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Re: [Qemu-block] [PATCH V2 3/5] virtio-blk: disable scsi passthrough by
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-block] [PATCH V2 3/5] virtio-blk: disable scsi passthrough by default |
Date: |
Wed, 15 Jul 2015 17:14:20 +0300 |
On Wed, Jul 15, 2015 at 02:47:24PM +0200, Paolo Bonzini wrote:
>
>
> On 15/07/2015 14:21, Michael S. Tsirkin wrote:
> >> > Disable scsi passthrough by default since it was incompatible with
> >> > virtio 1.0. For legacy machine types, keep this on by default.
> >> >
> >> > Cc: Stefan Hajnoczi <address@hidden>
> >> > Cc: Kevin Wolf <address@hidden>
> >> > Cc: address@hidden
> >> > Signed-off-by: Jason Wang <address@hidden>
> > Seems risky for 2.4. modern is off by default for now. Can't we limit
> > the change to when modern is enabled?
>
> That would have the effect of disabling a feature when you turn on modern.
What's wrong with that?
> > I suggested changing this from bool to on/off/auto, and
> > make auto mean !modern.
>
> No, please do it like Jason did. The SCSI feature effectively had to be
> enabled explicitly already, the requests were marked as unsupported.
>
> Paolo
I didn't know. How is it enabled?
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MST