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RE: [Xen-devel] Ideas for PV on SeaBIOS

from [Ian Campbell]

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To:	James Harper <james.harper@xxxxxxxxxxxxxxxx>
Subject:	RE: [Xen-devel] Ideas for PV on SeaBIOS
From:	Ian Campbell <Ian.Campbell@xxxxxxxxxxxxx>
Date:	Mon, 23 May 2011 10:23:24 +0100
Cc:	Paolo Bonzini <pbonzini@xxxxxxxxxx>, Daniel Castro <evil.dani@xxxxxxxxx>, Keir Fraser <keir.xen@xxxxxxxxx>, "seabios@xxxxxxxxxxx" <seabios@xxxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>
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On Sat, 2011-05-21 at 09:44 +0100, James Harper wrote:
> Am I understanding right that the OS would need to be completely put on
> hold in the middle of the hypercall while the BIOS took over and did
> it's shutdown sequence, which presumably involves xenstore activity?

Correct, or at least that is one suggestion (probably the front runner
at the moment).

In theory it's no worse than SMM, which Windows presumably already copes
with, but perhaps the latency from having to do the xenstore interaction
is far greater than any real SMM operation.

Ian.

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[Xen-devel] Ideas for PV on SeaBIOS, Daniel Castro Re: [Xen-devel] Ideas for PV on SeaBIOS, Keir Fraser Re: [Xen-devel] Ideas for PV on SeaBIOS, Ian Campbell Re: [Xen-devel] Ideas for PV on SeaBIOS, Paolo Bonzini RE: [Xen-devel] Ideas for PV on SeaBIOS, James Harper RE: [Xen-devel] Ideas for PV on SeaBIOS, Ian Campbell <= RE: [Xen-devel] Ideas for PV on SeaBIOS, James Harper RE: [Xen-devel] Ideas for PV on SeaBIOS, Ian Campbell RE: [Xen-devel] Ideas for PV on SeaBIOS, James Harper Re: [Xen-devel] Ideas for PV on SeaBIOS, Jan Beulich Re: [Xen-devel] Ideas for PV on SeaBIOS, Juergen Gross Re: [Xen-devel] Ideas for PV on SeaBIOS, Tim Deegan Re: [Xen-devel] Ideas for PV on SeaBIOS, Ian Campbell Re: [Xen-devel] Ideas for PV on SeaBIOS, Keir Fraser Re: [Xen-devel] Ideas for PV on SeaBIOS - flush/barrier in QEMU, Konrad Rzeszutek Wilk RE: [Xen-devel] Ideas for PV on SeaBIOS, James Harper

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