From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759438AbcIHUsu (ORCPT ); Thu, 8 Sep 2016 16:48:50 -0400 Received: from merlin.infradead.org ([205.233.59.134]:36098 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757097AbcIHUqg (ORCPT ); Thu, 8 Sep 2016 16:46:36 -0400 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Wang Nan , He Kuang , Nilay Vaish , Zefan Li , Hou Pengyang , Arnaldo Carvalho de Melo Subject: [PATCH 06/12] perf tools: Recognize hugetlb mapping as anon mapping Date: Thu, 8 Sep 2016 17:46:15 -0300 Message-Id: <1473367581-5996-7-git-send-email-acme@kernel.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1473367581-5996-1-git-send-email-acme@kernel.org> References: <1473367581-5996-1-git-send-email-acme@kernel.org> X-SRS-Rewrite: SMTP reverse-path rewritten from by merlin.infradead.org. See http://www.infradead.org/rpr.html Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Wang Nan Hugetlbfs mapping should be recognized as anon mapping so user has a chance to create /tmp/perf-.map file for symbol resolving. This patch utilizes MAP_HUGETLB to identify hugetlb mapping. After this patch, if perf is started before a program starts using huge pages (so perf gets MMAP2 events from kernel), perf is able to recognize hugetlb mapping as anon mapping. Signed-off-by: Wang Nan Cc: He Kuang Cc: Nilay Vaish Cc: Zefan Li Link: http://lkml.kernel.org/r/1473137909-142064-2-git-send-email-wangnan0@huawei.com Signed-off-by: Hou Pengyang Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/map.c | 13 ++++++++++--- 1 file changed, 10 insertions(+), 3 deletions(-) diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c index 0c54adb07ae9..d51a1257973b 100644 --- a/tools/perf/util/map.c +++ b/tools/perf/util/map.c @@ -6,6 +6,7 @@ #include #include #include +#include #include "map.h" #include "thread.h" #include "strlist.h" @@ -24,9 +25,15 @@ const char *map_type__name[MAP__NR_TYPES] = { [MAP__VARIABLE] = "Variables", }; -static inline int is_anon_memory(const char *filename) +static inline int is_anon_memory(const char *filename, u32 flags) { - return !strcmp(filename, "//anon") || + u32 anon_flags = 0; + +#ifdef MAP_HUGETLB + anon_flags |= MAP_HUGETLB; +#endif + return flags & anon_flags || + !strcmp(filename, "//anon") || !strncmp(filename, "/dev/zero", sizeof("/dev/zero") - 1) || !strncmp(filename, "/anon_hugepage", sizeof("/anon_hugepage") - 1); } @@ -155,7 +162,7 @@ struct map *map__new(struct machine *machine, u64 start, u64 len, int anon, no_dso, vdso, android; android = is_android_lib(filename); - anon = is_anon_memory(filename); + anon = is_anon_memory(filename, flags); vdso = is_vdso_map(filename); no_dso = is_no_dso_memory(filename); -- 2.7.4