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From: "Xia, Chenbo" <chenbo.xia@intel.com>
To: Maxime Coquelin <maxime.coquelin@redhat.com>,
	"Hu, Jiayu" <jiayu.hu@intel.com>, "dev@dpdk.org" <dev@dpdk.org>
Cc: "Wang, Yinan" <yinan.wang@intel.com>,
	"Pai G, Sunil" <sunil.pai.g@intel.com>,
	"Jiang, Cheng1" <cheng1.jiang@intel.com>,
	"stable@dpdk.org" <stable@dpdk.org>
Subject: Re: [dpdk-dev] [PATCH v3 3/4] vhost: fix unnecessary vring_state_changed call
Date: Wed, 21 Apr 2021 01:36:13 +0000	[thread overview]
Message-ID: <MN2PR11MB4063532C09D70A910361190D9C479@MN2PR11MB4063.namprd11.prod.outlook.com> (raw)
In-Reply-To: <b03b37a6-961e-d8ff-d8fd-28b60c11bcc9@redhat.com>

Hi Maxime & Jiayu,

> -----Original Message-----
> From: Maxime Coquelin <maxime.coquelin@redhat.com>
> Sent: Tuesday, April 20, 2021 5:40 PM
> To: Hu, Jiayu <jiayu.hu@intel.com>; dev@dpdk.org; Xia, Chenbo
> <chenbo.xia@intel.com>
> Cc: Wang, Yinan <yinan.wang@intel.com>; Pai G, Sunil <sunil.pai.g@intel.com>;
> Jiang, Cheng1 <cheng1.jiang@intel.com>; stable@dpdk.org
> Subject: Re: [PATCH v3 3/4] vhost: fix unnecessary vring_state_changed call
> 
> 
> 
> On 4/20/21 10:57 AM, Jiayu Hu wrote:
> > When VHOST_USER_F_PROTOCOL_FEATURES is not negotiated,
> > there is no need for vhost_user_set_vring_kick() to
> > notify the application of vring enabled, as
> > vhost_user_msg_handler() also notifies the application.
> >
> > This patch is to remove unnecessary vring_state_changed() call.
> >
> > Fixes: 966027b4b3a3 ("vhost: fix silent queue enabling with legacy guests")
> 
> Sorry, I thought the vring_state_changed cb was introduced when Matan
> did the rework last year, but it is actually older.
> 
> If we backport the patch on v19.11, we will create a regression as it
> will revert Ilya's patch.
> 
> I think that your fix is correct only once Matan's series is present, so
> we should have below Fixes tag:
> 
> Fixes: d0fcc38f5fa4 ("vhost: improve device readiness notifications")
> 
> > Cc: stable@dpdk.org
> >
> > Signed-off-by: Jiayu Hu <jiayu.hu@intel.com>
> > Tested-by: Yinan Wang <yinan.wang@intel.com>
> > ---
> >  lib/librte_vhost/vhost_user.c | 3 ---
> >  1 file changed, 3 deletions(-)
> >
> > diff --git a/lib/librte_vhost/vhost_user.c b/lib/librte_vhost/vhost_user.c
> > index fa8929f..611ff20 100644
> > --- a/lib/librte_vhost/vhost_user.c
> > +++ b/lib/librte_vhost/vhost_user.c
> > @@ -1922,9 +1922,6 @@ vhost_user_set_vring_kick(struct virtio_net **pdev,
> struct VhostUserMsg *msg,
> >  	 */
> >  	if (!(dev->features & (1ULL << VHOST_USER_F_PROTOCOL_FEATURES))) {
> >  		vq->enabled = true;
> > -		if (dev->notify_ops->vring_state_changed)
> > -			dev->notify_ops->vring_state_changed(
> > -				dev->vid, file.index, 1);
> >  	}
> >
> >  	if (vq->ready) {
> >
> 
> With the fixes tag changed:
> Reviewed-by: Maxime Coquelin <maxime.coquelin@redhat.com>
> 
> Chanbo, can you change the Fixes tag while applying or Jiayu needs to
> send a new revision?

No worry. Will change fix tag while applying.

Thanks!
Chenbo

> 
> Thanks,
> Maxime


  reply	other threads:[~2021-04-21  1:36 UTC|newest]

Thread overview: 38+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-17 12:56 [dpdk-dev] [PATCH 0/4] Refactor async vhost control path Jiayu Hu
2021-03-17 12:56 ` [dpdk-dev] [PATCH 1/4] vhost: fix uninitialized vhost queue Jiayu Hu
2021-03-26 15:14   ` Maxime Coquelin
2021-03-17 12:56 ` [dpdk-dev] [PATCH 2/4] vhost: remove unnecessary free Jiayu Hu
2021-03-29 15:03   ` Maxime Coquelin
2021-03-17 12:56 ` [dpdk-dev] [PATCH 3/4] vhost: avoid deadlock on async register Jiayu Hu
2021-03-29 15:19   ` Maxime Coquelin
2021-03-30  1:20     ` Hu, Jiayu
2021-04-13  9:37       ` Maxime Coquelin
2021-03-17 12:56 ` [dpdk-dev] [PATCH 4/4] doc: update async vhost register/unregister Jiayu Hu
2021-04-02 13:03 ` [dpdk-dev] [PATCH v2 0/4] Refactor async vhost control path Jiayu Hu
2021-04-02  8:06   ` Wang, Yinan
2021-04-02 13:03   ` [dpdk-dev] [PATCH v2 1/4] vhost: fix uninitialized vhost queue Jiayu Hu
2021-04-13 11:30     ` Maxime Coquelin
2021-04-02 13:04   ` [dpdk-dev] [PATCH v2 2/4] vhost: remove unnecessary free Jiayu Hu
2021-04-02 13:04   ` [dpdk-dev] [PATCH v2 3/4] vhost: avoid deadlock on async register Jiayu Hu
2021-04-13 11:33     ` Maxime Coquelin
2021-04-14  1:40       ` Hu, Jiayu
2021-04-14 10:08         ` Maxime Coquelin
2021-04-15  1:08           ` Hu, Jiayu
2021-04-15  7:09             ` Maxime Coquelin
2021-04-16  2:19               ` Hu, Jiayu
2021-04-16  6:35                 ` Maxime Coquelin
2021-04-16  8:18                   ` Hu, Jiayu
2021-04-16  8:33                     ` Maxime Coquelin
2021-04-19  4:10                       ` Hu, Jiayu
2021-04-19  7:13                         ` Maxime Coquelin
2021-04-19  9:02                           ` Hu, Jiayu
2021-04-02 13:04   ` [dpdk-dev] [PATCH v2 4/4] doc: update async vhost register/unregister Jiayu Hu
2021-04-20  8:57   ` [dpdk-dev] [PATCH v3 0/4] Refactor async vhost control path Jiayu Hu
2021-04-20  8:57     ` [dpdk-dev] [PATCH v3 1/4] vhost: fix uninitialized vhost queue Jiayu Hu
2021-04-20  8:57     ` [dpdk-dev] [PATCH v3 2/4] vhost: remove unnecessary free Jiayu Hu
2021-04-20  8:57     ` [dpdk-dev] [PATCH v3 3/4] vhost: fix unnecessary vring_state_changed call Jiayu Hu
2021-04-20  9:39       ` Maxime Coquelin
2021-04-21  1:36         ` Xia, Chenbo [this message]
2021-04-20  8:57     ` [dpdk-dev] [PATCH v3 4/4] doc: update async vhost register/unregister Jiayu Hu
2021-04-20  9:31       ` Maxime Coquelin
2021-04-28  2:05     ` [dpdk-dev] [PATCH v3 0/4] Refactor async vhost control path Xia, Chenbo

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