Displaying 20 results from an estimated 177 matches for "zcopy".
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2017 Sep 28
1
[PATCH net-next RFC 5/5] vhost_net: basic tx virtqueue batched processing
> @@ -461,6 +460,7 @@ static void handle_tx(struct vhost_net *net)
> struct socket *sock;
> struct vhost_net_ubuf_ref *uninitialized_var(ubufs);
> bool zcopy, zcopy_used;
> + int i, batched = VHOST_NET_BATCH;
>
> mutex_lock(&vq->mutex);
> sock = vq->private_data;
> @@ -475,6 +475,12 @@ static void handle_tx(struct vhost_net *net)
> hdr_size = nvq->vhost_hlen;
> zcopy = nvq->ubufs...
2017 Sep 28
1
[PATCH net-next RFC 5/5] vhost_net: basic tx virtqueue batched processing
> @@ -461,6 +460,7 @@ static void handle_tx(struct vhost_net *net)
> struct socket *sock;
> struct vhost_net_ubuf_ref *uninitialized_var(ubufs);
> bool zcopy, zcopy_used;
> + int i, batched = VHOST_NET_BATCH;
>
> mutex_lock(&vq->mutex);
> sock = vq->private_data;
> @@ -475,6 +475,12 @@ static void handle_tx(struct vhost_net *net)
> hdr_size = nvq->vhost_hlen;
> zcopy = nvq->ubufs...
2013 Jun 06
0
[PATCH net 2/2] vhost: fix ubuf_info cleanup
...git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 6b00f64..7fc47f7 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -155,14 +155,11 @@ static void vhost_net_ubuf_put_and_wait(struct vhost_net_ubuf_ref *ubufs)
static void vhost_net_clear_ubuf_info(struct vhost_net *n)
{
-
- bool zcopy;
int i;
- for (i = 0; i < n->dev.nvqs; ++i) {
- zcopy = vhost_net_zcopy_mask & (0x1 << i);
- if (zcopy)
- kfree(n->vqs[i].ubuf_info);
+ for (i = 0; i < VHOST_NET_VQ_MAX; ++i) {
+ kfree(n->vqs[i].ubuf_info);
+ n->vqs[i].ubuf_info = NULL;
}
}
@@ -171,7 +168,...
2013 Apr 27
0
[PATCH] vhost: Move vhost-net zerocopy support fields to net.c
...rs info */
+ struct ubuf_info *ubuf_info;
+ /* Reference counting for outstanding ubufs.
+ * Protected by vq mutex. Writers must also take device mutex. */
+ struct vhost_ubuf_ref *ubufs;
};
struct vhost_net {
@@ -92,6 +108,88 @@ struct vhost_net {
bool tx_flush;
};
+static unsigned vhost_zcopy_mask __read_mostly;
+
+void vhost_enable_zcopy(int vq)
+{
+ vhost_zcopy_mask |= 0x1 << vq;
+}
+
+static void vhost_zerocopy_done_signal(struct kref *kref)
+{
+ struct vhost_ubuf_ref *ubufs = container_of(kref, struct vhost_ubuf_ref,
+ kref);
+ wake_up(&ubufs->wait);
+}
+
+stru...
2013 Apr 27
0
[PATCH] vhost: Move vhost-net zerocopy support fields to net.c
...rs info */
+ struct ubuf_info *ubuf_info;
+ /* Reference counting for outstanding ubufs.
+ * Protected by vq mutex. Writers must also take device mutex. */
+ struct vhost_ubuf_ref *ubufs;
};
struct vhost_net {
@@ -92,6 +108,88 @@ struct vhost_net {
bool tx_flush;
};
+static unsigned vhost_zcopy_mask __read_mostly;
+
+void vhost_enable_zcopy(int vq)
+{
+ vhost_zcopy_mask |= 0x1 << vq;
+}
+
+static void vhost_zerocopy_done_signal(struct kref *kref)
+{
+ struct vhost_ubuf_ref *ubufs = container_of(kref, struct vhost_ubuf_ref,
+ kref);
+ wake_up(&ubufs->wait);
+}
+
+stru...
2013 Sep 23
2
[PATCH V3 4/6] vhost_net: determine whether or not to use zerocopy at one time
...10:54:44AM +0800, Jason Wang wrote:
> On 09/04/2013 07:59 PM, Michael S. Tsirkin wrote:
> > On Mon, Sep 02, 2013 at 04:40:59PM +0800, Jason Wang wrote:
> >> Currently, even if the packet length is smaller than VHOST_GOODCOPY_LEN, if
> >> upend_idx != done_idx we still set zcopy_used to true and rollback this choice
> >> later. This could be avoided by determining zerocopy once by checking all
> >> conditions at one time before.
> >>
> >> Signed-off-by: Jason Wang <jasowang at redhat.com>
> >> ---
> >> drivers/vh...
2013 Sep 23
2
[PATCH V3 4/6] vhost_net: determine whether or not to use zerocopy at one time
...10:54:44AM +0800, Jason Wang wrote:
> On 09/04/2013 07:59 PM, Michael S. Tsirkin wrote:
> > On Mon, Sep 02, 2013 at 04:40:59PM +0800, Jason Wang wrote:
> >> Currently, even if the packet length is smaller than VHOST_GOODCOPY_LEN, if
> >> upend_idx != done_idx we still set zcopy_used to true and rollback this choice
> >> later. This could be avoided by determining zerocopy once by checking all
> >> conditions at one time before.
> >>
> >> Signed-off-by: Jason Wang <jasowang at redhat.com>
> >> ---
> >> drivers/vh...
2013 Sep 04
2
[PATCH V3 4/6] vhost_net: determine whether or not to use zerocopy at one time
On Mon, Sep 02, 2013 at 04:40:59PM +0800, Jason Wang wrote:
> Currently, even if the packet length is smaller than VHOST_GOODCOPY_LEN, if
> upend_idx != done_idx we still set zcopy_used to true and rollback this choice
> later. This could be avoided by determining zerocopy once by checking all
> conditions at one time before.
>
> Signed-off-by: Jason Wang <jasowang at redhat.com>
> ---
> drivers/vhost/net.c | 47 ++++++++++++++++++++----------------...
2013 Sep 04
2
[PATCH V3 4/6] vhost_net: determine whether or not to use zerocopy at one time
On Mon, Sep 02, 2013 at 04:40:59PM +0800, Jason Wang wrote:
> Currently, even if the packet length is smaller than VHOST_GOODCOPY_LEN, if
> upend_idx != done_idx we still set zcopy_used to true and rollback this choice
> later. This could be avoided by determining zerocopy once by checking all
> conditions at one time before.
>
> Signed-off-by: Jason Wang <jasowang at redhat.com>
> ---
> drivers/vhost/net.c | 47 ++++++++++++++++++++----------------...
2013 Jun 06
5
[PATCH net 0/2] vhost fixes for 3.10
Two patches fixing the fallout from the vhost cleanup in 3.10.
Thanks to Tommi Rantala who reported the issue.
Tommi, could you please confirm this fixes the crashes for you?
Michael S. Tsirkin (2):
vhost: check owner before we overwrite ubuf_info
vhost: fix ubuf_info cleanup
drivers/vhost/net.c | 26 +++++++++++---------------
drivers/vhost/vhost.c | 8 +++++++-
drivers/vhost/vhost.h |
2013 Jun 06
5
[PATCH net 0/2] vhost fixes for 3.10
Two patches fixing the fallout from the vhost cleanup in 3.10.
Thanks to Tommi Rantala who reported the issue.
Tommi, could you please confirm this fixes the crashes for you?
Michael S. Tsirkin (2):
vhost: check owner before we overwrite ubuf_info
vhost: fix ubuf_info cleanup
drivers/vhost/net.c | 26 +++++++++++---------------
drivers/vhost/vhost.c | 8 +++++++-
drivers/vhost/vhost.h |
2011 Jul 18
1
[PATCHv11] vhost: vhost TX zero-copy support
>From: Shirley Ma <mashirle at us.ibm.com>
This adds experimental zero copy support in vhost-net,
disabled by default. To enable, set
experimental_zcopytx module option to 1.
This patch maintains the outstanding userspace buffers in the
sequence it is delivered to vhost. The outstanding userspace buffers
will be marked as done once the lower device buffers DMA has finished.
This is monitored through last reference of kfree_skb callback. Two
buffer...
2011 Jul 18
1
[PATCHv11] vhost: vhost TX zero-copy support
>From: Shirley Ma <mashirle at us.ibm.com>
This adds experimental zero copy support in vhost-net,
disabled by default. To enable, set
experimental_zcopytx module option to 1.
This patch maintains the outstanding userspace buffers in the
sequence it is delivered to vhost. The outstanding userspace buffers
will be marked as done once the lower device buffers DMA has finished.
This is monitored through last reference of kfree_skb callback. Two
buffer...
2011 Jul 17
3
[PATCHv9] vhost: experimental tx zero-copy support
...linux/virtio_net.h>
#include <linux/miscdevice.h>
#include <linux/module.h>
+#include <linux/moduleparam.h>
#include <linux/mutex.h>
#include <linux/workqueue.h>
#include <linux/rcupdate.h>
@@ -28,10 +29,18 @@
#include "vhost.h"
+static int zcopytx;
+module_param(zcopytx, int, 0444);
+MODULE_PARM_DESC(lnksts, "Enable Zero Copy Transmit");
+
/* Max number of bytes transferred before requeueing the job.
* Using this limit prevents one virtqueue from starving others. */
#define VHOST_NET_WEIGHT 0x80000
+/* MAX number of TX used...
2011 Jul 17
3
[PATCHv9] vhost: experimental tx zero-copy support
...linux/virtio_net.h>
#include <linux/miscdevice.h>
#include <linux/module.h>
+#include <linux/moduleparam.h>
#include <linux/mutex.h>
#include <linux/workqueue.h>
#include <linux/rcupdate.h>
@@ -28,10 +29,18 @@
#include "vhost.h"
+static int zcopytx;
+module_param(zcopytx, int, 0444);
+MODULE_PARM_DESC(lnksts, "Enable Zero Copy Transmit");
+
/* Max number of bytes transferred before requeueing the job.
* Using this limit prevents one virtqueue from starving others. */
#define VHOST_NET_WEIGHT 0x80000
+/* MAX number of TX used...
2023 Aug 01
0
[PATCH net-next v5 4/4] vsock/virtio: MSG_ZEROCOPY flag support
On Sun, 2023-07-30 at 11:59 +0300, Arseniy Krasnov wrote:
> +static int virtio_transport_fill_skb(struct sk_buff *skb,
> + struct virtio_vsock_pkt_info *info,
> + size_t len,
> + bool zcopy)
> +{
> + if (zcopy) {
> + return __zerocopy_sg_from_iter(info->msg, NULL, skb,
> + &info->msg->msg_iter,
> + len);
> + } else {
No need for an else statement after 'return'
> + void *payload;
> + int err;
> +
> + payload...
2023 Aug 01
0
[PATCH net-next v5 4/4] vsock/virtio: MSG_ZEROCOPY flag support
...023 16:34, Paolo Abeni wrote:
> > On Sun, 2023-07-30 at 11:59 +0300, Arseniy Krasnov wrote:
> > > +static int virtio_transport_fill_skb(struct sk_buff *skb,
> > > + struct virtio_vsock_pkt_info *info,
> > > + size_t len,
> > > + bool zcopy)
> > > +{
> > > + if (zcopy) {
> > > + return __zerocopy_sg_from_iter(info->msg, NULL, skb,
> > > + &info->msg->msg_iter,
> > > + len);
> > > + } else {
> >
> >
> > No need for an else statem...
2011 Jul 19
0
[PATCH RFC] vhost: fix zcopy reference counting
Fix get/put refcount imbalance with zero copy,
which caused qemu to hang forever on guest driver unload.
Signed-off-by: Michael S. Tsirkin <mst at redhat.com>
---
Dave, I've put this on my tree so no need for you to bother.
drivers/vhost/vhost.c | 1 -
1 files changed, 0 insertions(+), 1 deletions(-)
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index
2011 Jul 19
0
[PATCH RFC] vhost: fix zcopy reference counting
Fix get/put refcount imbalance with zero copy,
which caused qemu to hang forever on guest driver unload.
Signed-off-by: Michael S. Tsirkin <mst at redhat.com>
---
Dave, I've put this on my tree so no need for you to bother.
drivers/vhost/vhost.c | 1 -
1 files changed, 0 insertions(+), 1 deletions(-)
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index
2012 Dec 03
1
[PATCH] vhost-net: initialize zcopy packet counters
...c b/drivers/vhost/net.c
index 67898fa..ff6c9199 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -823,6 +823,9 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd)
r = vhost_init_used(vq);
if (r)
goto err_vq;
+
+ n->tx_packets = 0;
+ n->tx_zcopy_err = 0;
}
mutex_unlock(&vq->mutex);
--
MST