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

Jeremy Fitzhardinge
2007-02-16T07:25:01Z

Andrew Morton wrote:
> On Thu, 15 Feb 2007 22:14:45 -0800 Dan Hecht <dhecht@vmware.com> 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