Re: [this_cpu_xx V5 19/19] SLUB: Experimental new fastpath w/ointerrupt disable

[Christoph Lameter]

On Mon, 12 Oct 2009, Mathieu Desnoyers wrote:

> > If I just enable interrupts there then the preempt check will not be
> > done and we may miss a scheduling point.
> >
>
> That's why you should do:
>
> local_irq_save()
> preempt_enable_no_resched()
> ...
> local_irq_restore()
> preempt_check_resched()

What is the difference then to

local_irq_save()

...

local_irq_enable();
preempt_enable();

?
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