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

[Mathieu Desnoyers]

* Peter Zijlstra (peterz@xxxxxxxxxxxxx) wrote:
> On Wed, 2009-10-07 at 11:21 -0400, Christoph Lameter wrote:
> > On Wed, 7 Oct 2009, Mathieu Desnoyers wrote:
> > 
> > > You are already calling the scheduler when ending the _fast_ path. I
> > > don't see the problem with calling it when you end the slow path
> > > execution.
> > 
> > Well yes that gives rise to the thought of using
> > 
> > 	preempt_enable_no_sched()
> 
> NACK, delaying the reschedule is not an option

Even if only done with interrupt off, and check resched is called after
each irq enable following this critical section ? I'd like to understand
the reason behind your rejection for this specific case.

Thanks,

Mathieu

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Mathieu Desnoyers
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