From patchwork Fri Sep 2 13:59:45 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wang Nan X-Patchwork-Id: 75304 Delivered-To: patch@linaro.org Received: by 10.140.29.8 with SMTP id a8csp887527qga; Fri, 2 Sep 2016 07:00:25 -0700 (PDT) X-Received: by 10.98.149.131 with SMTP id c3mr37065655pfk.73.1472824825319; Fri, 02 Sep 2016 07:00:25 -0700 (PDT) Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id c5si11690084paf.138.2016.09.02.07.00.23; Fri, 02 Sep 2016 07:00:25 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754031AbcIBOAV (ORCPT + 27 others); Fri, 2 Sep 2016 10:00:21 -0400 Received: from szxga03-in.huawei.com ([119.145.14.66]:42677 "EHLO szxga03-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751680AbcIBOAS (ORCPT ); Fri, 2 Sep 2016 10:00:18 -0400 Received: from 172.24.1.60 (EHLO szxeml430-hub.china.huawei.com) ([172.24.1.60]) by szxrg03-dlp.huawei.com (MOS 4.4.3-GA FastPath queued) with ESMTP id CHG03741; Fri, 02 Sep 2016 22:00:05 +0800 (CST) Received: from linux-4hy3.site (10.107.193.248) by szxeml430-hub.china.huawei.com (10.82.67.185) with Microsoft SMTP Server id 14.3.235.1; Fri, 2 Sep 2016 21:59:54 +0800 From: Wang Nan To: CC: , , Wang Nan , Hou Pengyang , He Kuang , Arnaldo Carvalho de Melo Subject: [PATCH 1/3] perf tools: Recognize hugetlb mapping as anon mapping Date: Fri, 2 Sep 2016 13:59:45 +0000 Message-ID: <1472824787-107939-2-git-send-email-wangnan0@huawei.com> X-Mailer: git-send-email 1.8.3.4 In-Reply-To: <1472824787-107939-1-git-send-email-wangnan0@huawei.com> References: <1472824787-107939-1-git-send-email-wangnan0@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.107.193.248] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A020204.57C985E5.0331, ss=1, re=0.000, recu=0.000, reip=0.000, cl=1, cld=1, fgs=0, ip=0.0.0.0, so=2013-05-26 15:14:31, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 6b1178e10ddbf34073b328d37c4b976a Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 the program uses huge pages starting, perf is able to recognize hugetlb mapping as anon mapping. Signed-off-by: Wang Nan Signed-off-by: Hou Pengyang Cc: He Kuang Cc: Arnaldo Carvalho de Melo --- tools/perf/util/map.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) -- 1.8.3.4 diff --git a/tools/perf/util/map.c b/tools/perf/util/map.c index 728129a..a42010d 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 +25,10 @@ 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") || + return flags & MAP_HUGETLB || + !strcmp(filename, "//anon") || !strncmp(filename, "/dev/zero", sizeof("/dev/zero") - 1) || !strncmp(filename, "/anon_hugepage", sizeof("/anon_hugepage") - 1); } @@ -155,7 +157,7 @@ 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);