From: Xuan Ding Date: Mon, 9 May 2022 04:11:58 +0000 (+0000) Subject: doc: fix vhost multi-queue reconnection X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=5d4a6a437076c3ba6230a36b1d811ab69272fab6;p=dpdk.git doc: fix vhost multi-queue reconnection 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: stable@dpdk.org Signed-off-by: Xuan Ding Reviewed-by: Chenbo Xia --- diff --git a/doc/guides/rel_notes/known_issues.rst b/doc/guides/rel_notes/known_issues.rst index 187d9c942e..570550843a 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 +---------------------------------------------------------------------- **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.