search for: 88c85538

On Fri, Oct 12, 2018 at 02:06:28PM -0700, Daniel Verkamp wrote: > From: Changpeng Liu <changpeng.liu at intel.com> > > In commit 88c85538, "virtio-blk: add discard and write zeroes features > to specification" (https://github.com/oasis-tcs/virtio-spec), the virtio There is some issues in this spec. For one using the multiple ranges also for write zeroes is rather inefficient. Write zeroes really should use the same fo...

On Fri, Oct 12, 2018 at 02:06:28PM -0700, Daniel Verkamp wrote: > From: Changpeng Liu <changpeng.liu at intel.com> > > In commit 88c85538, "virtio-blk: add discard and write zeroes features > to specification" (https://github.com/oasis-tcs/virtio-spec), the virtio There is some issues in this spec. For one using the multiple ranges also for write zeroes is rather inefficient. Write zeroes really should use the same fo...

On Thu, Nov 01, 2018 at 03:40:35PM -0700, Daniel Verkamp wrote: > From: Changpeng Liu <changpeng.liu at intel.com> > > In commit 88c85538, "virtio-blk: add discard and write zeroes features > to specification" (https://github.com/oasis-tcs/virtio-spec), the virtio > block specification has been extended to add VIRTIO_BLK_T_DISCARD and > VIRTIO_BLK_T_WRITE_ZEROES commands. This patch enables support for > discar...

...support > > On Wed, Jun 06, 2018 at 12:19:00PM +0800, Changpeng Liu wrote: > > Existing virtio-blk protocol doesn't have DISCARD/WRITE ZEROES commands > > support, this will impact the performance when using SSD backend over > > file systems. > > > > Commit 88c85538 "virtio-blk: add discard and write zeroes features to > > specification"(see https://github.com/oasis-tcs/virtio-spec) extended > > existing virtio-blk protocol, adding extra DISCARD and WRITE ZEROES > > commands support. > > > > While here, using 16 bytes de...

...support > > On Wed, Jun 06, 2018 at 12:19:00PM +0800, Changpeng Liu wrote: > > Existing virtio-blk protocol doesn't have DISCARD/WRITE ZEROES commands > > support, this will impact the performance when using SSD backend over > > file systems. > > > > Commit 88c85538 "virtio-blk: add discard and write zeroes features to > > specification"(see https://github.com/oasis-tcs/virtio-spec) extended > > existing virtio-blk protocol, adding extra DISCARD and WRITE ZEROES > > commands support. > > > > While here, using 16 bytes de...

Existing virtio-blk protocol doesn't have DISCARD/WRITE ZEROES commands support, this will impact the performance when using SSD backend over file systems. Commit 88c85538 "virtio-blk: add discard and write zeroes features to specification"(see https://github.com/oasis-tcs/virtio-spec) extended existing virtio-blk protocol, adding extra DISCARD and WRITE ZEROES commands support. While here, using 16 bytes descriptor to describe one segment of DISCARD or WR...

Existing virtio-blk protocol doesn't have DISCARD/WRITE ZEROES commands support, this will impact the performance when using SSD backend over file systems. Commit 88c85538 "virtio-blk: add discard and write zeroes features to specification"(see https://github.com/oasis-tcs/virtio-spec) extended existing virtio-blk protocol, adding extra DISCARD and WRITE ZEROES commands support. While here, using 16 bytes descriptor to describe one segment of DISCARD or WR...

...00PM +0800, Changpeng Liu wrote: > > > > Existing virtio-blk protocol doesn't have DISCARD/WRITE ZEROES commands > > > > support, this will impact the performance when using SSD backend over > > > > file systems. > > > > > > > > Commit 88c85538 "virtio-blk: add discard and write zeroes features to > > > > specification"(see https://github.com/oasis-tcs/virtio-spec) extended > > > > existing virtio-blk protocol, adding extra DISCARD and WRITE ZEROES > > > > commands support. > > > >...

On Wed, Jun 06, 2018 at 12:19:00PM +0800, Changpeng Liu wrote: > Existing virtio-blk protocol doesn't have DISCARD/WRITE ZEROES commands > support, this will impact the performance when using SSD backend over > file systems. > > Commit 88c85538 "virtio-blk: add discard and write zeroes features to > specification"(see https://github.com/oasis-tcs/virtio-spec) extended > existing virtio-blk protocol, adding extra DISCARD and WRITE ZEROES > commands support. > > While here, using 16 bytes descriptor to describe one...

..., Changpeng > <changpeng.liu at intel.com> > Subject: Re: [PATCH v9] virtio_blk: add discard and write zeroes support > > On Thu, Nov 01, 2018 at 03:40:35PM -0700, Daniel Verkamp wrote: > > From: Changpeng Liu <changpeng.liu at intel.com> > > > > In commit 88c85538, "virtio-blk: add discard and write zeroes features > > to specification" (https://github.com/oasis-tcs/virtio-spec), the virtio > > block specification has been extended to add VIRTIO_BLK_T_DISCARD and > > VIRTIO_BLK_T_WRITE_ZEROES commands. This patch enables support...

On Mon, Oct 15, 2018 at 2:27 AM Christoph Hellwig <hch at infradead.org> wrote: > On Fri, Oct 12, 2018 at 02:06:28PM -0700, Daniel Verkamp wrote: > > From: Changpeng Liu <changpeng.liu at intel.com> > > > > In commit 88c85538, "virtio-blk: add discard and write zeroes features > > to specification" (https://github.com/oasis-tcs/virtio-spec), the virtio > > There is some issues in this spec. For one using the multiple ranges > also for write zeroes is rather inefficient. Write zeroes really sho...

...d, Jun 06, 2018 at 12:19:00PM +0800, Changpeng Liu wrote: > > > Existing virtio-blk protocol doesn't have DISCARD/WRITE ZEROES commands > > > support, this will impact the performance when using SSD backend over > > > file systems. > > > > > > Commit 88c85538 "virtio-blk: add discard and write zeroes features to > > > specification"(see https://github.com/oasis-tcs/virtio-spec) extended > > > existing virtio-blk protocol, adding extra DISCARD and WRITE ZEROES > > > commands support. > > > > > > Whil...

...Other than crosvm, is there any version of qemu (e.g., repositories developed in progress on github) where I can try with this feature? Thank you very much! Dongli Zhang On 11/02/2018 06:40 AM, Daniel Verkamp wrote: > From: Changpeng Liu <changpeng.liu at intel.com> > > In commit 88c85538, "virtio-blk: add discard and write zeroes features > to specification" (https://github.com/oasis-tcs/virtio-spec), the virtio > block specification has been extended to add VIRTIO_BLK_T_DISCARD and > VIRTIO_BLK_T_WRITE_ZEROES commands. This patch enables support for > discar...

From: Changpeng Liu <changpeng.liu at intel.com> In commit 88c85538, "virtio-blk: add discard and write zeroes features to specification" (https://github.com/oasis-tcs/virtio-spec), the virtio block specification has been extended to add VIRTIO_BLK_T_DISCARD and VIRTIO_BLK_T_WRITE_ZEROES commands. This patch enables support for discard and write zeroes i...

From: Changpeng Liu <changpeng.liu at intel.com> In commit 88c85538, "virtio-blk: add discard and write zeroes features to specification" (https://github.com/oasis-tcs/virtio-spec), the virtio block specification has been extended to add VIRTIO_BLK_T_DISCARD and VIRTIO_BLK_T_WRITE_ZEROES commands. This patch enables support for discard and write zeroes i...

Existing virtio-blk protocol doesn't have DISCARD/WRITE ZEROES commands support, this will impact the performance when using SSD backend over file systems. Commit 88c85538 "virtio-blk: add discard and write zeroes features to specification"(see https://github.com/oasis-tcs/virtio-spec) extended existing virtio-blk protocol, adding extra DISCARD and WRITE ZEROES commands support. While here, using 16 bytes descriptor to describe one segment of DISCARD or WR...

Existing virtio-blk protocol doesn't have DISCARD/WRITE ZEROES commands support, this will impact the performance when using SSD backend over file systems. Commit 88c85538 "virtio-blk: add discard and write zeroes features to specification"(see https://github.com/oasis-tcs/virtio-spec) extended existing virtio-blk protocol, adding extra DISCARD and WRITE ZEROES commands support. While here, using 16 bytes descriptor to describe one segment of DISCARD or WR...

Existing virtio-blk protocol doesn't have DISCARD/WRITE ZEROES commands support, this will impact the performance when using SSD backend over file systems. Commit 88c85538 "virtio-blk: add discard and write zeroes features to specification"(see https://github.com/oasis-tcs/virtio-spec) extended existing virtio-blk protocol, adding extra DISCARD and WRITE ZEROES commands support. While here, using 16 bytes descriptor to describe one segment of DISCARD or WR...

Existing virtio-blk protocol doesn't have DISCARD/WRITE ZEROES commands support, this will impact the performance when using SSD backend over file systems. Commit 88c85538 "virtio-blk: add discard and write zeroes features to specification"(see https://github.com/oasis-tcs/virtio-spec) extended existing virtio-blk protocol, adding extra DISCARD and WRITE ZEROES commands support. While here, using 16 bytes descriptor to describe one segment of DISCARD or WR...