search for: vhost_used_elem

...port (compile test only). - Zerocopy support. - vIOMMU support. - SCSI/VSOCK support (compile test only). - Fix several bugs Jason Wang (8): vhost: move get_rx_bufs to vhost.c vhost: hide used ring layout from device vhost: do not use vring_used_elem vhost_net: do not explicitly manipulate vhost_used_elem vhost: vhost_put_user() can accept metadata type vhost: packed ring support vhost: event suppression for packed ring vhost: enable packed virtqueues drivers/vhost/net.c | 143 ++----- drivers/vhost/scsi.c | 62 +-- drivers/vhost/vhost.c | 994 +++++++++++++++++++++++++++...

...port (compile test only). - Zerocopy support. - vIOMMU support. - SCSI/VSOCK support (compile test only). - Fix several bugs Jason Wang (8): vhost: move get_rx_bufs to vhost.c vhost: hide used ring layout from device vhost: do not use vring_used_elem vhost_net: do not explicitly manipulate vhost_used_elem vhost: vhost_put_user() can accept metadata type vhost: packed ring support vhost: event suppression for packed ring vhost: enable packed virtqueues drivers/vhost/net.c | 143 ++----- drivers/vhost/scsi.c | 62 +-- drivers/vhost/vhost.c | 994 +++++++++++++++++++++++++++...

...st only). - Fix several bugs For simplicity, I don't implement batching or other optimizations. Please review. Thanks Jason Wang (8): vhost: move get_rx_bufs to vhost.c vhost: hide used ring layout from device vhost: do not use vring_used_elem vhost_net: do not explicitly manipulate vhost_used_elem vhost: vhost_put_user() can accept metadata type virtio: introduce packed ring defines vhost: packed ring support vhost: event suppression for packed ring drivers/vhost/net.c | 138 ++----- drivers/vhost/scsi.c | 62 +-- drivers/vhost/vhost.c | 8...

...st only). - Fix several bugs For simplicity, I don't implement batching or other optimizations. Please review. Thanks Jason Wang (8): vhost: move get_rx_bufs to vhost.c vhost: hide used ring layout from device vhost: do not use vring_used_elem vhost_net: do not explicitly manipulate vhost_used_elem vhost: vhost_put_user() can accept metadata type virtio: introduce packed ring defines vhost: packed ring support vhost: event suppression for packed ring drivers/vhost/net.c | 138 ++----- drivers/vhost/scsi.c | 62 +-- drivers/vhost/vhost.c | 8...

...port (compile test only). - Zerocopy support. - vIOMMU support. - SCSI/VSOCK support (compile test only). - Fix several bugs Jason Wang (8): vhost: move get_rx_bufs to vhost.c vhost: hide used ring layout from device vhost: do not use vring_used_elem vhost_net: do not explicitly manipulate vhost_used_elem vhost: vhost_put_user() can accept metadata type virtio: introduce packed ring defines vhost: packed ring support vhost: event suppression for packed ring drivers/vhost/net.c | 144 ++---- drivers/vhost/scsi.c | 62 +-- drivers/vhost/vhost.c | 92...

...port (compile test only). - Zerocopy support. - vIOMMU support. - SCSI/VSOCK support (compile test only). - Fix several bugs Jason Wang (8): vhost: move get_rx_bufs to vhost.c vhost: hide used ring layout from device vhost: do not use vring_used_elem vhost_net: do not explicitly manipulate vhost_used_elem vhost: vhost_put_user() can accept metadata type virtio: introduce packed ring defines vhost: packed ring support vhost: event suppression for packed ring drivers/vhost/net.c | 136 ++---- drivers/vhost/scsi.c | 62 +-- drivers/vhost/vhost.c | 86...

...port (compile test only). - Zerocopy support. - vIOMMU support. - SCSI/VSOCK support (compile test only). - Fix several bugs Jason Wang (8): vhost: move get_rx_bufs to vhost.c vhost: hide used ring layout from device vhost: do not use vring_used_elem vhost_net: do not explicitly manipulate vhost_used_elem vhost: vhost_put_user() can accept metadata type virtio: introduce packed ring defines vhost: packed ring support vhost: event suppression for packed ring drivers/vhost/net.c | 136 ++---- drivers/vhost/scsi.c | 62 +-- drivers/vhost/vhost.c | 86...

...mpile test only). - Fix several bugs For simplicity, I don't implement batching or other optimizations. Please review. Jason Wang (8): vhost: move get_rx_bufs to vhost.c vhost: hide used ring layout from device vhost: do not use vring_used_elem vhost_net: do not explicitly manipulate vhost_used_elem vhost: vhost_put_user() can accept metadata type virtio: introduce packed ring defines vhost: packed ring support vhost: event suppression for packed ring drivers/vhost/net.c | 136 ++---- drivers/vhost/scsi.c | 62 +-- drivers/vhost/vhost.c | 82...

...mpile test only). - Fix several bugs For simplicity, I don't implement batching or other optimizations. Please review. Jason Wang (8): vhost: move get_rx_bufs to vhost.c vhost: hide used ring layout from device vhost: do not use vring_used_elem vhost_net: do not explicitly manipulate vhost_used_elem vhost: vhost_put_user() can accept metadata type virtio: introduce packed ring defines vhost: packed ring support vhost: event suppression for packed ring drivers/vhost/net.c | 136 ++---- drivers/vhost/scsi.c | 62 +-- drivers/vhost/vhost.c | 82...

...iscard_vq_desc(vq, 1); + vhost_discard_vq_desc(vq, &used, 1); vhost_net_enable_vq(net, vq); break; } @@ -755,10 +755,12 @@ static void handle_rx(struct vhost_net *net) while ((sock_len = vhost_net_rx_peek_head_len(net, sock->sk, &busyloop_intr))) { + struct vhost_used_elem *used = vq->heads + nvq->done_idx; + sock_len += sock_hlen; vhost_len = sock_len + vhost_hlen; - err = vhost_get_bufs(vq, vq->heads + nvq->done_idx, - vhost_len, &in, vq_log, &log, + err = vhost_get_bufs(vq, used, vhost_len, + &in, vq_log, &log,...

Hi all: This series implements packed virtqueues which were described at [1]. In this version we try to address the performance regression saw by V2. The root cause is packed virtqueue need more times of userspace memory accesssing which turns out to be very expensive. Thanks to the help of 7f466032dc9e ("vhost: access vq metadata through kernel virtual address"), such overhead cold be

Hi all: This series implements packed virtqueues which were described at [1]. In this version we try to address the performance regression saw by V2. The root cause is packed virtqueue need more times of userspace memory accesssing which turns out to be very expensive. Thanks to the help of 7f466032dc9e ("vhost: access vq metadata through kernel virtual address"), such overhead cold be

...port (compile test only). - Zerocopy support. - vIOMMU support. - SCSI/VSOCK support (compile test only). - Fix several bugs Jason Wang (8): vhost: move get_rx_bufs to vhost.c vhost: hide used ring layout from device vhost: do not use vring_used_elem vhost_net: do not explicitly manipulate vhost_used_elem vhost: vhost_put_user() can accept metadata type virtio: introduce packed ring defines vhost: packed ring support vhost: event suppression for packed ring drivers/vhost/net.c | 144 ++---- drivers/vhost/scsi.c | 62 +-- drivers/vhost/vhost.c | 99...

...port (compile test only). - Zerocopy support. - vIOMMU support. - SCSI/VSOCK support (compile test only). - Fix several bugs Jason Wang (8): vhost: move get_rx_bufs to vhost.c vhost: hide used ring layout from device vhost: do not use vring_used_elem vhost_net: do not explicitly manipulate vhost_used_elem vhost: vhost_put_user() can accept metadata type virtio: introduce packed ring defines vhost: packed ring support vhost: event suppression for packed ring drivers/vhost/net.c | 144 ++---- drivers/vhost/scsi.c | 62 +-- drivers/vhost/vhost.c | 99...

...into one and note how many of each there were. - * - * This function returns the descriptor number found, or vq->num (which is - * never a valid descriptor number) if none was found. A negative code is - * returned on error. */ -int vhost_get_vq_desc(struct vhost_virtqueue *vq, - struct vhost_used_elem *used, - struct iovec iov[], unsigned int iov_size, - unsigned int *out_num, unsigned int *in_num, - struct vhost_log *log, unsigned int *log_num) +static int get_indirect_packed(struct vhost_virtqueue *vq, + struct iovec iov[], unsigned int iov_size, + unsign...

...hing or other optimizations. > > > > Please review. > > > > Jason Wang (8): > > vhost: move get_rx_bufs to vhost.c > > vhost: hide used ring layout from device > > vhost: do not use vring_used_elem > > vhost_net: do not explicitly manipulate vhost_used_elem > > vhost: vhost_put_user() can accept metadata type > > virtio: introduce packed ring defines > > vhost: packed ring support > > vhost: event suppression for packed ring > > > > drivers/vhost/net.c | 136 ++---- > > drivers/vhost/s...

...hing or other optimizations. > > > > Please review. > > > > Jason Wang (8): > > vhost: move get_rx_bufs to vhost.c > > vhost: hide used ring layout from device > > vhost: do not use vring_used_elem > > vhost_net: do not explicitly manipulate vhost_used_elem > > vhost: vhost_put_user() can accept metadata type > > virtio: introduce packed ring defines > > vhost: packed ring support > > vhost: event suppression for packed ring > > > > drivers/vhost/net.c | 136 ++---- > > drivers/vhost/s...

...SCSI/VSOCK support (compile test only). >> - Fix several bugs >> >> Jason Wang (8): >> vhost: move get_rx_bufs to vhost.c >> vhost: hide used ring layout from device >> vhost: do not use vring_used_elem >> vhost_net: do not explicitly manipulate vhost_used_elem >> vhost: vhost_put_user() can accept metadata type >> virtio: introduce packed ring defines >> vhost: packed ring support >> vhost: event suppression for packed ring >> >> drivers/vhost/net.c | 136 ++---- >> drivers/vhost/scs...

...SCSI/VSOCK support (compile test only). >> - Fix several bugs >> >> Jason Wang (8): >> vhost: move get_rx_bufs to vhost.c >> vhost: hide used ring layout from device >> vhost: do not use vring_used_elem >> vhost_net: do not explicitly manipulate vhost_used_elem >> vhost: vhost_put_user() can accept metadata type >> vhost: packed ring support >> vhost: event suppression for packed ring >> vhost: enable packed virtqueues >> >> drivers/vhost/net.c | 143 ++----- >> drivers/vhost/scsi.c |...

...SCSI/VSOCK support (compile test only). >> - Fix several bugs >> >> Jason Wang (8): >> vhost: move get_rx_bufs to vhost.c >> vhost: hide used ring layout from device >> vhost: do not use vring_used_elem >> vhost_net: do not explicitly manipulate vhost_used_elem >> vhost: vhost_put_user() can accept metadata type >> vhost: packed ring support >> vhost: event suppression for packed ring >> vhost: enable packed virtqueues >> >> drivers/vhost/net.c | 143 ++----- >> drivers/vhost/scsi.c |...