[virtio-dev] [PATCH v10 01/13] introduction: document bitfield notation

Bitfields are a useful and familiar way to specify sub-byte structure layout. The only issue is that bitfield order isn't portable across architectures. Document that we list bitfields from least to most significant one, and warn about portability issues. Signed-off-by: Michael S. Tsirkin

[virtio-dev] [PATCH v10 05/13] content: len -> used length, used ring -> vq

Document buffer used len and use that terminology everywhere in the generic section. Further, drop the 'used ring' terminology and just say virtqueue. Reviewed-by: Cornelia Huck Signed-off-by: Michael S. Tsirkin --- content.tex | 39

[virtio-dev] [PATCH v10 04/13] content: move virtqueue operation description

virtqueue operation description is specific to the virtqueue format. Move it out to split-ring.tex and update all references. Signed-off-by: Michael S. Tsirkin Reviewed-by: Cornelia Huck --- conformance.tex | 4 +- content.tex | 171

[virtio-dev] [PATCH v10 03/13] content: move ring text out to a separate file

Will be easier to manage this way. Signed-off-by: Michael S. Tsirkin Reviewed-by: Cornelia Huck --- content.tex| 499 + split-ring.tex | 498

[virtio-dev] [PATCH v10 12/13] packed-ring: add in order support

Support in-order requests for packed rings. This allows selective write-out of used descriptors. Signed-off-by: Michael S. Tsirkin Reviewed-by: Cornelia Huck Reviewed-by: Stefan Hajnoczi --- packed-ring.tex | 24

[virtio-dev] [PATCH v10 08/13] split-ring: generalize text

Update generic text to talk about available/used buffers, not rings. Move some split-ring specific text to the correct section. Update conformance section with link to the new conformance clause. Signed-off-by: Michael S. Tsirkin --- conformance.tex | 1 + content.tex |

[virtio-dev] [PATCH v10 13/13] split-ring: in order feature

For a split ring, require that drivers use descriptors in order too. This allows devices to skip reading the available ring. Signed-off-by: Michael S. Tsirkin Reviewed-by: Cornelia Huck Reviewed-by: Stefan Hajnoczi --- split-ring.tex |

[virtio-dev] [PATCH v10 11/13] content: in-order buffer use

Using descriptors in-order is sometimes beneficial. Add an option for that - per-format detail allowing more optimizations will be added by follow-up patches. Signed-off-by: Michael S. Tsirkin Reviewed-by: Cornelia Huck Reviewed-by: Stefan Hajnoczi

[virtio-dev] [PATCH v10 00/13] packed ring layout spec

This is a proposal to implement an alternative ring layout. The idea is to have a r/w descriptor in a ring structure, replacing the used and available ring, index and descriptor buffer. This is more efficient and easier for devices to implement than the 1.0 layout. Additionally, a new feature

[virtio-dev] [PATCH v10 02/13] content: move 1.0 queue format out to a separate section

Signed-off-by: Michael S. Tsirkin Reviewed-by: Cornelia Huck --- content.tex | 25 - 1 file changed, 24 insertions(+), 1 deletion(-) diff --git a/content.tex b/content.tex index c7ef7fd..4483a4b 100644 --- a/content.tex +++

[virtio-dev] Re: [PATCH v9 08/16] split-ring: generalize text

On Wed, Mar 07, 2018 at 12:00:48PM +0100, Cornelia Huck wrote: > On Thu, 1 Mar 2018 01:31:33 +0200 > "Michael S. Tsirkin" wrote: > > > Update generic text to talk about available/used buffers, not rings. > > Move some split-ring specific text to the correct section. > > > >

[virtio-dev] Re: [PATCH v2] content: document balloon memory statistics

On Thu, Feb 22, 2018 at 01:50:52PM +0100, Tomáš Golembiovský wrote: > Linux kernel provides some balloon memory statistics that were not > included in the specs. Include them to avoid any ID clashes in the > future. > > Signed-off-by: Tomáš Golembiovský No comments on this

Re: [virtio-dev] Re: [virtio] Re: [PATCH v9 14/16] VIRTIO_F_NOTIFICATION_DATA: extra data to devices

On 03/08/2018 05:19 PM, Michael S. Tsirkin wrote: > On Thu, Mar 08, 2018 at 02:03:31PM +0100, Halil Pasic wrote: >> One stray idea was something like >> >> be32 (A:16;B:15;C:1); >> >> With >> * A occupying bits 0-15 >> * B occupying bits 16-30 >> * C occupying bit 30 >> >> And bit n of B (n \in

Re: [virtio-dev] Re: [virtio] Re: [PATCH v9 14/16] VIRTIO_F_NOTIFICATION_DATA: extra data to devices

On Thu, 8 Mar 2018 18:19:39 +0200 "Michael S. Tsirkin" wrote: > On Thu, Mar 08, 2018 at 02:03:31PM +0100, Halil Pasic wrote: > > One stray idea was something like > > > > be32 (A:16;B:15;C:1); > > > > With > > * A occupying bits 0-15 > > * B occupying bits 16-30 > > * C

[virtio-dev] Re: [PATCH v4] virtio-blk: add discard and write zeroes features to specification

On Fri, Mar 09, 2018 at 10:44:23AM +0800, Changpeng Liu wrote: > Existing virtio-blk protocol doesn't have DISCARD/WRITE ZEROES support, > this will impact the performance when using SSD backend over file systems. > > Here is the proposal to extend existing virtio-blk protocol to support >

Re: [virtio-dev] Re: [virtio] Re: [PATCH v9 14/16] VIRTIO_F_NOTIFICATION_DATA: extra data to devices

On Fri, Mar 09, 2018 at 01:25:11PM +0100, Halil Pasic wrote: > > > On 03/08/2018 05:19 PM, Michael S. Tsirkin wrote: > > On Thu, Mar 08, 2018 at 02:03:31PM +0100, Halil Pasic wrote: > >> One stray idea was something like > >> > >> be32 (A:16;B:15;C:1); > >> > >> With > >> * A occupying bits

[virtio-dev] Re: [PATCH v9 00/16] packed ring layout spec

On Thu, Mar 01, 2018 at 01:31:18AM +0200, Michael S. Tsirkin wrote: > This addresses comments on v8. > > Thanks a lot to all reviewers of v8 - I hope we are > finally there or almost there. FYI the last round of comments was mostly about formatting, so I plan to post v10 and start voting