linux-kernel - Re: [PATCH 3/5] perf tools: Reference count map

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Date:	Tue, 15 Apr 2014 12:17:22 -0600
From:	David Ahern <dsahern@...il.com>
To:	Jiri Olsa <jolsa@...hat.com>
CC:	linux-kernel@...r.kernel.org,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Adrian Hunter <adrian.hunter@...el.com>,
	Don Zickus <dzickus@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Mike Galbraith <efault@....de>,
	Namhyung Kim <namhyung@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 3/5] perf tools: Reference count map_groups objects

On 4/15/14, 3:56 AM, Jiri Olsa wrote:
>
> hum.. I think using atomic type is not enough, we'd need
> to make map_groups__put/get atomic as well
>
> not sure what's the support in user space for that.. will check
>
> also not to be negative, but libperf is not thread safe anyway, right? ;-)

should be. pretty certain there have been bug reports (e.g, perf-top) 
that stumble onto problems and they get fixed.

David

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