From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 4B7A4C43381 for ; Tue, 12 Mar 2019 17:28:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 11B872054F for ; Tue, 12 Mar 2019 17:28:27 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1552411707; bh=ApzyuoMcf/6lTBeLx5KFM6bVaqyi7gAOqwwJx/+5KB4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=AXvofls51urMaIpd4+m02+a99cinPuvOraNVE+bkbXCMtZsx3jrTx6BcoTiScqZRY hsX+evx3OMOdg0bsz5vZ2bvdCsykkd9ErtLo90XauoXamMZr7NNsh/7JKzqBROELmr RbFOGH4C6CjrNkTrMbzKmabcQStHZBIjIBb+PtcU= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729856AbfCLR2Z (ORCPT ); Tue, 12 Mar 2019 13:28:25 -0400 Received: from mail.kernel.org ([198.145.29.99]:33438 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729109AbfCLRRc (ORCPT ); Tue, 12 Mar 2019 13:17:32 -0400 Received: from localhost (unknown [104.133.8.98]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id BC03F21741; Tue, 12 Mar 2019 17:17:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1552411051; bh=ApzyuoMcf/6lTBeLx5KFM6bVaqyi7gAOqwwJx/+5KB4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=I+HBTGI2u4yHbAnZ9ZB3xjK6+KA4qeBTjiV6LIkMyX/JOudjJyG9QKkjwb9zq9TIK kmiE2rgx5SSvAkQ2fyXl188HftMv2EmbAY59LDLp97a1kBHCSXOJ0Ohimr3KwW3icU 8WQwbJXH7pAVhYwVvNOUxxzo4gfVm74YGN2kvrdg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Stephane Eranian , Jiri Olsa , Andi Kleen , Kan Liang , Peter Zijlstra , Arnaldo Carvalho de Melo , Sasha Levin Subject: [PATCH 4.9 36/96] perf tools: Handle TOPOLOGY headers with no CPU Date: Tue, 12 Mar 2019 10:09:54 -0700 Message-Id: <20190312171037.228092067@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190312171034.530434962@linuxfoundation.org> References: <20190312171034.530434962@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.9-stable review patch. If anyone has any objections, please let me know. ------------------ [ Upstream commit 1497e804d1a6e2bd9107ddf64b0310449f4673eb ] This patch fixes an issue in cpumap.c when used with the TOPOLOGY header. In some configurations, some NUMA nodes may have no CPU (empty cpulist). Yet a cpumap map must be created otherwise perf abort with an error. This patch handles this case by creating a dummy map. Before: $ perf record -o - -e cycles noploop 2 | perf script -i - 0x6e8 [0x6c]: failed to process type: 80 After: $ perf record -o - -e cycles noploop 2 | perf script -i - noploop for 2 seconds Signed-off-by: Stephane Eranian Acked-by: Jiri Olsa Cc: Andi Kleen Cc: Kan Liang Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1547885559-1657-1-git-send-email-eranian@google.com Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Sasha Levin --- tools/perf/util/cpumap.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/tools/perf/util/cpumap.c b/tools/perf/util/cpumap.c index 2c0b52264a46..a625cb1500f9 100644 --- a/tools/perf/util/cpumap.c +++ b/tools/perf/util/cpumap.c @@ -129,7 +129,12 @@ struct cpu_map *cpu_map__new(const char *cpu_list) if (!cpu_list) return cpu_map__read_all_cpu_map(); - if (!isdigit(*cpu_list)) + /* + * must handle the case of empty cpumap to cover + * TOPOLOGY header for NUMA nodes with no CPU + * ( e.g., because of CPU hotplug) + */ + if (!isdigit(*cpu_list) && *cpu_list != '\0') goto out; while (isdigit(*cpu_list)) { @@ -176,8 +181,10 @@ struct cpu_map *cpu_map__new(const char *cpu_list) if (nr_cpus > 0) cpus = cpu_map__trim_new(nr_cpus, tmp_cpus); - else + else if (*cpu_list != '\0') cpus = cpu_map__default_new(); + else + cpus = cpu_map__dummy_new(); invalid: free(tmp_cpus); out: -- 2.19.1