[Xen-devel] Re: preempt_disable() imbalance in take_machine_down

>>> On 05.04.11 at 15:59, Laszlo Ersek <lersek@xxxxxxxxxx> wrote:
> Looking at take_machine_down() and __xen_suspend() in 
> "drivers/xen/core/machine_reboot.c", assuming "fast_suspend" is false, 
> it seems that after the loop in take_machine_down() completes, 
> preempt_enable() is never called. Is this intentional?

Probably not.

> If so, how/why does it work?

Because PREEMPT depends on !XEN in kernel/Kconfig.preempt.

Jan


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