Re: [PATCH 11/11] perf/x86/intel: Perform rotation on Intel CQM RMIDs

[Thomas Gleixner]

On Wed, 8 Oct 2014, Peter Zijlstra wrote:
> On Wed, Sep 24, 2014 at 03:04:15PM +0100, Matt Fleming wrote:
> > +	preempt_disable();

< SNIP loooong code >

> > +	preempt_enable();
> 
> Why is all that under preempt_disable()?

To make life harder for people who care about latencies and
deterministic behaviour perhaps?

Thanks,

	tglx


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