perf tools: Add anonymous huge page recognition

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 <[email protected]>
Cc: Akihiro Nagai <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Jiri Olsa <[email protected]>
Cc: Joshua Zhu <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Arnaldo Carvalho de Melo <[email protected]>

diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index 0328d45c4f2af4571785812b32b94bd692ad36e1..ff94425779a2b291b6d2ea19600f19f34de815e6 100644 (file)
--- a/tools/perf/util/map.c
+++ b/tools/perf/util/map.c
@@ -19,7 +19,8 @@ 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)