linux-kernel - RE: [PATCH] perf tools: ignore zombie process for user profile

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Date:   Wed, 14 Dec 2016 19:19:51 +0000
From:   "Liang, Kan" <kan.liang@...el.com>
To:     "acme@...nel.org" <acme@...nel.org>
CC:     Jiri Olsa <jolsa@...hat.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "jolsa@...nel.org" <jolsa@...nel.org>,
        "Hunter, Adrian" <adrian.hunter@...el.com>,
        "andi@...stfloor.org" <andi@...stfloor.org>
Subject: RE: [PATCH] perf tools: ignore zombie process for user profile



.
> Em Wed, Dec 14, 2016 at 06:26:02PM +0000, Liang, Kan escreveu:
> > > On Wed, Dec 14, 2016 at 12:48:05PM -0500, kan.liang@...el.com wrote:
> > > > From: Kan Liang <kan.liang@...el.com> Zombie process is dead
> > > > process. It is meaningless to profile it.
> > > > It's better to ignore it for user profile.
> 
> > > I recently posted different patch for same issue:
> > >   http://marc.info/?l=linux-kernel&m=148153895827359&w=2
> 
> > The change as below make me confuse.
> > +	/* The system wide setup does not work with threads. */
> > +	if (!evsel->system_wide)
> > +		return false;
> > It looks the meaning of the comments is inconsistent with the code.
> 
> > Your original patch doesn't work well with the issue.
> > But if I change the above code as below, the issue is fixed.
> > 	if (evsel->system_wide)
> > 		return false;
> 
> yeah, Namhyung noticed that, Jiri sent a fixed patch, I have it already in my
> perf/core branch.
> 

That's great. Then Jiri's patch would work on my case.
Please ignore this patch.

Thanks,
Kan