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From: Alexey Budankov <alexey.budankov@linux.intel.com>
Subject: Re: [RFC][PATCH] perf: Rewrite enabled/running timekeeping
To: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>,
        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
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        linux-kernel <linux-kernel@vger.kernel.org>,
        Vince Weaver <vince@deater.net>, Thomas Gleixner <tglx@linutronix.de>
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Date: Mon, 11 Sep 2017 09:55:39 +0300
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Hi,
On 05.09.2017 14:19, Peter Zijlstra wrote:
> On Tue, Sep 05, 2017 at 01:17:39PM +0300, Alexey Budankov wrote:
>> However we can't completely get rid of whole tree iterations because of 
>> inheritance code on forks in perf_event_init_context() here:
> 
> Right, fork() / inherit needs to iterate the full thing, nothing to be
> done about that.
> 
> I'll go make proper patches for that timekeeping rewrite and then have a
> look at your patches.
> 

Is there any progress so far? The latest patch version is here: 

https://lkml.org/lkml/2017/9/8/118