Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753133AbaAMUwg (ORCPT ); Mon, 13 Jan 2014 15:52:36 -0500 Received: from merlin.infradead.org ([205.233.59.134]:40437 "EHLO merlin.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752131AbaAMUsK (ORCPT ); Mon, 13 Jan 2014 15:48:10 -0500 From: Arnaldo Carvalho de Melo To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Arnaldo Carvalho de Melo , Adrian Hunter , David Ahern , Frederic Weisbecker , Jiri Olsa , Mike Galbraith , Namhyung Kim , Paul Mackerras , Peter Zijlstra , Stephane Eranian Subject: [PATCH 21/38] perf report: Move logic to warn about kptr_restrict'ed kernels to separate function Date: Mon, 13 Jan 2014 17:47:22 -0300 Message-Id: <1389646059-24881-22-git-send-email-acme@infradead.org> X-Mailer: git-send-email 1.8.1.4 In-Reply-To: <1389646059-24881-1-git-send-email-acme@infradead.org> References: <1389646059-24881-1-git-send-email-acme@infradead.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: Arnaldo Carvalho de Melo Its too big, better have a separate function for it so that the main logic gets shorter/clearer. Cc: Adrian Hunter Cc: David Ahern Cc: Frederic Weisbecker Cc: Jiri Olsa Cc: Mike Galbraith Cc: Namhyung Kim Cc: Paul Mackerras Cc: Peter Zijlstra Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-ahh6vfzyh8fsygjwrsbroeu0@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-report.c | 56 ++++++++++++++++++++++++--------------------- 1 file changed, 30 insertions(+), 26 deletions(-) diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c index bf8dd2e893e4..f2ff8609e98e 100644 --- a/tools/perf/builtin-report.c +++ b/tools/perf/builtin-report.c @@ -412,14 +412,41 @@ static int perf_evlist__tty_browse_hists(struct perf_evlist *evlist, return 0; } +static void report__warn_kptr_restrict(const struct report *rep) +{ + struct map *kernel_map = rep->session->machines.host.vmlinux_maps[MAP__FUNCTION]; + struct kmap *kernel_kmap = map__kmap(kernel_map); + + if (kernel_map == NULL || + (kernel_map->dso->hit && + (kernel_kmap->ref_reloc_sym == NULL || + kernel_kmap->ref_reloc_sym->addr == 0))) { + const char *desc = + "As no suitable kallsyms nor vmlinux was found, kernel samples\n" + "can't be resolved."; + + if (kernel_map) { + const struct dso *kdso = kernel_map->dso; + if (!RB_EMPTY_ROOT(&kdso->symbols[MAP__FUNCTION])) { + desc = "If some relocation was applied (e.g. " + "kexec) symbols may be misresolved."; + } + } + + ui__warning( +"Kernel address maps (/proc/{kallsyms,modules}) were restricted.\n\n" +"Check /proc/sys/kernel/kptr_restrict before running 'perf record'.\n\n%s\n\n" +"Samples in kernel modules can't be resolved as well.\n\n", + desc); + } +} + static int __cmd_report(struct report *rep) { int ret = -EINVAL; u64 nr_samples; struct perf_session *session = rep->session; struct perf_evsel *pos; - struct map *kernel_map; - struct kmap *kernel_kmap; const char *help = "For a higher level overview, try: perf report --sort comm,dso"; struct ui_progress prog; struct perf_data_file *file = session->file; @@ -444,30 +471,7 @@ static int __cmd_report(struct report *rep) if (ret) return ret; - kernel_map = session->machines.host.vmlinux_maps[MAP__FUNCTION]; - kernel_kmap = map__kmap(kernel_map); - if (kernel_map == NULL || - (kernel_map->dso->hit && - (kernel_kmap->ref_reloc_sym == NULL || - kernel_kmap->ref_reloc_sym->addr == 0))) { - const char *desc = - "As no suitable kallsyms nor vmlinux was found, kernel samples\n" - "can't be resolved."; - - if (kernel_map) { - const struct dso *kdso = kernel_map->dso; - if (!RB_EMPTY_ROOT(&kdso->symbols[MAP__FUNCTION])) { - desc = "If some relocation was applied (e.g. " - "kexec) symbols may be misresolved."; - } - } - - ui__warning( -"Kernel address maps (/proc/{kallsyms,modules}) were restricted.\n\n" -"Check /proc/sys/kernel/kptr_restrict before running 'perf record'.\n\n%s\n\n" -"Samples in kernel modules can't be resolved as well.\n\n", - desc); - } + report__warn_kptr_restrict(rep); if (use_browser == 0) { if (verbose > 3) -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/