 7 ++++--- > > 1 file changed, 4 insertions(+), 3 deletions(-) > > > > diff --git a/doc/guides/rel_notes/known_issues.rst > > b/doc/guides/rel_notes/known_issues.rst > > index 187d9c942e..bd89d58d24 100644 > > --- a/doc/guides/rel_notes/known_issues.rst > > +++ b/doc/guides/rel_notes/known_issues.rst > > @@ -885,14 +885,15 @@ Unsuitable IOVA mode may be picked as the > > default > > **Driver/Module**: > > ALL. > > > > -Vhost multi-queue reconnection failed with QEMU version >= 4.2.0 > > ----------------------------------------------------------------- > > +Vhost multi-queue reconnection failed with QEMU version 4.2.0 to > > +5.1.0- > > rc3 > > So 5.1.0 fixes the problem or not? As 5.1.0 is later than 5.1.0-rc3 but you > said > from 5.2.0 it's fixed. And I think we should just mention formal release, not > any rc, qemu users should not use any rc for formal usage.
Thanks for your catch. The tag here is wrong(actually 5.2.0-rc0). So the actual fixed version is in 5.2.0. I will fix it in next version. Regards, Xuan > > Thanks, > Chenbo > > > +--------------------------------------------------------------------- > > +---- > > - > > > > **Description** > > It's a QEMU regression bug (bad commit: c6beefd674ff). QEMU only > saves > > acked features for one vhost-net when vhost quits. When vhost > > reconnects > > to virtio-net/virtio-pmd in multi-queue situations, the features been > > - set multiple times are not consistent. > > + set multiple times are not consistent. QEMU-5.2.0 fixes this issue > > + in > > commit > > + f66337bdbfda ("vhost-user: save features of multiqueues if chardev > > + is > > closed"). > > > > **Implication** > > Vhost cannot reconnect back to virtio-net/virtio-pmd normally. > > -- > > 2.17.1