linux-kernel - [PATCH] Perf: add anonymous huge page recognition

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Message-Id: <1357363797-3550-1-git-send-email-zhu.wen-jie@hp.com>
Date:	Sat,  5 Jan 2013 13:29:57 +0800
From:	Joshua Zhu <zhu.wen-jie@...com>
To:	a.p.zijlstra@...llo.nl, paulus@...ba.org, mingo@...hat.com,
	acme@...stprotocols.net, namhyung@...nel.org, dsahern@...il.com,
	akihiro.nagai.hw@...achi.com, jolsa@...hat.com, andi@...stfloor.org
Cc:	zhu.wen-jie@...com, linux-kernel@...r.kernel.org
Subject: [PATCH] Perf: 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 is belong 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>
---
 tools/perf/util/map.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c
index 0328d45..ff94425 100644
--- 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)
-- 
1.7.0.4

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