From mboxrd@z Thu Jan 1 00:00:00 1970 From: Arnaldo Carvalho de Melo Subject: [PATCH 63/83] perf top: Ignore kptr_restrict when not sampling the kernel Date: Fri, 17 Nov 2017 17:15:41 -0300 Message-ID: <20171117201601.24110-64-acme@kernel.org> References: <20171117201601.24110-1-acme@kernel.org> Return-path: Received: from mail.kernel.org ([198.145.29.99]:58960 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760105AbdKQUTl (ORCPT ); Fri, 17 Nov 2017 15:19:41 -0500 In-Reply-To: <20171117201601.24110-1-acme@kernel.org> Sender: linux-perf-users-owner@vger.kernel.org List-ID: To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, linux-perf-users@vger.kernel.org, Arnaldo Carvalho de Melo , Adrian Hunter , David Ahern , Jiri Olsa , Linus Torvalds , Namhyung Kim , Wang Nan From: Arnaldo Carvalho de Melo If all events have attr.exclude_kernel set, no need to look at kptr_restrict. Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Linus Torvalds Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-yegpzg5bf2im69g0tfizqaqz@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-top.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c index 68320ac5e9b0..865191281591 100644 --- a/tools/perf/builtin-top.c +++ b/tools/perf/builtin-top.c @@ -735,14 +735,16 @@ static void perf_event__process_sample(struct perf_tool *tool, if (!machine->kptr_restrict_warned && symbol_conf.kptr_restrict && al.cpumode == PERF_RECORD_MISC_KERNEL) { - ui__warning( + if (!perf_evlist__exclude_kernel(top->session->evlist)) { + ui__warning( "Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n" "Check /proc/sys/kernel/kptr_restrict.\n\n" "Kernel%s samples will not be resolved.\n", al.map && !RB_EMPTY_ROOT(&al.map->dso->symbols[MAP__FUNCTION]) ? " modules" : ""); - if (use_browser <= 0) - sleep(5); + if (use_browser <= 0) + sleep(5); + } machine->kptr_restrict_warned = true; } -- 2.13.6