Re: Re: Re: Re: [PATCH v2 0/2] virtio: abstract virtqueue related methods

2023-05-17 Thread Michael S. Tsirkin
On Wed, May 17, 2023 at 02:21:09PM +0800, zhenwei pi wrote:
> On 5/17/23 14:10, Michael S. Tsirkin wrote:
> > On Wed, May 17, 2023 at 12:58:10PM +0800, zhenwei pi wrote:
> > > On 5/17/23 11:57, Michael S. Tsirkin wrote:
> > > > On Wed, May 17, 2023 at 11:51:03AM +0800, zhenwei pi wrote:
> > > > > 
> > > > > 
> > > > > On 5/17/23 11:46, Michael S. Tsirkin wrote:
> > > > > > On Wed, May 17, 2023 at 10:54:22AM +0800, zhenwei pi wrote:
> > > > > > > v1 -> v2:
> > > > > > > - Suggested by MST, use fast path for vring based performance
> > > > > > > sensitive API.
> > > > > > > - Reduce changes in tools/virtio.
> > > > > > > 
> > > > > > > Add test result(no obvious change):
> > > > > > > Before:
> > > > > > > time ./vringh_test --parallel
> > > > > > > Using CPUS 0 and 191
> > > > > > > Guest: notified 10036893, pinged 68278
> > > > > > > Host: notified 68278, pinged 3093532
> > > > > > > 
> > > > > > > real  0m14.463s
> > > > > > > user  0m6.437s
> > > > > > > sys   0m8.010s
> > > > > > > 
> > > > > > > After:
> > > > > > > time ./vringh_test --parallel
> > > > > > > Using CPUS 0 and 191
> > > > > > > Guest: notified 10036709, pinged 68347
> > > > > > > Host: notified 68347, pinged 3085292
> > > > > > > 
> > > > > > > real  0m14.196s
> > > > > > > user  0m6.289s
> > > > > > > sys   0m7.885s
> > > > > > > 
> > > > > > > v1:
> > > > > > > Hi,
> > > > > > > 
> > > > > > > 3 weeks ago, I posted a proposal 'Virtio Over Fabrics':
> > > > > > > https://lists.oasis-open.org/archives/virtio-comment/202304/msg00442.html
> > > > > > > 
> > > > > > > Jason and Stefan pointed out that a non-vring based virtqueue has 
> > > > > > > a
> > > > > > > chance to overwrite virtqueue instead of using vring virtqueue.
> > > > > > > 
> > > > > > > Then I try to abstract virtqueue related methods in this series, 
> > > > > > > the
> > > > > > > details changes see the comment of patch 'virtio: abstract 
> > > > > > > virtqueue related methods'.
> > > > > > > 
> > > > > > > Something is still remained:
> > > > > > > - __virtqueue_break/__virtqueue_unbreak is supposed to use by 
> > > > > > > internal
> > > > > > >  virtio core, I'd like to rename them to vring_virtqueue_break
> > > > > > >  /vring_virtqueue_unbreak. Is this reasonable?
> > > > > > 
> > > > > > Why? These just set a flag?
> > > > > > 
> > > > > 
> > > > > Rename '__virtqueue_break' to 'vring_virtqueue_break', to make symbols
> > > > > exported from virtio_ring.ko have unified prefix 
> > > > > 'vring_virtqueue_xxx'.
> > > > 
> > > > I just do not see why you need these callbacks at all.
> > > > 
> > > 
> > > I use these callbacks for break/unbreak device like:
> > > static inline void virtio_break_device(struct virtio_device *dev)
> > > {
> > >   struct virtqueue *vq;
> > > 
> > >   spin_lock(&dev->vqs_list_lock);
> > >   list_for_each_entry(vq, &dev->vqs, list) {
> > >   vq->__break(vq);
> > >   }
> > >   spin_unlock(&dev->vqs_list_lock);
> > > }
> > 
> > why do this? backend knows they are broken.
> > 
> 
> I grep 'virtio_break_device' in the latest code:
> arch/um/drivers/virtio_uml.c:1147:virtio_break_device(&vu_dev->vdev);
> arch/um/drivers/virtio_uml.c:1285:virtio_break_device(&vu_dev->vdev);
> drivers/crypto/virtio/virtio_crypto_core.c:269:   
> virtio_break_device(vcrypto->vdev);
> drivers/s390/virtio/virtio_ccw.c:1251:
> virtio_break_device(&vcdev->vdev);
> drivers/s390/virtio/virtio_ccw.c:1268:
> virtio_break_device(&vcdev->vdev);
> drivers/firmware/arm_scmi/virtio.c:489:
> virtio_break_device(vioch->vqueue->vdev);
> drivers/char/virtio_console.c:1956:   virtio_break_device(vdev);
> 
> Some virtio drivers use 'virtio_break_device'...

You should read the code and understand what it does,
not just grep things and make assumptions.
What virtio_break_device does is stop linux from sending
new requests.


> > > > > > > - 
> > > > > > > virtqueue_get_desc_addr/virtqueue_get_avail_addr/virtqueue_get_used_addr
> > > > > > >  /virtqueue_get_vring is vring specific, I'd like to rename 
> > > > > > > them like
> > > > > > >  vring_virtqueue_get_desc_addr. Is this reasonable?
> > > > > > > - there are still some functions in virtio_ring.c with prefix 
> > > > > > > *virtqueue*,
> > > > > > >  for example 'virtqueue_add_split', just keep it or rename it 
> > > > > > > to
> > > > > > >  'vring_virtqueue_add_split'?
> > > > > > > zhenwei pi (2):
> > > > > > >  virtio: abstract virtqueue related methods
> > > > > > >  tools/virtio: implement virtqueue in test
> > > > > > > 
> > > > > > > drivers/virtio/virtio_ring.c | 285 +-
> > > > > > > include/linux/virtio.h   | 441 
> > > > > > > +++
> > > > > > > include/linux/virtio_ring.h  |  26 +++
> > > > > > > tools/virtio/linux/virtio.h  | 355 
> > > > > > > +---
> > > > > > > 4 files changed, 807 insertions(+), 300 d

Re: Re: Re: Re: [PATCH v2 0/2] virtio: abstract virtqueue related methods

2023-05-16 Thread zhenwei pi via Virtualization

On 5/17/23 14:10, Michael S. Tsirkin wrote:

On Wed, May 17, 2023 at 12:58:10PM +0800, zhenwei pi wrote:

On 5/17/23 11:57, Michael S. Tsirkin wrote:

On Wed, May 17, 2023 at 11:51:03AM +0800, zhenwei pi wrote:



On 5/17/23 11:46, Michael S. Tsirkin wrote:

On Wed, May 17, 2023 at 10:54:22AM +0800, zhenwei pi wrote:

v1 -> v2:
- Suggested by MST, use fast path for vring based performance
sensitive API.
- Reduce changes in tools/virtio.

Add test result(no obvious change):
Before:
time ./vringh_test --parallel
Using CPUS 0 and 191
Guest: notified 10036893, pinged 68278
Host: notified 68278, pinged 3093532

real0m14.463s
user0m6.437s
sys 0m8.010s

After:
time ./vringh_test --parallel
Using CPUS 0 and 191
Guest: notified 10036709, pinged 68347
Host: notified 68347, pinged 3085292

real0m14.196s
user0m6.289s
sys 0m7.885s

v1:
Hi,

3 weeks ago, I posted a proposal 'Virtio Over Fabrics':
https://lists.oasis-open.org/archives/virtio-comment/202304/msg00442.html

Jason and Stefan pointed out that a non-vring based virtqueue has a
chance to overwrite virtqueue instead of using vring virtqueue.

Then I try to abstract virtqueue related methods in this series, the
details changes see the comment of patch 'virtio: abstract virtqueue related 
methods'.

Something is still remained:
- __virtqueue_break/__virtqueue_unbreak is supposed to use by internal
 virtio core, I'd like to rename them to vring_virtqueue_break
 /vring_virtqueue_unbreak. Is this reasonable?


Why? These just set a flag?



Rename '__virtqueue_break' to 'vring_virtqueue_break', to make symbols
exported from virtio_ring.ko have unified prefix 'vring_virtqueue_xxx'.


I just do not see why you need these callbacks at all.



I use these callbacks for break/unbreak device like:
static inline void virtio_break_device(struct virtio_device *dev)
{
struct virtqueue *vq;

spin_lock(&dev->vqs_list_lock);
list_for_each_entry(vq, &dev->vqs, list) {
vq->__break(vq);
}
spin_unlock(&dev->vqs_list_lock);
}


why do this? backend knows they are broken.



I grep 'virtio_break_device' in the latest code:
arch/um/drivers/virtio_uml.c:1147:  virtio_break_device(&vu_dev->vdev);
arch/um/drivers/virtio_uml.c:1285:  virtio_break_device(&vu_dev->vdev);
drivers/crypto/virtio/virtio_crypto_core.c:269:	 
virtio_break_device(vcrypto->vdev);

drivers/s390/virtio/virtio_ccw.c:1251:  
virtio_break_device(&vcdev->vdev);
drivers/s390/virtio/virtio_ccw.c:1268:  
virtio_break_device(&vcdev->vdev);
drivers/firmware/arm_scmi/virtio.c:489: 
virtio_break_device(vioch->vqueue->vdev);

drivers/char/virtio_console.c:1956: virtio_break_device(vdev);

Some virtio drivers use 'virtio_break_device'...


- virtqueue_get_desc_addr/virtqueue_get_avail_addr/virtqueue_get_used_addr
 /virtqueue_get_vring is vring specific, I'd like to rename them like
 vring_virtqueue_get_desc_addr. Is this reasonable?
- there are still some functions in virtio_ring.c with prefix *virtqueue*,
 for example 'virtqueue_add_split', just keep it or rename it to
 'vring_virtqueue_add_split'?
zhenwei pi (2):
 virtio: abstract virtqueue related methods
 tools/virtio: implement virtqueue in test

drivers/virtio/virtio_ring.c | 285 +-
include/linux/virtio.h   | 441 +++
include/linux/virtio_ring.h  |  26 +++
tools/virtio/linux/virtio.h  | 355 +---
4 files changed, 807 insertions(+), 300 deletions(-)

--
2.20.1




--
zhenwei pi




--
zhenwei pi




--
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Re: Re: Re: [PATCH v2 0/2] virtio: abstract virtqueue related methods

2023-05-16 Thread Michael S. Tsirkin
On Wed, May 17, 2023 at 12:58:10PM +0800, zhenwei pi wrote:
> On 5/17/23 11:57, Michael S. Tsirkin wrote:
> > On Wed, May 17, 2023 at 11:51:03AM +0800, zhenwei pi wrote:
> > > 
> > > 
> > > On 5/17/23 11:46, Michael S. Tsirkin wrote:
> > > > On Wed, May 17, 2023 at 10:54:22AM +0800, zhenwei pi wrote:
> > > > > v1 -> v2:
> > > > > - Suggested by MST, use fast path for vring based performance
> > > > > sensitive API.
> > > > > - Reduce changes in tools/virtio.
> > > > > 
> > > > > Add test result(no obvious change):
> > > > > Before:
> > > > > time ./vringh_test --parallel
> > > > > Using CPUS 0 and 191
> > > > > Guest: notified 10036893, pinged 68278
> > > > > Host: notified 68278, pinged 3093532
> > > > > 
> > > > > real  0m14.463s
> > > > > user  0m6.437s
> > > > > sys   0m8.010s
> > > > > 
> > > > > After:
> > > > > time ./vringh_test --parallel
> > > > > Using CPUS 0 and 191
> > > > > Guest: notified 10036709, pinged 68347
> > > > > Host: notified 68347, pinged 3085292
> > > > > 
> > > > > real  0m14.196s
> > > > > user  0m6.289s
> > > > > sys   0m7.885s
> > > > > 
> > > > > v1:
> > > > > Hi,
> > > > > 
> > > > > 3 weeks ago, I posted a proposal 'Virtio Over Fabrics':
> > > > > https://lists.oasis-open.org/archives/virtio-comment/202304/msg00442.html
> > > > > 
> > > > > Jason and Stefan pointed out that a non-vring based virtqueue has a
> > > > > chance to overwrite virtqueue instead of using vring virtqueue.
> > > > > 
> > > > > Then I try to abstract virtqueue related methods in this series, the
> > > > > details changes see the comment of patch 'virtio: abstract virtqueue 
> > > > > related methods'.
> > > > > 
> > > > > Something is still remained:
> > > > > - __virtqueue_break/__virtqueue_unbreak is supposed to use by internal
> > > > > virtio core, I'd like to rename them to vring_virtqueue_break
> > > > > /vring_virtqueue_unbreak. Is this reasonable?
> > > > 
> > > > Why? These just set a flag?
> > > > 
> > > 
> > > Rename '__virtqueue_break' to 'vring_virtqueue_break', to make symbols
> > > exported from virtio_ring.ko have unified prefix 'vring_virtqueue_xxx'.
> > 
> > I just do not see why you need these callbacks at all.
> > 
> 
> I use these callbacks for break/unbreak device like:
> static inline void virtio_break_device(struct virtio_device *dev)
> {
>   struct virtqueue *vq;
> 
>   spin_lock(&dev->vqs_list_lock);
>   list_for_each_entry(vq, &dev->vqs, list) {
>   vq->__break(vq);
>   }
>   spin_unlock(&dev->vqs_list_lock);
> }

why do this? backend knows they are broken.

> > > > > - 
> > > > > virtqueue_get_desc_addr/virtqueue_get_avail_addr/virtqueue_get_used_addr
> > > > > /virtqueue_get_vring is vring specific, I'd like to rename them 
> > > > > like
> > > > > vring_virtqueue_get_desc_addr. Is this reasonable?
> > > > > - there are still some functions in virtio_ring.c with prefix 
> > > > > *virtqueue*,
> > > > > for example 'virtqueue_add_split', just keep it or rename it to
> > > > > 'vring_virtqueue_add_split'?
> > > > > zhenwei pi (2):
> > > > > virtio: abstract virtqueue related methods
> > > > > tools/virtio: implement virtqueue in test
> > > > > 
> > > > >drivers/virtio/virtio_ring.c | 285 +-
> > > > >include/linux/virtio.h   | 441 
> > > > > +++
> > > > >include/linux/virtio_ring.h  |  26 +++
> > > > >tools/virtio/linux/virtio.h  | 355 +---
> > > > >4 files changed, 807 insertions(+), 300 deletions(-)
> > > > > 
> > > > > -- 
> > > > > 2.20.1
> > > > 
> > > 
> > > -- 
> > > zhenwei pi
> > 
> 
> -- 
> zhenwei pi

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Re: Re: Re: [PATCH v2 0/2] virtio: abstract virtqueue related methods

2023-05-16 Thread zhenwei pi via Virtualization

On 5/17/23 11:57, Michael S. Tsirkin wrote:

On Wed, May 17, 2023 at 11:51:03AM +0800, zhenwei pi wrote:



On 5/17/23 11:46, Michael S. Tsirkin wrote:

On Wed, May 17, 2023 at 10:54:22AM +0800, zhenwei pi wrote:

v1 -> v2:
- Suggested by MST, use fast path for vring based performance
sensitive API.
- Reduce changes in tools/virtio.

Add test result(no obvious change):
Before:
time ./vringh_test --parallel
Using CPUS 0 and 191
Guest: notified 10036893, pinged 68278
Host: notified 68278, pinged 3093532

real0m14.463s
user0m6.437s
sys 0m8.010s

After:
time ./vringh_test --parallel
Using CPUS 0 and 191
Guest: notified 10036709, pinged 68347
Host: notified 68347, pinged 3085292

real0m14.196s
user0m6.289s
sys 0m7.885s

v1:
Hi,

3 weeks ago, I posted a proposal 'Virtio Over Fabrics':
https://lists.oasis-open.org/archives/virtio-comment/202304/msg00442.html

Jason and Stefan pointed out that a non-vring based virtqueue has a
chance to overwrite virtqueue instead of using vring virtqueue.

Then I try to abstract virtqueue related methods in this series, the
details changes see the comment of patch 'virtio: abstract virtqueue related 
methods'.

Something is still remained:
- __virtqueue_break/__virtqueue_unbreak is supposed to use by internal
virtio core, I'd like to rename them to vring_virtqueue_break
/vring_virtqueue_unbreak. Is this reasonable?


Why? These just set a flag?



Rename '__virtqueue_break' to 'vring_virtqueue_break', to make symbols
exported from virtio_ring.ko have unified prefix 'vring_virtqueue_xxx'.


I just do not see why you need these callbacks at all.



I use these callbacks for break/unbreak device like:
static inline void virtio_break_device(struct virtio_device *dev)
{
struct virtqueue *vq;

spin_lock(&dev->vqs_list_lock);
list_for_each_entry(vq, &dev->vqs, list) {
vq->__break(vq);
}
spin_unlock(&dev->vqs_list_lock);
}


- virtqueue_get_desc_addr/virtqueue_get_avail_addr/virtqueue_get_used_addr
/virtqueue_get_vring is vring specific, I'd like to rename them like
vring_virtqueue_get_desc_addr. Is this reasonable?
- there are still some functions in virtio_ring.c with prefix *virtqueue*,
for example 'virtqueue_add_split', just keep it or rename it to
'vring_virtqueue_add_split'?
zhenwei pi (2):
virtio: abstract virtqueue related methods
tools/virtio: implement virtqueue in test

   drivers/virtio/virtio_ring.c | 285 +-
   include/linux/virtio.h   | 441 +++
   include/linux/virtio_ring.h  |  26 +++
   tools/virtio/linux/virtio.h  | 355 +---
   4 files changed, 807 insertions(+), 300 deletions(-)

--
2.20.1




--
zhenwei pi




--
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Re: Re: [PATCH v2 0/2] virtio: abstract virtqueue related methods

2023-05-16 Thread Michael S. Tsirkin
On Wed, May 17, 2023 at 11:51:03AM +0800, zhenwei pi wrote:
> 
> 
> On 5/17/23 11:46, Michael S. Tsirkin wrote:
> > On Wed, May 17, 2023 at 10:54:22AM +0800, zhenwei pi wrote:
> > > v1 -> v2:
> > > - Suggested by MST, use fast path for vring based performance
> > > sensitive API.
> > > - Reduce changes in tools/virtio.
> > > 
> > > Add test result(no obvious change):
> > > Before:
> > > time ./vringh_test --parallel
> > > Using CPUS 0 and 191
> > > Guest: notified 10036893, pinged 68278
> > > Host: notified 68278, pinged 3093532
> > > 
> > > real  0m14.463s
> > > user  0m6.437s
> > > sys   0m8.010s
> > > 
> > > After:
> > > time ./vringh_test --parallel
> > > Using CPUS 0 and 191
> > > Guest: notified 10036709, pinged 68347
> > > Host: notified 68347, pinged 3085292
> > > 
> > > real  0m14.196s
> > > user  0m6.289s
> > > sys   0m7.885s
> > > 
> > > v1:
> > > Hi,
> > > 
> > > 3 weeks ago, I posted a proposal 'Virtio Over Fabrics':
> > > https://lists.oasis-open.org/archives/virtio-comment/202304/msg00442.html
> > > 
> > > Jason and Stefan pointed out that a non-vring based virtqueue has a
> > > chance to overwrite virtqueue instead of using vring virtqueue.
> > > 
> > > Then I try to abstract virtqueue related methods in this series, the
> > > details changes see the comment of patch 'virtio: abstract virtqueue 
> > > related methods'.
> > > 
> > > Something is still remained:
> > > - __virtqueue_break/__virtqueue_unbreak is supposed to use by internal
> > >virtio core, I'd like to rename them to vring_virtqueue_break
> > >/vring_virtqueue_unbreak. Is this reasonable?
> > 
> > Why? These just set a flag?
> > 
> 
> Rename '__virtqueue_break' to 'vring_virtqueue_break', to make symbols
> exported from virtio_ring.ko have unified prefix 'vring_virtqueue_xxx'.

I just do not see why you need these callbacks at all.

> > > - virtqueue_get_desc_addr/virtqueue_get_avail_addr/virtqueue_get_used_addr
> > >/virtqueue_get_vring is vring specific, I'd like to rename them like
> > >vring_virtqueue_get_desc_addr. Is this reasonable?
> > > - there are still some functions in virtio_ring.c with prefix *virtqueue*,
> > >for example 'virtqueue_add_split', just keep it or rename it to
> > >'vring_virtqueue_add_split'?
> > > zhenwei pi (2):
> > >virtio: abstract virtqueue related methods
> > >tools/virtio: implement virtqueue in test
> > > 
> > >   drivers/virtio/virtio_ring.c | 285 +-
> > >   include/linux/virtio.h   | 441 +++
> > >   include/linux/virtio_ring.h  |  26 +++
> > >   tools/virtio/linux/virtio.h  | 355 +---
> > >   4 files changed, 807 insertions(+), 300 deletions(-)
> > > 
> > > -- 
> > > 2.20.1
> > 
> 
> -- 
> zhenwei pi

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Re: Re: [PATCH v2 0/2] virtio: abstract virtqueue related methods

2023-05-16 Thread zhenwei pi via Virtualization




On 5/17/23 11:46, Michael S. Tsirkin wrote:

On Wed, May 17, 2023 at 10:54:22AM +0800, zhenwei pi wrote:

v1 -> v2:
- Suggested by MST, use fast path for vring based performance
sensitive API.
- Reduce changes in tools/virtio.

Add test result(no obvious change):
Before:
time ./vringh_test --parallel
Using CPUS 0 and 191
Guest: notified 10036893, pinged 68278
Host: notified 68278, pinged 3093532

real0m14.463s
user0m6.437s
sys 0m8.010s

After:
time ./vringh_test --parallel
Using CPUS 0 and 191
Guest: notified 10036709, pinged 68347
Host: notified 68347, pinged 3085292

real0m14.196s
user0m6.289s
sys 0m7.885s

v1:
Hi,

3 weeks ago, I posted a proposal 'Virtio Over Fabrics':
https://lists.oasis-open.org/archives/virtio-comment/202304/msg00442.html

Jason and Stefan pointed out that a non-vring based virtqueue has a
chance to overwrite virtqueue instead of using vring virtqueue.

Then I try to abstract virtqueue related methods in this series, the
details changes see the comment of patch 'virtio: abstract virtqueue related 
methods'.

Something is still remained:
- __virtqueue_break/__virtqueue_unbreak is supposed to use by internal
   virtio core, I'd like to rename them to vring_virtqueue_break
   /vring_virtqueue_unbreak. Is this reasonable?


Why? These just set a flag?



Rename '__virtqueue_break' to 'vring_virtqueue_break', to make symbols 
exported from virtio_ring.ko have unified prefix 'vring_virtqueue_xxx'.



- virtqueue_get_desc_addr/virtqueue_get_avail_addr/virtqueue_get_used_addr
   /virtqueue_get_vring is vring specific, I'd like to rename them like
   vring_virtqueue_get_desc_addr. Is this reasonable?
- there are still some functions in virtio_ring.c with prefix *virtqueue*,
   for example 'virtqueue_add_split', just keep it or rename it to
   'vring_virtqueue_add_split'?
zhenwei pi (2):
   virtio: abstract virtqueue related methods
   tools/virtio: implement virtqueue in test

  drivers/virtio/virtio_ring.c | 285 +-
  include/linux/virtio.h   | 441 +++
  include/linux/virtio_ring.h  |  26 +++
  tools/virtio/linux/virtio.h  | 355 +---
  4 files changed, 807 insertions(+), 300 deletions(-)

--
2.20.1




--
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Re: [PATCH v2 0/2] virtio: abstract virtqueue related methods

2023-05-16 Thread Michael S. Tsirkin
On Wed, May 17, 2023 at 10:54:22AM +0800, zhenwei pi wrote:
> v1 -> v2:
> - Suggested by MST, use fast path for vring based performance
> sensitive API.
> - Reduce changes in tools/virtio.
> 
> Add test result(no obvious change):
> Before:
> time ./vringh_test --parallel
> Using CPUS 0 and 191
> Guest: notified 10036893, pinged 68278
> Host: notified 68278, pinged 3093532
> 
> real  0m14.463s
> user  0m6.437s
> sys   0m8.010s
> 
> After:
> time ./vringh_test --parallel
> Using CPUS 0 and 191
> Guest: notified 10036709, pinged 68347
> Host: notified 68347, pinged 3085292
> 
> real  0m14.196s
> user  0m6.289s
> sys   0m7.885s
> 
> v1:
> Hi,
> 
> 3 weeks ago, I posted a proposal 'Virtio Over Fabrics':
> https://lists.oasis-open.org/archives/virtio-comment/202304/msg00442.html
> 
> Jason and Stefan pointed out that a non-vring based virtqueue has a
> chance to overwrite virtqueue instead of using vring virtqueue.
> 
> Then I try to abstract virtqueue related methods in this series, the
> details changes see the comment of patch 'virtio: abstract virtqueue related 
> methods'.
> 
> Something is still remained:
> - __virtqueue_break/__virtqueue_unbreak is supposed to use by internal
>   virtio core, I'd like to rename them to vring_virtqueue_break
>   /vring_virtqueue_unbreak. Is this reasonable?

Why? These just set a flag?

> - virtqueue_get_desc_addr/virtqueue_get_avail_addr/virtqueue_get_used_addr
>   /virtqueue_get_vring is vring specific, I'd like to rename them like
>   vring_virtqueue_get_desc_addr. Is this reasonable?
> - there are still some functions in virtio_ring.c with prefix *virtqueue*,
>   for example 'virtqueue_add_split', just keep it or rename it to
>   'vring_virtqueue_add_split'?
> zhenwei pi (2):
>   virtio: abstract virtqueue related methods
>   tools/virtio: implement virtqueue in test
> 
>  drivers/virtio/virtio_ring.c | 285 +-
>  include/linux/virtio.h   | 441 +++
>  include/linux/virtio_ring.h  |  26 +++
>  tools/virtio/linux/virtio.h  | 355 +---
>  4 files changed, 807 insertions(+), 300 deletions(-)
> 
> -- 
> 2.20.1

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