netdev - Re: [RFC PATCH 0/4] Implement multiqueue virtio-net

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Thu, 9 Sep 2010 18:49:26 +0530
From:	Krishna Kumar2 <krkumar2@...ibm.com>
To:	Arnd Bergmann <arnd@...db.de>
Cc:	anthony@...emonkey.ws, Avi Kivity <avi@...hat.com>,
	davem@...emloft.net, kvm@...r.kernel.org, mst@...hat.com,
	netdev@...r.kernel.org, rusty@...tcorp.com.au
Subject: Re: [RFC PATCH 0/4] Implement multiqueue virtio-net

Arnd Bergmann <arnd@...db.de> wrote on 09/09/2010 04:10:27 PM:

> > > Can you live migrate a new guest from new-qemu/new-kernel
> > > to old-qemu/old-kernel, new-qemu/old-kernel and old-qemu/new-kernel?
> > > If not, do we need to support all those cases?
> >
> > I have not tried this, though I added some minimal code in
> > virtio_net_load and virtio_net_save. I don't know what needs
> > to be done exactly at this time. I forgot to put this in the
> > "Next steps" list of things to do.
>
> I was mostly trying to find out if you think it should work
> or if there are specific reasons why it would not.
> E.g. when migrating to a machine that has an old qemu, the guest
> gets reduced to a single queue, but it's not clear to me how
> it can learn about this, or if it can get hidden by the outbound
> qemu.

I agree, I am also not sure how the old guest will handle this.
Sorry about my ignorance on migration :(

Regards,

- KK

--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html