From: Tonghao Zhang <xiangxia.m.yue@gmail.com> To: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com>, virtualization@lists.linux-foundation.org, Linux Kernel Network Developers <netdev@vger.kernel.org>, Willem de Bruijn <willemb@google.com> Subject: Re: [PATCH 1/2] virtio-net: don't disable guest csum when disable LRO Date: Tue, 29 Sep 2020 14:01:32 +0800 [thread overview] Message-ID: <CAMDZJNWtGBoiOsyzpPg8MK-YL=E+a4+fiV_cThrDpW-GY+fMMg@mail.gmail.com> (raw) In-Reply-To: <20200929015624-mutt-send-email-mst@kernel.org> On Tue, Sep 29, 2020 at 1:57 PM Michael S. Tsirkin <mst@redhat.com> wrote: > > On Tue, Sep 29, 2020 at 09:40:22AM +0800, Tonghao Zhang wrote: > > On Tue, Sep 29, 2020 at 3:21 AM Michael S. Tsirkin <mst@redhat.com> wrote: > > > > > > On Mon, Sep 28, 2020 at 11:39:14AM +0800, xiangxia.m.yue@gmail.com wrote: > > > > From: Tonghao Zhang <xiangxia.m.yue@gmail.com> > > > > > > > > Open vSwitch and Linux bridge will disable LRO of the interface > > > > when this interface added to them. Now when disable the LRO, the > > > > virtio-net csum is disable too. That drops the forwarding performance. > > > > > > > > Fixes: e59ff2c49ae1 ("virtio-net: disable guest csum during XDP set") > > > > > > I am a bit confused by this tag. Did this change bring about > > > disabling checksum when LRO is disabled? I am not sure > > > I follow how ... > > Hi Michael > > It's not right fix tag. > > The commit a02e8964eaf9 ("virtio-net: ethtool configurable LRO"), > > disable the csum, when we disable the LRO > > OK then, pls send a correct Fixes tag when you repost this ... Hi Michael I repost this patch, please review. thanks. http://patchwork.ozlabs.org/project/netdev/patch/20200929015806.19171-1-xiangxia.m.yue@gmail.com/ > > > > Cc: Michael S. Tsirkin <mst@redhat.com> > > > > Cc: Jason Wang <jasowang@redhat.com> > > > > Cc: Willem de Bruijn <willemb@google.com> > > > > Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com> > > > > --- > > > > drivers/net/virtio_net.c | 8 +++++++- > > > > 1 file changed, 7 insertions(+), 1 deletion(-) > > > > > > > > diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c > > > > index 7145c83c6c8c..21b71148c532 100644 > > > > --- a/drivers/net/virtio_net.c > > > > +++ b/drivers/net/virtio_net.c > > > > @@ -63,6 +63,11 @@ static const unsigned long guest_offloads[] = { > > > > VIRTIO_NET_F_GUEST_CSUM > > > > }; > > > > > > > > +#define GUEST_OFFLOAD_LRO_MASK ((1ULL << VIRTIO_NET_F_GUEST_TSO4) | \ > > > > + (1ULL << VIRTIO_NET_F_GUEST_TSO6) | \ > > > > + (1ULL << VIRTIO_NET_F_GUEST_ECN) | \ > > > > + (1ULL << VIRTIO_NET_F_GUEST_UFO)) > > > > + > > > > struct virtnet_stat_desc { > > > > char desc[ETH_GSTRING_LEN]; > > > > size_t offset; > > > > @@ -2531,7 +2536,8 @@ static int virtnet_set_features(struct net_device *dev, > > > > if (features & NETIF_F_LRO) > > > > offloads = vi->guest_offloads_capable; > > > > else > > > > - offloads = 0; > > > > + offloads = vi->guest_offloads_capable & > > > > + ~GUEST_OFFLOAD_LRO_MASK; > > > > > > > > err = virtnet_set_guest_offloads(vi, offloads); > > > > if (err) > > > > -- > > > > 2.23.0 > > > > > > > > > -- > > Best regards, Tonghao > -- Best regards, Tonghao
WARNING: multiple messages have this Message-ID (diff)
From: Tonghao Zhang <xiangxia.m.yue@gmail.com> To: "Michael S. Tsirkin" <mst@redhat.com> Cc: Linux Kernel Network Developers <netdev@vger.kernel.org>, Willem de Bruijn <willemb@google.com>, virtualization@lists.linux-foundation.org Subject: Re: [PATCH 1/2] virtio-net: don't disable guest csum when disable LRO Date: Tue, 29 Sep 2020 14:01:32 +0800 [thread overview] Message-ID: <CAMDZJNWtGBoiOsyzpPg8MK-YL=E+a4+fiV_cThrDpW-GY+fMMg@mail.gmail.com> (raw) In-Reply-To: <20200929015624-mutt-send-email-mst@kernel.org> On Tue, Sep 29, 2020 at 1:57 PM Michael S. Tsirkin <mst@redhat.com> wrote: > > On Tue, Sep 29, 2020 at 09:40:22AM +0800, Tonghao Zhang wrote: > > On Tue, Sep 29, 2020 at 3:21 AM Michael S. Tsirkin <mst@redhat.com> wrote: > > > > > > On Mon, Sep 28, 2020 at 11:39:14AM +0800, xiangxia.m.yue@gmail.com wrote: > > > > From: Tonghao Zhang <xiangxia.m.yue@gmail.com> > > > > > > > > Open vSwitch and Linux bridge will disable LRO of the interface > > > > when this interface added to them. Now when disable the LRO, the > > > > virtio-net csum is disable too. That drops the forwarding performance. > > > > > > > > Fixes: e59ff2c49ae1 ("virtio-net: disable guest csum during XDP set") > > > > > > I am a bit confused by this tag. Did this change bring about > > > disabling checksum when LRO is disabled? I am not sure > > > I follow how ... > > Hi Michael > > It's not right fix tag. > > The commit a02e8964eaf9 ("virtio-net: ethtool configurable LRO"), > > disable the csum, when we disable the LRO > > OK then, pls send a correct Fixes tag when you repost this ... Hi Michael I repost this patch, please review. thanks. http://patchwork.ozlabs.org/project/netdev/patch/20200929015806.19171-1-xiangxia.m.yue@gmail.com/ > > > > Cc: Michael S. Tsirkin <mst@redhat.com> > > > > Cc: Jason Wang <jasowang@redhat.com> > > > > Cc: Willem de Bruijn <willemb@google.com> > > > > Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com> > > > > --- > > > > drivers/net/virtio_net.c | 8 +++++++- > > > > 1 file changed, 7 insertions(+), 1 deletion(-) > > > > > > > > diff --git a/drivers/net/virtio_net.c b/drivers/net/virtio_net.c > > > > index 7145c83c6c8c..21b71148c532 100644 > > > > --- a/drivers/net/virtio_net.c > > > > +++ b/drivers/net/virtio_net.c > > > > @@ -63,6 +63,11 @@ static const unsigned long guest_offloads[] = { > > > > VIRTIO_NET_F_GUEST_CSUM > > > > }; > > > > > > > > +#define GUEST_OFFLOAD_LRO_MASK ((1ULL << VIRTIO_NET_F_GUEST_TSO4) | \ > > > > + (1ULL << VIRTIO_NET_F_GUEST_TSO6) | \ > > > > + (1ULL << VIRTIO_NET_F_GUEST_ECN) | \ > > > > + (1ULL << VIRTIO_NET_F_GUEST_UFO)) > > > > + > > > > struct virtnet_stat_desc { > > > > char desc[ETH_GSTRING_LEN]; > > > > size_t offset; > > > > @@ -2531,7 +2536,8 @@ static int virtnet_set_features(struct net_device *dev, > > > > if (features & NETIF_F_LRO) > > > > offloads = vi->guest_offloads_capable; > > > > else > > > > - offloads = 0; > > > > + offloads = vi->guest_offloads_capable & > > > > + ~GUEST_OFFLOAD_LRO_MASK; > > > > > > > > err = virtnet_set_guest_offloads(vi, offloads); > > > > if (err) > > > > -- > > > > 2.23.0 > > > > > > > > > -- > > Best regards, Tonghao > -- Best regards, Tonghao _______________________________________________ Virtualization mailing list Virtualization@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/virtualization
next prev parent reply other threads:[~2020-09-29 6:03 UTC|newest] Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-09-28 3:39 [PATCH 1/2] virtio-net: don't disable guest csum when disable LRO xiangxia.m.yue 2020-09-28 3:39 ` xiangxia.m.yue 2020-09-28 3:39 ` [PATCH 2/2] virtio-net: ethtool configurable RXCSUM xiangxia.m.yue 2020-09-28 3:39 ` xiangxia.m.yue 2020-09-28 8:38 ` Willem de Bruijn 2020-09-28 8:38 ` Willem de Bruijn 2020-09-28 9:22 ` Tonghao Zhang 2020-09-28 9:22 ` Tonghao Zhang 2020-09-28 19:25 ` Michael S. Tsirkin 2020-09-28 19:25 ` Michael S. Tsirkin 2020-09-29 1:45 ` Tonghao Zhang 2020-09-29 1:45 ` Tonghao Zhang 2020-09-29 5:55 ` Michael S. Tsirkin 2020-09-29 5:55 ` Michael S. Tsirkin 2020-09-29 6:10 ` Tonghao Zhang 2020-09-29 6:10 ` Tonghao Zhang 2020-09-29 6:22 ` Michael S. Tsirkin 2020-09-29 6:22 ` Michael S. Tsirkin 2020-09-29 7:17 ` Tonghao Zhang 2020-09-29 7:17 ` Tonghao Zhang 2020-09-29 7:25 ` Michael S. Tsirkin 2020-09-29 7:25 ` Michael S. Tsirkin 2020-09-30 2:09 ` Tonghao Zhang 2020-09-30 2:09 ` Tonghao Zhang 2020-09-28 8:34 ` [PATCH 1/2] virtio-net: don't disable guest csum when disable LRO Willem de Bruijn 2020-09-28 8:34 ` Willem de Bruijn 2020-09-28 9:21 ` Tonghao Zhang 2020-09-28 9:21 ` Tonghao Zhang 2020-09-28 19:21 ` Michael S. Tsirkin 2020-09-28 19:21 ` Michael S. Tsirkin 2020-09-29 1:40 ` Tonghao Zhang 2020-09-29 1:40 ` Tonghao Zhang 2020-09-29 5:56 ` Michael S. Tsirkin 2020-09-29 5:56 ` Michael S. Tsirkin 2020-09-29 6:01 ` Tonghao Zhang [this message] 2020-09-29 6:01 ` Tonghao Zhang
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