similar to: [kvm-devel] [PATCH 00/10] PV-IO v3

Hello Rusty, while playing with your virtio descriptor code, I realized that the desc_pages data structure is not 64 bit safe. struct lguest_desc desc[NUM_DESCS] can be smaller than a page, as struct lguest_desc is 24 bytes on 64bit systems. Lets add a char padding to make the next page really page aligned. Btw. the new_io_desc.patch does not apply on current git. What base should I use?

Hello Rusty, while playing with your virtio descriptor code, I realized that the desc_pages data structure is not 64 bit safe. struct lguest_desc desc[NUM_DESCS] can be smaller than a page, as struct lguest_desc is 24 bytes on 64bit systems. Lets add a char padding to make the next page really page aligned. Btw. the new_io_desc.patch does not apply on current git. What base should I use?

For virtualization, we've developed virtio_ring for efficient communication. This would also work well for userspace-kernel communication, particularly for things like the tun device. By using the same ABI, we can join guests to the host kernel trivially. These patches are fairly alpha; I've seen some network stalls I have to track down and there are some fixmes. Comments welcome!

For virtualization, we've developed virtio_ring for efficient communication. This would also work well for userspace-kernel communication, particularly for things like the tun device. By using the same ABI, we can join guests to the host kernel trivially. These patches are fairly alpha; I've seen some network stalls I have to track down and there are some fixmes. Comments welcome!

The PAGE_SIZE constant should be used instead of taking an extra parameter. Moreover, once we use PAGE_SIZE, we can use PAGE_ALIGN() instead of having it open coded. I've only compile tested the lguest launcher as I'm on a 64-bit system but I've tested the virtio-pci device with KVM. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> diff --git

The PAGE_SIZE constant should be used instead of taking an extra parameter. Moreover, once we use PAGE_SIZE, we can use PAGE_ALIGN() instead of having it open coded. I've only compile tested the lguest launcher as I'm on a 64-bit system but I've tested the virtio-pci device with KVM. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> diff --git

From 5d85cee1fb14608b79b5b6103d8be2d90bb76ca4 Mon Sep 17 00:00:00 2001 From: Anthony Liguori <aliguori@us.ibm.com> Date: Mon, 12 Nov 2007 21:30:26 -0600 Subject: [PATCH] virtio: simplify config mechanism. Previously we used a type/len pair within the config space, but this seems overkill. We now simply define a structure which represents the layout in the config space: the config space can

From 5d85cee1fb14608b79b5b6103d8be2d90bb76ca4 Mon Sep 17 00:00:00 2001 From: Anthony Liguori <aliguori@us.ibm.com> Date: Mon, 12 Nov 2007 21:30:26 -0600 Subject: [PATCH] virtio: simplify config mechanism. Previously we used a type/len pair within the config space, but this seems overkill. We now simply define a structure which represents the layout in the config space: the config space can

The following changes since commit 3c92ec8ae91ecf59d88c798301833d7cf83f2179: Linus Torvalds (1): Merge branch 'next' of git://git.kernel.org/.../paulus/powerpc are available in the git repository at: ssh://master.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus.git master

The following changes since commit 3c92ec8ae91ecf59d88c798301833d7cf83f2179: Linus Torvalds (1): Merge branch 'next' of git://git.kernel.org/.../paulus/powerpc are available in the git repository at: ssh://master.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus.git master

> -----Original Message----- > From: virtio-dev at lists.oasis-open.org [mailto:virtio-dev at lists.oasis-open.org] > On Behalf Of Michael S. Tsirkin > Sent: Wednesday, February 08, 2017 5:20 AM > To: virtio-dev at lists.oasis-open.org > Cc: virtualization at lists.linux-foundation.org > Subject: [virtio-dev] packed ring layout proposal v2 > > This is an update from v1

On Wed, Sep 20, 2017 at 09:11:57AM +0000, Liang, Cunming wrote: > Hi Michael, > > > -----Original Message----- > > From: virtio-dev at lists.oasis-open.org [mailto:virtio-dev at lists.oasis-open.org] > > On Behalf Of Michael S. Tsirkin > > Sent: Sunday, September 10, 2017 1:06 PM > > To: virtio-dev at lists.oasis-open.org > > Cc: virtualization at

On Wed, Sep 20, 2017 at 09:11:57AM +0000, Liang, Cunming wrote: > Hi Michael, > > > -----Original Message----- > > From: virtio-dev at lists.oasis-open.org [mailto:virtio-dev at lists.oasis-open.org] > > On Behalf Of Michael S. Tsirkin > > Sent: Sunday, September 10, 2017 1:06 PM > > To: virtio-dev at lists.oasis-open.org > > Cc: virtualization at

> -----Original Message----- > From: Michael S. Tsirkin [mailto:mst at redhat.com] > Sent: Tuesday, July 18, 2017 7:23 PM > To: Lior Narkis <liorn at mellanox.com> > Cc: virtio-dev at lists.oasis-open.org; virtualization at lists.linux-foundation.org > Subject: Re: [virtio-dev] packed ring layout proposal v2 > > On Sun, Jul 16, 2017 at 06:00:45AM +0000, Lior Narkis

> -----Original Message----- > From: Michael S. Tsirkin [mailto:mst at redhat.com] > Sent: Tuesday, July 18, 2017 7:23 PM > To: Lior Narkis <liorn at mellanox.com> > Cc: virtio-dev at lists.oasis-open.org; virtualization at lists.linux-foundation.org > Subject: Re: [virtio-dev] packed ring layout proposal v2 > > On Sun, Jul 16, 2017 at 06:00:45AM +0000, Lior Narkis

This is an update from v1 version. Changes: - update event suppression mechanism - separate options for indirect and direct s/g - lots of new features --- Performance analysis of this is in my kvm forum 2016 presentation. The idea is to have a r/w descriptor in a ring structure, replacing the used and available ring, index and descriptor buffer. * Descriptor ring: Guest adds descriptors with

This is an update from v1 version. Changes: - update event suppression mechanism - separate options for indirect and direct s/g - lots of new features --- Performance analysis of this is in my kvm forum 2016 presentation. The idea is to have a r/w descriptor in a ring structure, replacing the used and available ring, index and descriptor buffer. * Descriptor ring: Guest adds descriptors with

Virtio BoF minutes KVM Forum 2017 Attendees: Amnon Ilan, Maxime Coqueline, Vlad Yasevich, Malcolm Crossley, David Vrabel, Ilya Lesokhin, Cunming Lian, Jens Freimann Topics: packed ring layout with respect to hardware implementations References: https://lists.oasis-open.org/archives/virtio-dev/201702/msg00010.html https://lists.oasis-open.org/archives/virtio-dev/201709/msg00013.html Malcolm

Virtio BoF minutes KVM Forum 2017 Attendees: Amnon Ilan, Maxime Coqueline, Vlad Yasevich, Malcolm Crossley, David Vrabel, Ilya Lesokhin, Cunming Lian, Jens Freimann Topics: packed ring layout with respect to hardware implementations References: https://lists.oasis-open.org/archives/virtio-dev/201702/msg00010.html https://lists.oasis-open.org/archives/virtio-dev/201709/msg00013.html Malcolm

On Tue, Apr 24, 2018 at 09:16:38AM +0800, Tiwei Bie wrote: > On Tue, Apr 24, 2018 at 04:05:07AM +0300, Michael S. Tsirkin wrote: > > On Tue, Apr 24, 2018 at 08:54:52AM +0800, Jason Wang wrote: > > > > > > > > > On 2018?04?23? 17:29, Tiwei Bie wrote: > > > > On Mon, Apr 23, 2018 at 01:42:14PM +0800, Jason Wang wrote: > > > > > On