Subject: Re: [this_cpu_xx V5 19/19] SLUB: Experimental new fastpath w/o
 interrupt disable
From: Peter Zijlstra <peterz@infradead.org>
To: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: cl@linux-foundation.org, akpm@linux-foundation.org,
       linux-kernel@vger.kernel.org, Pekka Enberg <penberg@cs.helsinki.fi>,
       Tejun Heo <tj@kernel.org>, Mel Gorman <mel@csn.ul.ie>, mingo@elte.hu
In-Reply-To: <20091007124628.GB27363@Krystal>
References: <20091006233654.815079668@gentwo.org>
	 <20091006233733.153341605@gentwo.org> <20091007025440.GB4664@Krystal>
	 <1254906707.26976.225.camel@twins>  <20091007124628.GB27363@Krystal>
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Date: Wed, 07 Oct 2009 15:01:00 +0200
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On Wed, 2009-10-07 at 08:46 -0400, Mathieu Desnoyers wrote:
> * local_irq_restore
>   -> the interrupt line is low. The scheduler won't be called. There is
>      no preempt_check_resched() call.

That would be an issue with all irq disable sections, so I don't think
this is actually true.

I tried to find the actual code, but frigging paravirt crap obfuscated
the code enough that I actually gave up.
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