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xen-devel
[Xen-devel] Re: [patch 14/21] Xen-paravirt: Add XEN config options and d
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To: |
Zachary Amsden <zach@xxxxxxxxxx> |
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Subject: |
[Xen-devel] Re: [patch 14/21] Xen-paravirt: Add XEN config options and disable unsupported config options. |
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From: |
ebiederm@xxxxxxxxxxxx (Eric W. Biederman) |
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Date: |
Fri, 16 Feb 2007 00:33:58 -0700 |
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Cc: |
Jeremy Fitzhardinge <jeremy@xxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, Ian Pratt <ian.pratt@xxxxxxxxxxxxx>, Andi Kleen <ak@xxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, Avi Kivity <avi@xxxxxxxxxxxx>, Chris Wright <chrisw@xxxxxxxxxxxx>, virtualization@xxxxxxxxxxxxxx, Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>, Christian Limpach <Christian.Limpach@xxxxxxxxxxxx> |
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Fri, 16 Feb 2007 05:35:30 -0800 |
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<45D54BFF.80100@xxxxxxxxxx> (Zachary Amsden's message of "Thu, 15 Feb 2007 22:15:27 -0800") |
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Zachary Amsden <zach@xxxxxxxxxx> writes:
>
> We do support different HZ values, although 100HZ is actually preferable for
> us,
> so I don't object to that. PREEMPT is supported by us, but not as tested as I
> would like, so I also don't object to dropping it for generic paravirt guests
> -
> Rusty - Avi any objections to dropping preempt in terms of lguest/KVM
> paravirtualization?
>
> Paravirt-ops definitely needs a hook for kexec, although we should not disable
> kexec for the natively booted paravirt-ops. Eric - is there a way to disable
> it
> at runtime?
>
> We do support the doublefault task gate, and it would be good to keep it, but
> I
> can't complain so much if it is gone from generic paravirt kernels for now,
> because it is non-essential, and generally fatal anyway. We do need it for
> native boots of paravirt-ops kernels, however, so turning off the config
> option
> still needs to be revisited
Have machine_kexec_prepare fail.
I think your machine description or paravirt_ops or whatever it is needs
to hook both machine_kexec_prepare and machine_kexec.
I know there actually has been some work to get kexec actually working under
Xen but I don't know where that has gone.
Eric
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