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...igned-off-by: Jason Wang <jasowang at redhat.com> --- drivers/virtio/virtio_ring.c | 22 ++++++++++++++++++++-- include/linux/virtio.h | 2 ++ 2 files changed, 22 insertions(+), 2 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 1b3929f..d67fbf8 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -567,14 +567,32 @@ unsigned virtqueue_enable_cb_prepare(struct virtqueue *_vq) * entry. Always do both to keep code simple. */ vq->vring.avail->flags &= ~VRING_AVAIL_F_NO_INTERRUPT; /* Make sure used ev...

...igned-off-by: Jason Wang <jasowang at redhat.com> --- drivers/virtio/virtio_ring.c | 22 ++++++++++++++++++++-- include/linux/virtio.h | 2 ++ 2 files changed, 22 insertions(+), 2 deletions(-) diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c index 1b3929f..d67fbf8 100644 --- a/drivers/virtio/virtio_ring.c +++ b/drivers/virtio/virtio_ring.c @@ -567,14 +567,32 @@ unsigned virtqueue_enable_cb_prepare(struct virtqueue *_vq) * entry. Always do both to keep code simple. */ vq->vring.avail->flags &= ~VRING_AVAIL_F_NO_INTERRUPT; /* Make sure used ev...

...t; --- >> drivers/virtio/virtio_ring.c | 22 ++++++++++++++++++++-- >> include/linux/virtio.h | 2 ++ >> 2 files changed, 22 insertions(+), 2 deletions(-) >> >> diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c >> index 1b3929f..d67fbf8 100644 >> --- a/drivers/virtio/virtio_ring.c >> +++ b/drivers/virtio/virtio_ring.c >> @@ -567,14 +567,32 @@ unsigned virtqueue_enable_cb_prepare(struct virtqueue *_vq) >> * entry. Always do both to keep code simple. */ >> vq->vring.avail->flags &= ~VRING...

...t; --- >> drivers/virtio/virtio_ring.c | 22 ++++++++++++++++++++-- >> include/linux/virtio.h | 2 ++ >> 2 files changed, 22 insertions(+), 2 deletions(-) >> >> diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c >> index 1b3929f..d67fbf8 100644 >> --- a/drivers/virtio/virtio_ring.c >> +++ b/drivers/virtio/virtio_ring.c >> @@ -567,14 +567,32 @@ unsigned virtqueue_enable_cb_prepare(struct virtqueue *_vq) >> * entry. Always do both to keep code simple. */ >> vq->vring.avail->flags &= ~VRING...

...ing.c | 22 ++++++++++++++++++++-- >>>> include/linux/virtio.h | 2 ++ >>>> 2 files changed, 22 insertions(+), 2 deletions(-) >>>> >>>> diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c >>>> index 1b3929f..d67fbf8 100644 >>>> --- a/drivers/virtio/virtio_ring.c >>>> +++ b/drivers/virtio/virtio_ring.c >>>> @@ -567,14 +567,32 @@ unsigned virtqueue_enable_cb_prepare(struct virtqueue *_vq) >>>> * entry. Always do both to keep code simple. */ >>>> vq...

...ing.c | 22 ++++++++++++++++++++-- >>>> include/linux/virtio.h | 2 ++ >>>> 2 files changed, 22 insertions(+), 2 deletions(-) >>>> >>>> diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c >>>> index 1b3929f..d67fbf8 100644 >>>> --- a/drivers/virtio/virtio_ring.c >>>> +++ b/drivers/virtio/virtio_ring.c >>>> @@ -567,14 +567,32 @@ unsigned virtqueue_enable_cb_prepare(struct virtqueue *_vq) >>>> * entry. Always do both to keep code simple. */ >>>> vq...

...ng at redhat.com> > --- > drivers/virtio/virtio_ring.c | 22 ++++++++++++++++++++-- > include/linux/virtio.h | 2 ++ > 2 files changed, 22 insertions(+), 2 deletions(-) > > diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c > index 1b3929f..d67fbf8 100644 > --- a/drivers/virtio/virtio_ring.c > +++ b/drivers/virtio/virtio_ring.c > @@ -567,14 +567,32 @@ unsigned virtqueue_enable_cb_prepare(struct virtqueue *_vq) > * entry. Always do both to keep code simple. */ > vq->vring.avail->flags &= ~VRING_AVAIL_F_NO_INTERRUP...

...virtio/virtio_ring.c | 22 ++++++++++++++++++++-- > >> include/linux/virtio.h | 2 ++ > >> 2 files changed, 22 insertions(+), 2 deletions(-) > >> > >> diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c > >> index 1b3929f..d67fbf8 100644 > >> --- a/drivers/virtio/virtio_ring.c > >> +++ b/drivers/virtio/virtio_ring.c > >> @@ -567,14 +567,32 @@ unsigned virtqueue_enable_cb_prepare(struct virtqueue *_vq) > >> * entry. Always do both to keep code simple. */ > >> vq->vring.avai...

According to David, proper accounting and queueing (at all levels, not just TCP sockets) is more important than trying to skim a bunch of cycles by avoiding TX interrupts. Having an event to free the SKB is absolutely essential for the stack to operate correctly. This series tries to enable tx interrupt for virtio-net. The idea is simple: enable tx interrupt and schedule a tx napi to free old

According to David, proper accounting and queueing (at all levels, not just TCP sockets) is more important than trying to skim a bunch of cycles by avoiding TX interrupts. Having an event to free the SKB is absolutely essential for the stack to operate correctly. This series tries to enable tx interrupt for virtio-net. The idea is simple: enable tx interrupt and schedule a tx napi to free old