Hello everyone,
This RFC implements packed ring support in virtio driver.
Some simple functional tests have been done with Jason's
packed ring implementation in vhost:
https://lkml.org/lkml/2018/4/23/12
Both of ping and netperf worked as expected (with EVENT_IDX
disabled).
TODO:
- Refinements
Signed-off-by: Tiwei Bie
---
include/uapi/linux/virtio_config.h | 12 +-
include/uapi/linux/virtio_ring.h | 36 ++
2 files changed, 47 insertions(+), 1 deletion(-)
diff --git a/include/uapi/linux/virtio_config.h
b/include/uapi/linux/virtio_config.h
index 30
This commit introduces the support for creating packed ring.
All split ring specific functions are added _split suffix.
Some necessary stubs for packed ring are also added.
Signed-off-by: Tiwei Bie
---
drivers/virtio/virtio_ring.c | 764 +++
include/linux/virtio_r
This commit introduces the basic support (without EVENT_IDX)
for packed ring.
Signed-off-by: Tiwei Bie
---
drivers/virtio/virtio_ring.c | 491 ++-
1 file changed, 481 insertions(+), 10 deletions(-)
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio
This commit introduces the event idx support in
packed ring.
Signed-off-by: Tiwei Bie
---
drivers/virtio/virtio_ring.c | 75 +---
1 file changed, 70 insertions(+), 5 deletions(-)
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index c6c5d
Signed-off-by: Tiwei Bie
---
drivers/virtio/virtio_ring.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index de3839f3621a..b158692263b0 100644
--- a/drivers/virtio/virtio_ring.c
+++ b/drivers/virtio/virtio_ring.c
@@ -1940,6 +194
On 5/16/2018 11:37 AM, Tiwei Bie wrote:
Signed-off-by: Tiwei Bie
---
drivers/virtio/virtio_ring.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
index de3839f3621a..b158692263b0 100644
--- a/drivers/virtio/virtio_ring.c
+++ b
On Wed, May 16, 2018 at 01:15:48PM +0300, Sergei Shtylyov wrote:
> On 5/16/2018 11:37 AM, Tiwei Bie wrote:
>
> > Signed-off-by: Tiwei Bie
> > ---
> > drivers/virtio/virtio_ring.c | 2 ++
> > 1 file changed, 2 insertions(+)
> >
> > diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/vir
On 05/16/2018 01:21 PM, Tiwei Bie wrote:
>>> Signed-off-by: Tiwei Bie
>>> ---
>>> drivers/virtio/virtio_ring.c | 2 ++
>>> 1 file changed, 2 insertions(+)
>>>
>>> diff --git a/drivers/virtio/virtio_ring.c b/drivers/virtio/virtio_ring.c
>>> index de3839f3621a..b158692263b0 100644
>>> --- a/driv
On 2018年05月16日 16:37, Tiwei Bie wrote:
This commit introduces the basic support (without EVENT_IDX)
for packed ring.
Signed-off-by: Tiwei Bie
---
drivers/virtio/virtio_ring.c | 491 ++-
1 file changed, 481 insertions(+), 10 deletions(-)
diff --git a/drivers
On 2018年05月16日 16:37, Tiwei Bie wrote:
This commit introduces the event idx support in
packed ring.
Signed-off-by: Tiwei Bie
---
drivers/virtio/virtio_ring.c | 75 +---
1 file changed, 70 insertions(+), 5 deletions(-)
diff --git a/drivers/virtio/virtio_ring
On Wed, May 16, 2018 at 02:42:53PM +0300, Sergei Shtylyov wrote:
> On 05/16/2018 01:21 PM, Tiwei Bie wrote:
>
> >>> Signed-off-by: Tiwei Bie
> >>> ---
> >>> drivers/virtio/virtio_ring.c | 2 ++
> >>> 1 file changed, 2 insertions(+)
> >>>
> >>> diff --git a/drivers/virtio/virtio_ring.c b/driver
Hi all:
This RFC implement packed ring layout. The code were tested with
Tiwei's RFC V3 ahttps://lkml.org/lkml/2018/4/25/34. Some fixups and
tweaks were needed on top of Tiwei's code to make it run for event
index.
Pktgen reports about 20% improvement on PPS (event index is off). More
testing is
Move get_rx_bufs() to vhost.c and rename it to
vhost_get_bufs(). This helps to hide vring internal layout from
specific device implementation. Packed ring implementation will
benefit from this.
Signed-off-by: Jason Wang
---
drivers/vhost/net.c | 83 ++---
We used to return descriptor head by vhost_get_vq_desc() to device and
pass it back to vhost_add_used() and its friends. This exposes the
internal used ring layout to device which makes it hard to be extended for
e.g packed ring layout.
So this patch tries to hide the used ring layout by
- lettin
Instead of depending on the exported vring_used_elem, this patch
switches to use a new internal structure vhost_used_elem which embed
vring_used_elem in itself. This could be used to let vhost to record
extra metadata for the incoming packed ring layout.
Signed-off-by: Jason Wang
---
drivers/vho
Two helpers of setting/getting used len were introduced to avoid
explicitly manipulating vhost_used_elem in zerocopy code. This will be
used to hide used_elem internals and simplify packed ring
implementation.
Signed-off-by: Jason Wang
---
drivers/vhost/net.c | 11 +--
drivers/vhost/vh
We assumes used ring update is the only user for vhost_put_user() in
the past. This may not be the case for the incoming packed ring which
may update the descriptor ring for used. So introduce a new type
parameter.
Signed-off-by: Jason Wang
---
drivers/vhost/vhost.c | 14 +++---
1 file c
Signed-off-by: Jason Wang
---
include/uapi/linux/virtio_config.h | 9 +
include/uapi/linux/virtio_ring.h | 13 +
2 files changed, 22 insertions(+)
diff --git a/include/uapi/linux/virtio_config.h
b/include/uapi/linux/virtio_config.h
index 308e209..5903d51 100644
--- a/incl
Signed-off-by: Jason Wang
---
drivers/vhost/net.c | 3 +-
drivers/vhost/vhost.c | 539 ++
drivers/vhost/vhost.h | 8 +-
3 files changed, 513 insertions(+), 37 deletions(-)
diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index 30273ad..
This patch introduces basic support for event suppression aka driver
and device area.
Signed-off-by: Jason Wang
---
drivers/vhost/vhost.c| 168 ---
drivers/vhost/vhost.h| 10 ++-
include/uapi/linux/virtio_ring.h | 19 +
3 files ch
On Wed, May 16, 2018 at 07:50:16PM +0800, Jason Wang wrote:
> On 2018年05月16日 16:37, Tiwei Bie wrote:
[...]
> > struct vring_virtqueue {
> > @@ -116,6 +117,9 @@ struct vring_virtqueue {
> > /* Last written value to driver->flags in
> > * guest byte order. *
Hi Matthew,
I love your patch! Perhaps something to improve:
[auto build test WARNING on linus/master]
[also build test WARNING on v4.17-rc5 next-20180516]
[cannot apply to target/master]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system]
url
Fixes: 5aff7a710f13 ("Convert target drivers to use sbitmap")
Signed-off-by: Fengguang Wu
---
iscsi_target_util.c |2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/target/iscsi/iscsi_target_util.c
b/drivers/target/iscsi/iscsi_target_util.c
index 28bcffa..e147aef 100
On 2018年05月16日 20:39, Tiwei Bie wrote:
On Wed, May 16, 2018 at 07:50:16PM +0800, Jason Wang wrote:
On 2018年05月16日 16:37, Tiwei Bie wrote:
[...]
struct vring_virtqueue {
@@ -116,6 +117,9 @@ struct vring_virtqueue {
/* Last written value to driver->flags in
On Wed, May 16, 2018 at 08:17:21PM +0800, Jason Wang wrote:
> On 2018年05月16日 16:37, Tiwei Bie wrote:
[...]
> > @@ -1160,15 +1186,27 @@ static void virtqueue_disable_cb_packed(struct
> > virtqueue *_vq)
> > static unsigned virtqueue_enable_cb_prepare_packed(struct virtqueue *_vq)
> > {
> >
On 2018年05月16日 20:58, Tiwei Bie wrote:
On Wed, May 16, 2018 at 08:17:21PM +0800, Jason Wang wrote:
On 2018年05月16日 16:37, Tiwei Bie wrote:
[...]
@@ -1160,15 +1186,27 @@ static void virtqueue_disable_cb_packed(struct
virtqueue *_vq)
static unsigned virtqueue_enable_cb_prepare_packed(struct
On Wed, May 16, 2018 at 08:51:43PM +0800, Jason Wang wrote:
> On 2018年05月16日 20:39, Tiwei Bie wrote:
> > On Wed, May 16, 2018 at 07:50:16PM +0800, Jason Wang wrote:
> > > On 2018年05月16日 16:37, Tiwei Bie wrote:
> > [...]
> > > >struct vring_virtqueue {
> > > > @@ -116,6 +117,9 @@ struct vring_vi
On 2018年05月16日 21:45, Tiwei Bie wrote:
On Wed, May 16, 2018 at 08:51:43PM +0800, Jason Wang wrote:
On 2018年05月16日 20:39, Tiwei Bie wrote:
On Wed, May 16, 2018 at 07:50:16PM +0800, Jason Wang wrote:
On 2018年05月16日 16:37, Tiwei Bie wrote:
[...]
struct vring_virtqueue {
@@ -116,6 +117,9 @
On Wed, May 16, 2018 at 10:05:44PM +0800, Jason Wang wrote:
> On 2018年05月16日 21:45, Tiwei Bie wrote:
> > On Wed, May 16, 2018 at 08:51:43PM +0800, Jason Wang wrote:
> > > On 2018年05月16日 20:39, Tiwei Bie wrote:
> > > > On Wed, May 16, 2018 at 07:50:16PM +0800, Jason Wang wrote:
> > > > > On 2018年05月
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