Re: [PATCH] The idle notifier chain should be atomic

[Andi Kleen]

On Friday 24 February 2006 04:24, Alan Stern wrote:
 
> In do_IRQ() there's a call to exit_idle(), which calls __exit_idle(), 
> which runs the idle_notifier call chain.  Surely you're not saying that we 
> can do a down_read() in this pathway?

No, but not because it's in an interrupt but because sleeping in the idle
task is illegal.

> And actually the chain's type doesn't seem to make much difference, since
> at the moment there's nothing in the vanilla kernel that registers for the
> idle_notifier chain.

Will come eventually.

-Andi
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