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SubjectRe: [this_cpu_xx V5 19/19] SLUB: Experimental new fastpath w/o interrupt disable
* Peter Zijlstra (peterz@infradead.org) 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

--
Mathieu Desnoyers
OpenPGP key fingerprint: 8CD5 52C3 8E3C 4140 715F BA06 3F25 A8FE 3BAE 9A68


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