linux-kernel - [ 12/12] perf tools: Add anonymous huge page recognition

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Message-Id: <20130813063521.259105011@linuxfoundation.org>
Date:	Mon, 12 Aug 2013 23:35:47 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Joshua Zhu <zhu.wen-jie@...com>,
	Akihiro Nagai <akihiro.nagai.hw@...achi.com>,
	Andi Kleen <andi@...stfloor.org>,
	David Ahern <dsahern@...il.com>,
	Ingo Molnar <mingo@...hat.com>, Jiri Olsa <jolsa@...hat.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Vinson Lee <vlee@...edesktop.org>,
	Arnaldo Carvalho de Melo <acme@...hat.com>
Subject: [ 12/12] perf tools: Add anonymous huge page recognition

3.0-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Joshua Zhu <zhu.wen-jie@...com>

commit d0528b5d71faf612014dd7672e44225c915344b2 upstream.

Judging anonymous memory's vm_area_struct, perf_mmap_event's filename
will be set to "//anon" indicating this vma belongs to anonymous
memory.

Once hugepage is used, vma's vm_file points to hugetlbfs. In this way,
this vma will not be regarded as anonymous memory by is_anon_memory() in
perf user space utility.

Signed-off-by: Joshua Zhu <zhu.wen-jie@...com>
Cc: Akihiro Nagai <akihiro.nagai.hw@...achi.com>
Cc: Andi Kleen <andi@...stfloor.org>
Cc: David Ahern <dsahern@...il.com>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Joshua Zhu <zhu.wen-jie@...com>
Cc: Namhyung Kim <namhyung@...nel.org>
Cc: Paul Mackerras <paulus@...ba.org>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Vinson Lee <vlee@...edesktop.org>
Link: http://lkml.kernel.org/r/1357363797-3550-1-git-send-email-zhu.wen-jie@hp.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 tools/perf/util/map.c |    3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -15,7 +15,8 @@ const char *map_type__name[MAP__NR_TYPES
 
 static inline int is_anon_memory(const char *filename)
 {
-	return strcmp(filename, "//anon") == 0;
+	return !strcmp(filename, "//anon") ||
+	       !strcmp(filename, "/anon_hugepage (deleted)");
 }
 
 void map__init(struct map *self, enum map_type type,


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