[virtio-dev] Re: [PATCH 0/3] virtio-spec: Add documentation for recently added balloon features

2020-05-11 Thread Alexander Duyck
On Mon, May 11, 2020 at 5:44 AM David Hildenbrand wrote: > > On 11.05.20 14:38, Cornelia Huck wrote: > > On Fri, 08 May 2020 10:16:14 -0700 > > Alexander Duyck wrote: > > > >> This patch set is meant to add documentation for balloon features that have > >> been recently added to the Linux kernel[

[virtio-dev] Re: [PATCH 1/3] content: Document balloon feature free page hints

2020-05-11 Thread Cornelia Huck
On Mon, 11 May 2020 08:22:02 -0700 Alexander Duyck wrote: > On Mon, May 11, 2020 at 5:10 AM Cornelia Huck wrote: > > > > On Fri, 08 May 2020 10:16:22 -0700 > > Alexander Duyck wrote: > > > > > From: Alexander Duyck > > > > > > Free page hints allow the balloon driver to provide information o

[virtio-dev] Re: [PATCH 3/3] content: Document balloon feature free page reporting

2020-05-11 Thread Alexander Duyck
I have incorporated your feedback. Thanks. - Alex On Mon, May 11, 2020 at 5:36 AM Cornelia Huck wrote: > > On Fri, 08 May 2020 10:16:36 -0700 > Alexander Duyck wrote: > > > From: Alexander Duyck > > > > Free page reporting is a feature that allows the guest to proactively > > report unused pa

[virtio-dev] Re: [PATCH 2/3] content: Document balloon feature page poison

2020-05-11 Thread Alexander Duyck
Thanks. I will incorporate the feedback below for v2. On Mon, May 11, 2020 at 5:25 AM Cornelia Huck wrote: > > On Fri, 08 May 2020 10:16:29 -0700 > Alexander Duyck wrote: > > > From: Alexander Duyck > > > > Page poison provides a way for the guest to notify the host of the content > > expected

[virtio-dev] Re: [PATCH 1/3] content: Document balloon feature free page hints

2020-05-11 Thread Alexander Duyck
On Mon, May 11, 2020 at 5:10 AM Cornelia Huck wrote: > > On Fri, 08 May 2020 10:16:22 -0700 > Alexander Duyck wrote: > > > From: Alexander Duyck > > > > Free page hints allow the balloon driver to provide information on what > > pages are not currently in use so that we can avoid the cost of cop

Re: [virtio-dev] Re: Fwd: Qemu Support for Virtio Video V4L2 driver

2020-05-11 Thread Keiichi Watanabe
Hi Saket, On Mon, May 11, 2020 at 9:33 PM Saket Sinha wrote: > > Hi Keiichi, > > > > > I do not support the approach of QEMU implementation forwarding > > > > requests to the host's vicodec module since this can limit the scope > > > > of the virtio-video device only for testing, > > > > > > Th

[virtio-dev] Re: [PATCH 0/3] virtio-spec: Add documentation for recently added balloon features

2020-05-11 Thread David Hildenbrand
On 11.05.20 14:38, Cornelia Huck wrote: > On Fri, 08 May 2020 10:16:14 -0700 > Alexander Duyck wrote: > >> This patch set is meant to add documentation for balloon features that have >> been recently added to the Linux kernel[1,2] and that we are currently >> working on adding to QEMU[3]. >> >> C

[virtio-dev] Re: [PATCH 0/3] virtio-spec: Add documentation for recently added balloon features

2020-05-11 Thread Cornelia Huck
On Fri, 08 May 2020 10:16:14 -0700 Alexander Duyck wrote: > This patch set is meant to add documentation for balloon features that have > been recently added to the Linux kernel[1,2] and that we are currently > working on adding to QEMU[3]. > > Changes since RFC: > Incorporated suggestions from

[virtio-dev] Re: [PATCH 3/3] content: Document balloon feature free page reporting

2020-05-11 Thread Cornelia Huck
On Fri, 08 May 2020 10:16:36 -0700 Alexander Duyck wrote: > From: Alexander Duyck > > Free page reporting is a feature that allows the guest to proactively > report unused pages to the host. By making use of this feature is is > possible to reduce the overall memory footprint of the guest in ca

Re: [virtio-dev] Re: Fwd: Qemu Support for Virtio Video V4L2 driver

2020-05-11 Thread Saket Sinha
Hi Keiichi, > > > I do not support the approach of QEMU implementation forwarding > > > requests to the host's vicodec module since this can limit the scope > > > of the virtio-video device only for testing, > > > > That was my understanding as well. > > Not really because the API which the vico

[virtio-dev] Re: [PATCH 2/3] content: Document balloon feature page poison

2020-05-11 Thread Cornelia Huck
On Fri, 08 May 2020 10:16:29 -0700 Alexander Duyck wrote: > From: Alexander Duyck > > Page poison provides a way for the guest to notify the host of the content > expected to be found in pages when they are added back to the guest after > being discarded. The feature currently doesn't apply to

[virtio-dev] Re: [PATCH 1/3] content: Document balloon feature free page hints

2020-05-11 Thread Cornelia Huck
On Fri, 08 May 2020 10:16:22 -0700 Alexander Duyck wrote: > From: Alexander Duyck > > Free page hints allow the balloon driver to provide information on what > pages are not currently in use so that we can avoid the cost of copying > them in migration scenarios. Add a feature description for fr

Re: [virtio-dev] Re: Fwd: Qemu Support for Virtio Video V4L2 driver

2020-05-11 Thread Keiichi Watanabe
Hi, Thanks Saket for your feedback. As Dmitry mentioned, we're focusing on video encoding and decoding, not camera. So, my reply was about how to implement paravirtualized video codec devices. On Mon, May 11, 2020 at 8:25 PM Dmitry Sepp wrote: > > Hi Saket, > > On Montag, 11. Mai 2020 13:05:53 C

Re: [virtio-dev] Re: Fwd: Qemu Support for Virtio Video V4L2 driver

2020-05-11 Thread Michael S. Tsirkin
On Mon, May 11, 2020 at 01:25:23PM +0200, Dmitry Sepp wrote: > Hi Saket, > > On Montag, 11. Mai 2020 13:05:53 CEST Saket Sinha wrote: > > Hi Keiichi, > > > > I do not support the approach of QEMU implementation forwarding > > requests to the host's vicodec module since this can limit the scope

Re: [virtio-dev] Re: Fwd: Qemu Support for Virtio Video V4L2 driver

2020-05-11 Thread Michael S. Tsirkin
On Mon, May 11, 2020 at 01:25:23PM +0200, Dmitry Sepp wrote: > Hi Saket, > > On Montag, 11. Mai 2020 13:05:53 CEST Saket Sinha wrote: > > Hi Keiichi, > > > > I do not support the approach of QEMU implementation forwarding > > requests to the host's vicodec module since this can limit the scope

Re: [virtio-dev] Re: Fwd: Qemu Support for Virtio Video V4L2 driver

2020-05-11 Thread Dmitry Sepp
Hi Saket, On Montag, 11. Mai 2020 13:05:53 CEST Saket Sinha wrote: > Hi Keiichi, > > I do not support the approach of QEMU implementation forwarding > requests to the host's vicodec module since this can limit the scope > of the virtio-video device only for testing, That was my understanding a

Re: [virtio-dev] Re: Fwd: Qemu Support for Virtio Video V4L2 driver

2020-05-11 Thread Saket Sinha
Hi Keiichi, I do not support the approach of QEMU implementation forwarding requests to the host's vicodec module since this can limit the scope of the virtio-video device only for testing, which instead can be used with multiple use cases such as - 1. VM gets access to paravirtualized camera

Re: [virtio-dev] Re: Fwd: Qemu Support for Virtio Video V4L2 driver

2020-05-11 Thread Keiichi Watanabe
Hi Dmitry, On Mon, May 11, 2020 at 6:40 PM Dmitry Sepp wrote: > > Hi Saket and all, > > As we are working with automotive platforms, unfortunately we don't plan any > Qemu reference implementation so far. > > Of course we are ready to support the community if any help is needed. Is > there intere

[virtio-dev] Re: Fwd: Qemu Support for Virtio Video V4L2 driver

2020-05-11 Thread Dmitry Sepp
Hi Saket and all, As we are working with automotive platforms, unfortunately we don't plan any Qemu reference implementation so far. Of course we are ready to support the community if any help is needed. Is there interest in support for the FWHT format only for testing purpose or you want a fu