search for: ilyal

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2017 Oct 30
2
packed ring layout proposal v3
On Sun, Oct 29, 2017 at 02:34:56PM +0000, Ilya Lesokhin wrote: > > -----Original Message----- > > From: Michael S. Tsirkin [mailto:mst at redhat.com] > > Sent: Sunday, October 29, 2017 4:22 PM > > To: Ilya Lesokhin <ilyal at mellanox.com> > > Cc: virtio-dev at lists.oasis-open.org; virtualization at lists.linux-foundation.org > > Subject: Re: packed ring layout proposal v3 > > > > If you do this whats the point of the id? Just use descriptor offset like virtio 0 did. > > > >...
2017 Oct 30
2
packed ring layout proposal v3
On Sun, Oct 29, 2017 at 02:34:56PM +0000, Ilya Lesokhin wrote: > > -----Original Message----- > > From: Michael S. Tsirkin [mailto:mst at redhat.com] > > Sent: Sunday, October 29, 2017 4:22 PM > > To: Ilya Lesokhin <ilyal at mellanox.com> > > Cc: virtio-dev at lists.oasis-open.org; virtualization at lists.linux-foundation.org > > Subject: Re: packed ring layout proposal v3 > > > > If you do this whats the point of the id? Just use descriptor offset like virtio 0 did. > > > >...
2017 Oct 29
2
packed ring layout proposal v3
...n solve the problem I presented but it is still more > expensive then not doing ID allocation at all. > > > > -----Original Message----- > > From: Michael S. Tsirkin [mailto:mst at redhat.com] > > Sent: Wednesday, October 25, 2017 7:20 PM > > To: Ilya Lesokhin <ilyal at mellanox.com> > > Cc: virtio-dev at lists.oasis-open.org; virtualization at lists.linux-foundation.org > > Subject: Re: packed ring layout proposal v3 > > > > On Sun, Oct 08, 2017 at 06:16:44AM +0000, Ilya Lesokhin wrote: > > > > > -----Original Message...
2017 Oct 29
2
packed ring layout proposal v3
...n solve the problem I presented but it is still more > expensive then not doing ID allocation at all. > > > > -----Original Message----- > > From: Michael S. Tsirkin [mailto:mst at redhat.com] > > Sent: Wednesday, October 25, 2017 7:20 PM > > To: Ilya Lesokhin <ilyal at mellanox.com> > > Cc: virtio-dev at lists.oasis-open.org; virtualization at lists.linux-foundation.org > > Subject: Re: packed ring layout proposal v3 > > > > On Sun, Oct 08, 2017 at 06:16:44AM +0000, Ilya Lesokhin wrote: > > > > > -----Original Message...
2017 Oct 30
0
packed ring layout proposal v3
> -----Original Message----- > From: Michael S. Tsirkin [mailto:mst at redhat.com] > Sent: Monday, October 30, 2017 4:09 AM > To: Ilya Lesokhin <ilyal at mellanox.com> > Cc: virtio-dev at lists.oasis-open.org; virtualization at lists.linux-foundation.org > Subject: Re: packed ring layout proposal v3 > > On Sun, Oct 29, 2017 at 02:34:56PM +0000, Ilya Lesokhin wrote: > > > -----Original Message----- > > > From: Mic...
2017 Oct 25
2
packed ring layout proposal v3
On Sun, Oct 08, 2017 at 06:16:44AM +0000, Ilya Lesokhin wrote: > > > -----Original Message----- > > > From: virtualization-bounces at lists.linux-foundation.org > > > [mailto:virtualization-bounces at lists.linux-foundation.org] On Behalf > > > Of Michael S. Tsirkin > > > > > > This is an update from v2 version. > >> ... > > >
2017 Oct 25
2
packed ring layout proposal v3
On Sun, Oct 08, 2017 at 06:16:44AM +0000, Ilya Lesokhin wrote: > > > -----Original Message----- > > > From: virtualization-bounces at lists.linux-foundation.org > > > [mailto:virtualization-bounces at lists.linux-foundation.org] On Behalf > > > Of Michael S. Tsirkin > > > > > > This is an update from v2 version. > >> ... > > >
2017 Oct 29
0
packed ring layout proposal v3
...A simple allocator for the IDs can solve the problem I presented but it is still more expensive then not doing ID allocation at all. > -----Original Message----- > From: Michael S. Tsirkin [mailto:mst at redhat.com] > Sent: Wednesday, October 25, 2017 7:20 PM > To: Ilya Lesokhin <ilyal at mellanox.com> > Cc: virtio-dev at lists.oasis-open.org; virtualization at lists.linux-foundation.org > Subject: Re: packed ring layout proposal v3 > > On Sun, Oct 08, 2017 at 06:16:44AM +0000, Ilya Lesokhin wrote: > > > > -----Original Message----- > > > >...
2017 Oct 29
0
packed ring layout proposal v3
> -----Original Message----- > From: Michael S. Tsirkin [mailto:mst at redhat.com] > Sent: Sunday, October 29, 2017 4:22 PM > To: Ilya Lesokhin <ilyal at mellanox.com> > Cc: virtio-dev at lists.oasis-open.org; virtualization at lists.linux-foundation.org > Subject: Re: packed ring layout proposal v3 > > If you do this whats the point of the id? Just use descriptor offset like virtio 0 did. > I agree that ID is pointless when...
2017 Oct 08
0
packed ring layout proposal v3
> > -----Original Message----- > > From: virtualization-bounces at lists.linux-foundation.org > > [mailto:virtualization-bounces at lists.linux-foundation.org] On Behalf > > Of Michael S. Tsirkin > > > > This is an update from v2 version. >> ... > > When driver descriptors are chained in this way, multiple descriptors > > are treated as a part
2018 Jan 14
1
PCIe ordering and new VIRTIO packed ring format.
Hi, I have a concern about the portability of offloading the new VIRTIO packed ring format to hardware. According to the PCIe rev 2.0, paragraph 2.4.2. Update Ordering and Granularity Observed by a Read Transaction" " if a host CPU writes a QWORD to host memory, a Requester reading that QWORD from host memory may observe a portion of the QWORD updated and another portion of it
2017 Nov 01
2
Virtio BoF minutes from KVM Forum 2017
On Wednesday, November 01, 2017 4:59 PM, Michael S. Tsirkin wrote: > On Sun, Oct 29, 2017 at 01:52:25PM +0100, Jens Freimann wrote: > > Ilya: - you might have more completions than descriptors available > > - partial descriptor chains are a problem for hardware because you > > might have to read a bunch of conscriptors twice - how would you do > > deal with a big
2017 Nov 01
2
Virtio BoF minutes from KVM Forum 2017
On Wednesday, November 01, 2017 4:59 PM, Michael S. Tsirkin wrote: > On Sun, Oct 29, 2017 at 01:52:25PM +0100, Jens Freimann wrote: > > Ilya: - you might have more completions than descriptors available > > - partial descriptor chains are a problem for hardware because you > > might have to read a bunch of conscriptors twice - how would you do > > deal with a big
2017 Nov 01
2
Virtio BoF minutes from KVM Forum 2017
On Wednesday, November 1, 2017 7:35 PM, Michael S. Tsirkin wrote: > > You have to either use and additional descriptor for metadata per chain. > > Or putting it in one of the buffers and forcing the lifetime of the metadata > and data to be the same. > > That's true. It would be easy to make descriptors e.g. 32 bytes each, so > you can add extra data in there. Or if we
2017 Nov 01
2
Virtio BoF minutes from KVM Forum 2017
On Wednesday, November 1, 2017 7:35 PM, Michael S. Tsirkin wrote: > > You have to either use and additional descriptor for metadata per chain. > > Or putting it in one of the buffers and forcing the lifetime of the metadata > and data to be the same. > > That's true. It would be easy to make descriptors e.g. 32 bytes each, so > you can add extra data in there. Or if we