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SubjectRe: [RFC PATCH 08/17] perf: Allow inheritance for detached events
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Peter Zijlstra <peterz@infradead.org> writes:

> On Tue, Sep 05, 2017 at 04:30:17PM +0300, Alexander Shishkin wrote:
>> This enables inheritance for detached events. Unlike traditional events,
>> these do not have parents: inheritance produces a new independent event
>> with the same attribute. If the 'parent' event has a ring buffer, so will
>> the new event. Considering the mlock accounting, this buffer allocation
>> may fail, which in turn will fail the parent's fork, something to be
>> aware of.
>>
>> This also effectively disables context cloning, because unlike the
>> traditional events, these will each have its own ring buffer and
>> context switch optimization can't work.
>
> Right, so this thing is icky... as you know. More naming issues though,
> what will you go and call those files.

Yes. The failing-the-fork ickiness is dealt with later on in 11/17.
But true about the naming.

Regards,
--
Alex

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