search for: 2f3c57c

...dx; > +} > +EXPORT_SYMBOL_GPL(vhost_vq_more_avail); > + > /* OK, now we need to know about added descriptors. */ > bool vhost_enable_notify(struct vhost_dev *dev, struct vhost_virtqueue *vq) > { > diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h > index 43284ad..2f3c57c 100644 > --- a/drivers/vhost/vhost.h > +++ b/drivers/vhost/vhost.h > @@ -159,6 +159,7 @@ void vhost_add_used_and_signal_n(struct vhost_dev *, struct vhost_virtqueue *, > struct vring_used_elem *heads, unsigned count); > void vhost_signal(struct vhost_dev *, struct vhost_v...

...dx; > +} > +EXPORT_SYMBOL_GPL(vhost_vq_more_avail); > + > /* OK, now we need to know about added descriptors. */ > bool vhost_enable_notify(struct vhost_dev *dev, struct vhost_virtqueue *vq) > { > diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h > index 43284ad..2f3c57c 100644 > --- a/drivers/vhost/vhost.h > +++ b/drivers/vhost/vhost.h > @@ -159,6 +159,7 @@ void vhost_add_used_and_signal_n(struct vhost_dev *, struct vhost_virtqueue *, > struct vring_used_elem *heads, unsigned count); > void vhost_signal(struct vhost_dev *, struct vhost_v...

Hi all: This series tries to add basic busy polling for vhost net. The idea is simple: at the end of tx/rx processing, busy polling for new tx added descriptor and rx receive socket for a while. The maximum number of time (in us) could be spent on busy polling was specified ioctl. Test A were done through: - 50 us as busy loop timeout - Netperf 2.6 - Two machines with back to back connected

Hi all: This series tries to add basic busy polling for vhost net. The idea is simple: at the end of tx/rx processing, busy polling for new tx added descriptor and rx receive socket for a while. The maximum number of time (in us) could be spent on busy polling was specified ioctl. Test A were done through: - 50 us as busy loop timeout - Netperf 2.6 - Two machines with back to back connected

...> This path does need an error though. > It's probably easier to just leave this call site alone. Ok, will leave this function as is and remove the vq_err() in vhost_vq_more_avail(). Thanks > >> diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h >> index 43284ad..2f3c57c 100644 >> --- a/drivers/vhost/vhost.h >> +++ b/drivers/vhost/vhost.h >> @@ -159,6 +159,7 @@ void vhost_add_used_and_signal_n(struct vhost_dev *, struct vhost_virtqueue *, >> struct vring_used_elem *heads, unsigned count); >> void vhost_signal(struct vhost_d...

..._to_cpu(vq, avail_idx) != vq->avail_idx; +} +EXPORT_SYMBOL_GPL(vhost_vq_more_avail); + /* OK, now we need to know about added descriptors. */ bool vhost_enable_notify(struct vhost_dev *dev, struct vhost_virtqueue *vq) { diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h index 43284ad..2f3c57c 100644 --- a/drivers/vhost/vhost.h +++ b/drivers/vhost/vhost.h @@ -159,6 +159,7 @@ void vhost_add_used_and_signal_n(struct vhost_dev *, struct vhost_virtqueue *, struct vring_used_elem *heads, unsigned count); void vhost_signal(struct vhost_dev *, struct vhost_virtqueue *); void vhost_...

...> This path does need an error though. > It's probably easier to just leave this call site alone. Ok, will leave this function as is and remove the vq_err() in vhost_vq_more_avail(). Thanks > >> diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h >> index 43284ad..2f3c57c 100644 >> --- a/drivers/vhost/vhost.h >> +++ b/drivers/vhost/vhost.h >> @@ -159,6 +159,7 @@ void vhost_add_used_and_signal_n(struct vhost_dev *, struct vhost_virtqueue *, >> struct vring_used_elem *heads, unsigned count); >> void vhost_signal(struct vhost_d...

...out = t.timeout; + break; + case VHOST_GET_VRING_BUSYLOOP_TIMEOUT: + t.index = idx; + t.timeout = vq->busyloop_timeout; + if (copy_to_user(argp, &t, sizeof(t))) + r = -EFAULT; + break; default: r = -ENOIOCTLCMD; } diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h index 2f3c57c..4b7d4fa 100644 --- a/drivers/vhost/vhost.h +++ b/drivers/vhost/vhost.h @@ -115,6 +115,7 @@ struct vhost_virtqueue { /* Ring endianness requested by userspace for cross-endian support. */ bool user_be; #endif + u32 busyloop_timeout; }; struct vhost_dev { diff --git a/include/uapi/linux/vho...

...BUSYLOOP_TIMEOUT: > + t.index = idx; > + t.timeout = vq->busyloop_timeout; > + if (copy_to_user(argp, &t, sizeof(t))) > + r = -EFAULT; > + break; > default: > r = -ENOIOCTLCMD; > } > diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h > index 2f3c57c..4b7d4fa 100644 > --- a/drivers/vhost/vhost.h > +++ b/drivers/vhost/vhost.h > @@ -115,6 +115,7 @@ struct vhost_virtqueue { > /* Ring endianness requested by userspace for cross-endian support. */ > bool user_be; > #endif > + u32 busyloop_timeout; > }; > > stru...

...BUSYLOOP_TIMEOUT: > + t.index = idx; > + t.timeout = vq->busyloop_timeout; > + if (copy_to_user(argp, &t, sizeof(t))) > + r = -EFAULT; > + break; > default: > r = -ENOIOCTLCMD; > } > diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h > index 2f3c57c..4b7d4fa 100644 > --- a/drivers/vhost/vhost.h > +++ b/drivers/vhost/vhost.h > @@ -115,6 +115,7 @@ struct vhost_virtqueue { > /* Ring endianness requested by userspace for cross-endian support. */ > bool user_be; > #endif > + u32 busyloop_timeout; > }; > > stru...