[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Qemu-devel] [PATCH v1 0/2] Reporting of rotation rate for disks

From: Paolo Bonzini
Subject: Re: [Qemu-devel] [PATCH v1 0/2] Reporting of rotation rate for disks
Date: Tue, 10 Oct 2017 12:18:39 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.3.0

On 04/10/2017 13:40, Daniel P. Berrange wrote:
> There is no mechanism to report this information to virtio-blk.
> We could perhaps argue that people should use virtio-scsi instead,
> because fixing virtio-blk would require enhancement to both QEMU
> and Linux virtio-blk drivers (and other guest OS drivers too)

I think long-term virtio-blk should only be used for high-performance
scenarios where the guest SCSI layer slows down things sensibly.  So
perhaps virtio-blk should always report itself as non-rotational.

> I'm unclear if there is anything I should have done wrt the
> device migration vmstate when adding this extra field, or if it
> is safe to just expect the mgmt app to set the property correctly
> on src+dst ?

That should be enough, yes.


reply via email to

[Prev in Thread] Current Thread [Next in Thread]