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SubjectRe: [RFC PATCH 1/2] perf_events: add support for per-cpu per-cgroup monitoring (v2)
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On Wed, Sep 8, 2010 at 3:57 PM, Peter Zijlstra <peterz@infradead.org> wrote:
> On Wed, 2010-09-08 at 15:56 +0200, stephane eranian wrote:
>> On Wed, Sep 8, 2010 at 3:52 PM, Peter Zijlstra <peterz@infradead.org> wrote:
>> > On Wed, 2010-09-08 at 15:30 +0200, Stephane Eranian wrote:
>> >> +       } times[NR_CPUS] ____cacheline_aligned_in_smp;
>> >
>> > That's fail! NR_CPUS can be like 4k for distro configs.
>> >
>> How do you do this on struct that are dynamically allocated?
>> The number of css is dynamic.
>
> alloc_percpu()?
>
Ok, I will look into this. Thanks.
Clearly we can kmalloc() the array. But it would be nicer to have one
struct allocated per-cpu (avoid the cacheline_aligned_in_smp stuff).
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