[Xen-devel] Re: [patch 14/21] Xen-paravirt: Add XEN config options and disable unsupported config options.

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

Andrew Morton wrote:
> On Thu, 15 Feb 2007 22:14:45 -0800 Dan Hecht <dhecht@xxxxxxxxxx> wrote:
>
>   
>>>  config PREEMPT
>>>     bool "Preemptible Kernel (Low-Latency Desktop)"
>>> +   depends on !XEN
>>>     help
>>>       This option reduces the latency of the kernel by making
>>>       all kernel code (that is not executing in a critical section)
>>>
>>>       
>
> Oh, so that's why it doesn't break when CONFIG_PREEMPT=y.  In which case
> that preempt_disable() I spotted is wrong-and-unneeded.
>
> Why doesn't Xen work with preemption??
>   

I've forgotten the details.  Ian?  Keir?  Steven?  Maybe it can be done.

    J

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