linux-kernel - Re: [PATCH] virtio-blk: make the queue depth the max supportable by the hypervisor

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Message-ID: <CAJSP0QV_mf9D0t5ozWRRsMO1Wq7OTQ8SiOKh-HrW7buzNQQngQ@mail.gmail.com>
Date:	Tue, 1 Apr 2014 12:49:38 +0200
From:	Stefan Hajnoczi <stefanha@...il.com>
To:	"Theodore Ts'o" <tytso@....edu>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Venkatesh Srinivas <venkateshs@...gle.com>,
	Linux Kernel Developers List <linux-kernel@...r.kernel.org>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Linux Virtualization <virtualization@...ts.linux-foundation.org>
Subject: Re: [PATCH] virtio-blk: make the queue depth the max supportable by
 the hypervisor

On Tue, Apr 1, 2014 at 4:27 AM, Theodore Ts'o <tytso@....edu> wrote:
> On Mon, Mar 31, 2014 at 02:22:50PM +1030, Rusty Russell wrote:
>>
>> It's head of my virtio-next tree.
>
> Hey Rusty,
>
> While we have your attention --- what's your opinion about adding TRIM
> support to virtio-blk.  I understand that you're starting an OASIS
> standardization process for virtio --- what does that mean vis-a-vis a
> patch to plumb discard support through virtio-blk?

virtio-scsi already supports discard.  But maybe you cannot switch
away from virtio-blk?

If you need to add discard to virtio-blk then it could be added to the
standard.  The standards text is kept in a svn repository here:
https://tools.oasis-open.org/version-control/browse/wsvn/virtio/

Stefan
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