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On Thu, 2015-09-10 at 15:38 +0100, Stefan Hajnoczi wrote: > On Thu, Sep 10, 2015 at 6:48 AM, Ming Lin <mlin at kernel.org> wrote: > > These 2 patches added virtio-nvme to kernel and qemu, > > basically modified from virtio-blk and nvme code. > > > > As title said, request for your comments. > > > > Play it in Qemu with: > > -drive file=disk.img,format=raw,if=none,id=D22 \ > > -device virtio-nvme-pci,drive=D22,serial=1234,...

...> > On Thu, 2015-09-10 at 10:28 -0700, Ming Lin wrote: > > > > On Thu, 2015-09-10 at 15:38 +0100, Stefan Hajnoczi wrote: > > > > > On Thu, Sep 10, 2015 at 6:48 AM, Ming Lin <mlin at kernel.org> wrote: > > > > > > These 2 patches added virtio-nvme to kernel and qemu, > > > > > > basically modified from virtio-blk and nvme code. > > > > > > > > > > > > As title said, request for your comments. > > > > > > <SNIP> > > > > > > > > > > &...

On Thu, 2015-09-10 at 15:38 +0100, Stefan Hajnoczi wrote: > On Thu, Sep 10, 2015 at 6:48 AM, Ming Lin <mlin at kernel.org> wrote: > > These 2 patches added virtio-nvme to kernel and qemu, > > basically modified from virtio-blk and nvme code. > > > > As title said, request for your comments. > > > > Play it in Qemu with: > > -drive file=disk.img,format=raw,if=none,id=D22 \ > > -device virtio-nvme-pci,drive=D22,serial=1234,...

...> > On Thu, 2015-09-10 at 10:28 -0700, Ming Lin wrote: > > > > On Thu, 2015-09-10 at 15:38 +0100, Stefan Hajnoczi wrote: > > > > > On Thu, Sep 10, 2015 at 6:48 AM, Ming Lin <mlin at kernel.org> wrote: > > > > > > These 2 patches added virtio-nvme to kernel and qemu, > > > > > > basically modified from virtio-blk and nvme code. > > > > > > > > > > > > As title said, request for your comments. > > > > > > <SNIP> > > > > > > > > > > &...

...wrote: > Hi Ming & Co, > > On Thu, 2015-09-10 at 10:28 -0700, Ming Lin wrote: > > On Thu, 2015-09-10 at 15:38 +0100, Stefan Hajnoczi wrote: > > > On Thu, Sep 10, 2015 at 6:48 AM, Ming Lin <mlin at kernel.org> wrote: > > > > These 2 patches added virtio-nvme to kernel and qemu, > > > > basically modified from virtio-blk and nvme code. > > > > > > > > As title said, request for your comments. > > <SNIP> > > > > > > > At first glance it seems like the virtio_nvme guest driver is just...

...wrote: > Hi Ming & Co, > > On Thu, 2015-09-10 at 10:28 -0700, Ming Lin wrote: > > On Thu, 2015-09-10 at 15:38 +0100, Stefan Hajnoczi wrote: > > > On Thu, Sep 10, 2015 at 6:48 AM, Ming Lin <mlin at kernel.org> wrote: > > > > These 2 patches added virtio-nvme to kernel and qemu, > > > > basically modified from virtio-blk and nvme code. > > > > > > > > As title said, request for your comments. > > <SNIP> > > > > > > > At first glance it seems like the virtio_nvme guest driver is just...

On Thu, 2015-09-10 at 14:02 +0000, Keith Busch wrote: > On Wed, 9 Sep 2015, Ming Lin wrote: > > The goal is to have a full NVMe stack from VM guest(virtio-nvme) > > to host(vhost_nvme) to LIO NVMe-over-fabrics target. > > > > Now there are lots of duplicated code with linux/nvme-core.c and qemu/nvme.c. > > The ideal result is to have a multi level NVMe stack(similar as SCSI). > > So we can re-u...

On Thu, 2015-09-10 at 14:02 +0000, Keith Busch wrote: > On Wed, 9 Sep 2015, Ming Lin wrote: > > The goal is to have a full NVMe stack from VM guest(virtio-nvme) > > to host(vhost_nvme) to LIO NVMe-over-fabrics target. > > > > Now there are lots of duplicated code with linux/nvme-core.c and qemu/nvme.c. > > The ideal result is to have a multi level NVMe stack(similar as SCSI). > > So we can re-u...

...noczi wrote: > On Thu, Sep 10, 2015 at 6:28 PM, Ming Lin <mlin at kernel.org> wrote: > > On Thu, 2015-09-10 at 15:38 +0100, Stefan Hajnoczi wrote: > >> On Thu, Sep 10, 2015 at 6:48 AM, Ming Lin <mlin at kernel.org> wrote: > >> > These 2 patches added virtio-nvme to kernel and qemu, > >> > basically modified from virtio-blk and nvme code. > >> > > >> > As title said, request for your comments. > >> > > >> > Play it in Qemu with: > >> > -drive file=disk.img,format=raw,if=none,id=D22 \ &g...

...noczi wrote: > On Thu, Sep 10, 2015 at 6:28 PM, Ming Lin <mlin at kernel.org> wrote: > > On Thu, 2015-09-10 at 15:38 +0100, Stefan Hajnoczi wrote: > >> On Thu, Sep 10, 2015 at 6:48 AM, Ming Lin <mlin at kernel.org> wrote: > >> > These 2 patches added virtio-nvme to kernel and qemu, > >> > basically modified from virtio-blk and nvme code. > >> > > >> > As title said, request for your comments. > >> > > >> > Play it in Qemu with: > >> > -drive file=disk.img,format=raw,if=none,id=D22 \ &g...

...5-09-17 at 17:55 -0700, Nicholas A. Bellinger wrote: > > On Thu, 2015-09-17 at 16:31 -0700, Ming Lin wrote: > > > On Wed, 2015-09-16 at 23:10 -0700, Nicholas A. Bellinger wrote: > > > > Hi Ming & Co, <SNIP> > > > > > I think the future "LIO NVMe target" only speaks NVMe protocol. > > > > > > > > > > Nick(CCed), could you correct me if I'm wrong? > > > > > > > > > > For SCSI stack, we have: > > > > > virtio-scsi(guest) > > > > > tcm_vhost(or...

> What do you think about virtio-nvme+vhost-nvme? What would be the advantage over virtio-blk? Multiqueue is not supported by QEMU but it's already supported by Linux (commit 6a27b656fc). To me, the advantage of nvme is that it provides more than decent performance on unmodified Windows guests, and thanks to your vendor extensio...

> What do you think about virtio-nvme+vhost-nvme? What would be the advantage over virtio-blk? Multiqueue is not supported by QEMU but it's already supported by Linux (commit 6a27b656fc). To me, the advantage of nvme is that it provides more than decent performance on unmodified Windows guests, and thanks to your vendor extensio...

On 01/12/2015 00:20, Ming Lin wrote: > qemu-nvme: 148MB/s > vhost-nvme + google-ext: 230MB/s > qemu-nvme + google-ext + eventfd: 294MB/s > virtio-scsi: 296MB/s > virtio-blk: 344MB/s > > "vhost-nvme + google-ext" didn't get good enough performance. I'd expect it to be on par of qemu-nvme with ioeventfd but the...

On 01/12/2015 00:20, Ming Lin wrote: > qemu-nvme: 148MB/s > vhost-nvme + google-ext: 230MB/s > qemu-nvme + google-ext + eventfd: 294MB/s > virtio-scsi: 296MB/s > virtio-blk: 344MB/s > > "vhost-nvme + google-ext" didn't get good enough performance. I'd expect it to be on par of qemu-nvme with ioeventfd but the...

...Bellinger wrote: > > > On Thu, 2015-09-17 at 16:31 -0700, Ming Lin wrote: > > > > On Wed, 2015-09-16 at 23:10 -0700, Nicholas A. Bellinger wrote: > > > > > Hi Ming & Co, > > <SNIP> > > > > > > > I think the future "LIO NVMe target" only speaks NVMe protocol. > > > > > > > > > > > > Nick(CCed), could you correct me if I'm wrong? > > > > > > > > > > > > For SCSI stack, we have: > > > > > > virtio-scsi(guest) > > &g...

...Bellinger wrote: > > > On Thu, 2015-09-17 at 16:31 -0700, Ming Lin wrote: > > > > On Wed, 2015-09-16 at 23:10 -0700, Nicholas A. Bellinger wrote: > > > > > Hi Ming & Co, > > <SNIP> > > > > > > > I think the future "LIO NVMe target" only speaks NVMe protocol. > > > > > > > > > > > > Nick(CCed), could you correct me if I'm wrong? > > > > > > > > > > > > For SCSI stack, we have: > > > > > > virtio-scsi(guest) > > &g...

Hi Ming & Co, On Thu, 2015-09-10 at 10:28 -0700, Ming Lin wrote: > On Thu, 2015-09-10 at 15:38 +0100, Stefan Hajnoczi wrote: > > On Thu, Sep 10, 2015 at 6:48 AM, Ming Lin <mlin at kernel.org> wrote: > > > These 2 patches added virtio-nvme to kernel and qemu, > > > basically modified from virtio-blk and nvme code. > > > > > > As title said, request for your comments. <SNIP> > > > > At first glance it seems like the virtio_nvme guest driver is just > > another block driver like vir...

On Tue, 2015-12-01 at 17:02 +0100, Paolo Bonzini wrote: > > On 01/12/2015 00:20, Ming Lin wrote: > > qemu-nvme: 148MB/s > > vhost-nvme + google-ext: 230MB/s > > qemu-nvme + google-ext + eventfd: 294MB/s > > virtio-scsi: 296MB/s > > virtio-blk: 344MB/s > > > > "vhost-nvme + google-ext" didn't get good enough performance. > > I'd expect it to be on...

...Co, > > > > On Thu, 2015-09-10 at 10:28 -0700, Ming Lin wrote: > > > On Thu, 2015-09-10 at 15:38 +0100, Stefan Hajnoczi wrote: > > > > On Thu, Sep 10, 2015 at 6:48 AM, Ming Lin <mlin at kernel.org> wrote: > > > > > These 2 patches added virtio-nvme to kernel and qemu, > > > > > basically modified from virtio-blk and nvme code. > > > > > > > > > > As title said, request for your comments. > > > > <SNIP> > > > > > > > > > > At first glance it seems l...