Re: [PATCH v2] perf/core: install cgroup events to correct cpuctx

[Song Liu]

> On Mar 18, 2020, at 12:33 PM, Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
> 
> On Wed, Mar 18, 2020 at 07:05:35PM +0100, Peter Zijlstra wrote:
>> On Wed, Mar 18, 2020 at 07:07:29AM +0000, Song Liu wrote:
> 
>>> Could you please share your thoughts on this? I think we cannot use current
>>> in list_update_cgroup_event(), unless we call it on the target CPU. 
>> 
>> Bah, that cgroup crap is 'wrong'. It's pointless to track the
>> cpuctx->cgrp state for disabled events.
>> 
>> Let me see if I can unravel that crud.
> 
> This compiles, but I've no clue how to operate cgroups. Please test.

Thanks Peter! This fixes the issue I saw. And the code looks good too. 

Reviewed-and-tested-by: Song Liu <songliubraving@xxxxxx>

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