Displaying 20 results from an estimated 24 matches for "vhost_ubuf_alloc".
2011 Jul 17
3
[PATCHv9] vhost: experimental tx zero-copy support
...fs = NULL;
int r;
mutex_lock(&n->dev.mutex);
@@ -632,6 +691,13 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd)
oldsock = rcu_dereference_protected(vq->private_data,
lockdep_is_held(&vq->mutex));
if (sock != oldsock) {
+ ubufs = vhost_ubuf_alloc(vq, sock && vhost_sock_zcopy(sock));
+ if (IS_ERR(ubufs)) {
+ r = PTR_ERR(ubufs);
+ goto err_ubufs;
+ }
+ oldubufs = vq->ubufs;
+ vq->ubufs = ubufs;
vhost_net_disable_vq(n, vq);
rcu_assign_pointer(vq->private_data, sock);
vhost_net_enable_vq(n, vq);
@@ -639,6 +705,...
2011 Jul 17
3
[PATCHv9] vhost: experimental tx zero-copy support
...fs = NULL;
int r;
mutex_lock(&n->dev.mutex);
@@ -632,6 +691,13 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd)
oldsock = rcu_dereference_protected(vq->private_data,
lockdep_is_held(&vq->mutex));
if (sock != oldsock) {
+ ubufs = vhost_ubuf_alloc(vq, sock && vhost_sock_zcopy(sock));
+ if (IS_ERR(ubufs)) {
+ r = PTR_ERR(ubufs);
+ goto err_ubufs;
+ }
+ oldubufs = vq->ubufs;
+ vq->ubufs = ubufs;
vhost_net_disable_vq(n, vq);
rcu_assign_pointer(vq->private_data, sock);
vhost_net_enable_vq(n, vq);
@@ -639,6 +705,...
2011 Jul 18
1
[PATCHv10] vhost: vhost TX zero-copy support
...fs = NULL;
int r;
mutex_lock(&n->dev.mutex);
@@ -632,6 +691,13 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd)
oldsock = rcu_dereference_protected(vq->private_data,
lockdep_is_held(&vq->mutex));
if (sock != oldsock) {
+ ubufs = vhost_ubuf_alloc(vq, sock && vhost_sock_zcopy(sock));
+ if (IS_ERR(ubufs)) {
+ r = PTR_ERR(ubufs);
+ goto err_ubufs;
+ }
+ oldubufs = vq->ubufs;
+ vq->ubufs = ubufs;
vhost_net_disable_vq(n, vq);
rcu_assign_pointer(vq->private_data, sock);
vhost_net_enable_vq(n, vq);
@@ -639,6 +705,...
2011 Jul 18
1
[PATCHv10] vhost: vhost TX zero-copy support
...fs = NULL;
int r;
mutex_lock(&n->dev.mutex);
@@ -632,6 +691,13 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd)
oldsock = rcu_dereference_protected(vq->private_data,
lockdep_is_held(&vq->mutex));
if (sock != oldsock) {
+ ubufs = vhost_ubuf_alloc(vq, sock && vhost_sock_zcopy(sock));
+ if (IS_ERR(ubufs)) {
+ r = PTR_ERR(ubufs);
+ goto err_ubufs;
+ }
+ oldubufs = vq->ubufs;
+ vq->ubufs = ubufs;
vhost_net_disable_vq(n, vq);
rcu_assign_pointer(vq->private_data, sock);
vhost_net_enable_vq(n, vq);
@@ -639,6 +705,...
2013 Apr 27
0
[PATCH] vhost: Move vhost-net zerocopy support fields to net.c
...;
+
+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);
+}
+
+struct vhost_ubuf_ref *vhost_ubuf_alloc(struct vhost_virtqueue *vq,
+ bool zcopy)
+{
+ struct vhost_ubuf_ref *ubufs;
+ /* No zero copy backend? Nothing to count. */
+ if (!zcopy)
+ return NULL;
+ ubufs = kmalloc(sizeof(*ubufs), GFP_KERNEL);
+ if (!ubufs)
+ return ERR_PTR(-ENOMEM);
+ kref_init(&ubufs->kref);
+ init_waitqueue_...
2013 Apr 27
0
[PATCH] vhost: Move vhost-net zerocopy support fields to net.c
...;
+
+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);
+}
+
+struct vhost_ubuf_ref *vhost_ubuf_alloc(struct vhost_virtqueue *vq,
+ bool zcopy)
+{
+ struct vhost_ubuf_ref *ubufs;
+ /* No zero copy backend? Nothing to count. */
+ if (!zcopy)
+ return NULL;
+ ubufs = kmalloc(sizeof(*ubufs), GFP_KERNEL);
+ if (!ubufs)
+ return ERR_PTR(-ENOMEM);
+ kref_init(&ubufs->kref);
+ init_waitqueue_...
2011 Jul 18
1
[PATCHv11] vhost: vhost TX zero-copy support
...fs = NULL;
int r;
mutex_lock(&n->dev.mutex);
@@ -632,6 +693,13 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd)
oldsock = rcu_dereference_protected(vq->private_data,
lockdep_is_held(&vq->mutex));
if (sock != oldsock) {
+ ubufs = vhost_ubuf_alloc(vq, sock && vhost_sock_zcopy(sock));
+ if (IS_ERR(ubufs)) {
+ r = PTR_ERR(ubufs);
+ goto err_ubufs;
+ }
+ oldubufs = vq->ubufs;
+ vq->ubufs = ubufs;
vhost_net_disable_vq(n, vq);
rcu_assign_pointer(vq->private_data, sock);
vhost_net_enable_vq(n, vq);
@@ -639,6 +707,...
2011 Jul 18
1
[PATCHv11] vhost: vhost TX zero-copy support
...fs = NULL;
int r;
mutex_lock(&n->dev.mutex);
@@ -632,6 +693,13 @@ static long vhost_net_set_backend(struct vhost_net *n, unsigned index, int fd)
oldsock = rcu_dereference_protected(vq->private_data,
lockdep_is_held(&vq->mutex));
if (sock != oldsock) {
+ ubufs = vhost_ubuf_alloc(vq, sock && vhost_sock_zcopy(sock));
+ if (IS_ERR(ubufs)) {
+ r = PTR_ERR(ubufs);
+ goto err_ubufs;
+ }
+ oldubufs = vq->ubufs;
+ vq->ubufs = ubufs;
vhost_net_disable_vq(n, vq);
rcu_assign_pointer(vq->private_data, sock);
vhost_net_enable_vq(n, vq);
@@ -639,6 +707,...
2011 Jul 19
0
[PATCH RFC] vhost: fix zcopy reference counting
...o 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 46822c0..c16d225 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -1578,7 +1578,6 @@ struct vhost_ubuf_ref *vhost_ubuf_alloc(struct vhost_virtqueue *vq,
if (!ubufs)
return ERR_PTR(-ENOMEM);
kref_init(&ubufs->kref);
- kref_get(&ubufs->kref);
init_waitqueue_head(&ubufs->wait);
ubufs->vq = vq;
return ubufs;
--
1.7.5.53.gc233e
2011 Jul 19
0
[PATCH RFC] vhost: fix zcopy reference counting
...o 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 46822c0..c16d225 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -1578,7 +1578,6 @@ struct vhost_ubuf_ref *vhost_ubuf_alloc(struct vhost_virtqueue *vq,
if (!ubufs)
return ERR_PTR(-ENOMEM);
kref_init(&ubufs->kref);
- kref_get(&ubufs->kref);
init_waitqueue_head(&ubufs->wait);
ubufs->vq = vq;
return ubufs;
--
1.7.5.53.gc233e
2013 Jun 20
0
[PATCH net for-stable] vhost-net: fix use-after-free in vhost_net_flush
...ee(struct vhost_ubuf_ref *ubufs)
+{
+ vhost_ubuf_put_and_wait(ubufs);
kfree(ubufs);
}
diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
index 17261e2..b53cb28 100644
--- a/drivers/vhost/vhost.h
+++ b/drivers/vhost/vhost.h
@@ -63,6 +63,7 @@ struct vhost_ubuf_ref {
struct vhost_ubuf_ref *vhost_ubuf_alloc(struct vhost_virtqueue *, bool zcopy);
void vhost_ubuf_put(struct vhost_ubuf_ref *);
void vhost_ubuf_put_and_wait(struct vhost_ubuf_ref *);
+void vhost_ubuf_put_wait_and_free(struct vhost_ubuf_ref *);
struct ubuf_info;
--
MST
2013 Jun 20
0
[PATCH net for-stable] vhost-net: fix use-after-free in vhost_net_flush
...ee(struct vhost_ubuf_ref *ubufs)
+{
+ vhost_ubuf_put_and_wait(ubufs);
kfree(ubufs);
}
diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
index 17261e2..b53cb28 100644
--- a/drivers/vhost/vhost.h
+++ b/drivers/vhost/vhost.h
@@ -63,6 +63,7 @@ struct vhost_ubuf_ref {
struct vhost_ubuf_ref *vhost_ubuf_alloc(struct vhost_virtqueue *, bool zcopy);
void vhost_ubuf_put(struct vhost_ubuf_ref *);
void vhost_ubuf_put_and_wait(struct vhost_ubuf_ref *);
+void vhost_ubuf_put_wait_and_free(struct vhost_ubuf_ref *);
struct ubuf_info;
--
MST
2012 Jul 12
2
[PATCH 3/5] vhost: Make vhost a separate module
...-1565,6 +1590,7 @@ void vhost_disable_notify(struct vhost_dev *dev, struct vhost_virtqueue *vq)
&vq->used->flags, r);
}
}
+EXPORT_SYMBOL_GPL(vhost_disable_notify);
static void vhost_zerocopy_done_signal(struct kref *kref)
{
@@ -1588,11 +1614,13 @@ struct vhost_ubuf_ref *vhost_ubuf_alloc(struct vhost_virtqueue *vq,
ubufs->vq = vq;
return ubufs;
}
+EXPORT_SYMBOL_GPL(vhost_ubuf_alloc);
void vhost_ubuf_put(struct vhost_ubuf_ref *ubufs)
{
kref_put(&ubufs->kref, vhost_zerocopy_done_signal);
}
+EXPORT_SYMBOL_GPL(vhost_ubuf_put);
void vhost_ubuf_put_and_wait(struc...
2012 Jul 12
2
[PATCH 3/5] vhost: Make vhost a separate module
...-1565,6 +1590,7 @@ void vhost_disable_notify(struct vhost_dev *dev, struct vhost_virtqueue *vq)
&vq->used->flags, r);
}
}
+EXPORT_SYMBOL_GPL(vhost_disable_notify);
static void vhost_zerocopy_done_signal(struct kref *kref)
{
@@ -1588,11 +1614,13 @@ struct vhost_ubuf_ref *vhost_ubuf_alloc(struct vhost_virtqueue *vq,
ubufs->vq = vq;
return ubufs;
}
+EXPORT_SYMBOL_GPL(vhost_ubuf_alloc);
void vhost_ubuf_put(struct vhost_ubuf_ref *ubufs)
{
kref_put(&ubufs->kref, vhost_zerocopy_done_signal);
}
+EXPORT_SYMBOL_GPL(vhost_ubuf_put);
void vhost_ubuf_put_and_wait(struc...
2013 May 06
13
[PATCH v2 00/11] vhost cleanups
MST, This is on top of [PATCH 0/2] vhost-net fix ubuf.
Asias He (11):
vhost: Remove vhost_enable_zcopy in vhost.h
vhost: Move VHOST_NET_FEATURES to net.c
vhost: Make vhost a separate module
vhost: Remove comments for hdr in vhost.h
vhost: Simplify dev->vqs[i] access
vhost-net: Cleanup vhost_ubuf and vhost_zcopy
vhost-scsi: Remove unnecessary forward struct vhost_scsi declaration
2013 May 06
13
[PATCH v2 00/11] vhost cleanups
MST, This is on top of [PATCH 0/2] vhost-net fix ubuf.
Asias He (11):
vhost: Remove vhost_enable_zcopy in vhost.h
vhost: Move VHOST_NET_FEATURES to net.c
vhost: Make vhost a separate module
vhost: Remove comments for hdr in vhost.h
vhost: Simplify dev->vqs[i] access
vhost-net: Cleanup vhost_ubuf and vhost_zcopy
vhost-scsi: Remove unnecessary forward struct vhost_scsi declaration
2012 Jul 13
9
[PATCH RESEND 0/5] Add vhost-blk support
Hi folks,
[I am resending to fix the broken thread in the previous one.]
This patchset adds vhost-blk support. vhost-blk is a in kernel virito-blk
device accelerator. Compared to userspace virtio-blk implementation, vhost-blk
gives about 5% to 15% performance improvement.
Asias He (5):
aio: Export symbols and struct kiocb_batch for in kernel aio usage
eventfd: Export symbol
2012 Jul 13
9
[PATCH RESEND 0/5] Add vhost-blk support
Hi folks,
[I am resending to fix the broken thread in the previous one.]
This patchset adds vhost-blk support. vhost-blk is a in kernel virito-blk
device accelerator. Compared to userspace virtio-blk implementation, vhost-blk
gives about 5% to 15% performance improvement.
Asias He (5):
aio: Export symbols and struct kiocb_batch for in kernel aio usage
eventfd: Export symbol
2012 Oct 31
8
[PATCHv2 net-next 0/8] enable/disable zero copy tx dynamically
tun supports zero copy transmit since 0690899b4d4501b3505be069b9a687e68ccbe15b,
however you can only enable this mode if you know your workload does not
trigger heavy guest to host/host to guest traffic - otherwise you
get a (minor) performance regression.
This patchset addresses this problem by notifying the owner
device when callback is invoked because of a data copy.
This makes it possible to
2012 Oct 31
8
[PATCHv2 net-next 0/8] enable/disable zero copy tx dynamically
tun supports zero copy transmit since 0690899b4d4501b3505be069b9a687e68ccbe15b,
however you can only enable this mode if you know your workload does not
trigger heavy guest to host/host to guest traffic - otherwise you
get a (minor) performance regression.
This patchset addresses this problem by notifying the owner
device when callback is invoked because of a data copy.
This makes it possible to