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Re: [Qemu-devel] [RFC v1] block/NVMe: introduce a new vhost NVMe host de
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From: |
Liu, Changpeng |
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Subject: |
Re: [Qemu-devel] [RFC v1] block/NVMe: introduce a new vhost NVMe host device to QEMU |
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Date: |
Wed, 24 Oct 2018 08:23:40 +0000 |
The latest thread for supporting DISCARD and WRITE ZEROES feature for
virtio-blk is here:
virtio_blk: add discard and write zeroes support
https://lists.linuxfoundation.org/pipermail/virtualization/2018-October/039534.html
I don't take further more steps about it, please go ahead and make the
specification more clear, thanks.
> -----Original Message-----
> From: Michael S. Tsirkin [mailto:address@hidden
> Sent: Wednesday, October 24, 2018 1:39 AM
> To: Paolo Bonzini <address@hidden>
> Cc: Liu, Changpeng <address@hidden>; address@hidden; Harris,
> James R <address@hidden>; Busch, Keith <address@hidden>;
> address@hidden; address@hidden; address@hidden
> Subject: Re: [RFC v1] block/NVMe: introduce a new vhost NVMe host device to
> QEMU
>
> On Tue, Jan 16, 2018 at 06:06:56PM +0100, Paolo Bonzini wrote:
> > Second, virtio-based vhost-user remains QEMU's preferred method for
> > high-performance I/O in guests. Discard support is missing and that is
> > important for SSDs; that should be fixed in the virtio spec.
>
> BTW could you reply on the thread of the patch
> virtio_blk: add discard and write zeroes support
>
> Christoph Hellwig thinks we should change the spec and defer
> implementation until we do. What's your take on this?
>
>
> --
> MST