[PATCH 50/75] perf tools: Add anonymous huge page recognition

From: Luis Henriques
Date: Wed Aug 14 2013 - 06:40:42 EST -stable review patch. If anyone has any objections, please let me know.


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

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

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@xxxxxx>
Cc: Akihiro Nagai <akihiro.nagai.hw@xxxxxxxxxxx>
Cc: Andi Kleen <andi@xxxxxxxxxxxxxx>
Cc: David Ahern <dsahern@xxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Joshua Zhu <zhu.wen-jie@xxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
Link: http://lkml.kernel.org/r/1357363797-3550-1-git-send-email-zhu.wen-jie@xxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Cc: Vinson Lee <vlee@xxxxxxxxxxxxxxx>
Signed-off-by: Luis Henriques <luis.henriques@xxxxxxxxxxxxx>
tools/perf/util/map.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index a1f4e36..81072b6 100644
--- 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)");

static inline int is_no_dso_memory(const char *filename)

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