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[PATCH 02/13] perf top: Fix freeze on --call-graph flat/folded

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From: Namhyung Kim <namhyung@kernel.org>

The callchain rbtree is rebuilt periodically, so it needs to
reinitialize the root everytime.  Otherwise it can be stuck in the
rbtree insertion with stale pointers.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1448521700-32062-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
---
 tools/perf/util/callchain.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/perf/util/callchain.c b/tools/perf/util/callchain.c
index fc3b1e0d09ee..564377d2bebf 100644
--- a/tools/perf/util/callchain.c
+++ b/tools/perf/util/callchain.c
@@ -290,6 +290,7 @@ static void
 sort_chain_flat(struct rb_root *rb_root, struct callchain_root *root,
 		u64 min_hit, struct callchain_param *param __maybe_unused)
 {
+	*rb_root = RB_ROOT;
 	__sort_chain_flat(rb_root, &root->node, min_hit);
 }
 
-- 
2.1.0

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[GIT PULL 00/13] perf/core improvements and fixes Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-26 21:50 +0100
  [PATCH 07/13] perf script: Pass perf_script into process_event Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-26 21:50 +0100
  [PATCH 09/13] perf symbols: Refactor vmlinux_path__init() to ease path additions Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-26 21:50 +0100
  [PATCH 03/13] perf script: Remove default_scripting_ops Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-26 21:50 +0100
  [PATCH 04/13] perf build: Fix traceevent plugins build race Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-26 21:50 +0100
  [PATCH 10/13] perf symbols: Add the path to vmlinux.debug Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-26 21:50 +0100
  [PATCH 01/13] perf callchain: Honor hide_unresolved Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-26 21:50 +0100
  [PATCH 06/13] perf tools: Correctly identify anon_hugepage when generating map (v2) Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-26 21:50 +0100
  [PATCH 02/13] perf top: Fix freeze on --call-graph flat/folded Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-26 21:50 +0100
  [PATCH 05/13] perf machine: Adjust dso->long_name for offline module Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-26 21:50 +0100
  [PATCH 11/13] perf stat: Clear sample_(type|period) for counting Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-26 21:50 +0100
  [PATCH 08/13] tools build: Use fixdep with OUTPUT path prefix Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-11-26 21:50 +0100
  Re: [GIT PULL 00/13] perf/core improvements and fixes Ingo Molnar <mingo@kernel.org> - 2015-11-27 08:40 +0100

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