linux-kernel - Re: [PATCH 10/10] perf tools: Move TUI-specific fields out of map

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Date:	Tue, 5 May 2015 10:12:45 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:	Ingo Molnar <mingo@...nel.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Jiri Olsa <jolsa@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	David Ahern <dsahern@...il.com>
Subject: Re: [PATCH 10/10] perf tools: Move TUI-specific fields out of
 map_symbol

Hi Arnaldo,

On Mon, May 04, 2015 at 12:51:16PM -0300, Arnaldo Carvalho de Melo wrote:
> Em Mon, May 04, 2015 at 12:42:27PM -0300, Arnaldo Carvalho de Melo escreveu:
> > Em Wed, Apr 22, 2015 at 04:18:21PM +0900, Namhyung Kim escreveu:
> > > The has_children and unfolded fields don't belong to struct map_symbol
> > > since they're used by TUI only.  Move those fields out of map_symbol
> > > since the struct is also used by other places.
> 
> > > This will also help to compact the sizeof struct hist_entry.
> 
> > 7ee14d744acb33e5b3114484d7d850caecb339a2 is the first bad commit
> > Author: Namhyung Kim <namhyung@...nel.org>
> > Date:   Wed Apr 22 16:18:21 2015 +0900
>  
> >     perf tools: Move TUI-specific fields out of map_symbol
>  
> > So I am moving this series to the top of perf/core and then moving it to a
> > separate branch, so that you can try to reproduce this and I can push the rest
> > to Ingo, ok?
> 
> Moved to perf/core-hists_browser
>  
> > Ah, while trying to find new_slab() in callchains one other thing I tried was
> > to press 'E', to expand all the callchains, and it segfaulted, unsure if this
> > is related.
> 
> It is related to this patchset, without it, I can press 'E' to expand
> all callchains and then 'C' to collapse them all as usual.

I tested and reproduced it.  There's a recursion by mistake during
refactoring.  The fix is below, I'll send v2.

Thanks,
Namhyung


diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index f422e5e82a6a..7a70493e938c 100644
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -361,7 +361,7 @@ static int callchain__set_folding(struct rb_root *chain, bool unfold)
 static void hist_entry__set_folding(struct hist_entry *he, bool unfold)
 {
 	hist_entry__init_have_children(he);
-	hist_entry__set_folding(he, unfold);
+	he->unfolded = unfold ? he->has_children : false;
 
 	if (he->has_children) {
 		int n = callchain__set_folding(&he->sorted_chain, unfold);
--
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