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=-1.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS autolearn=ham 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 12CC1C46465 for ; Tue, 6 Nov 2018 04:06:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CE72A20862 for ; Tue, 6 Nov 2018 04:06:04 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CE72A20862 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=davemloft.net Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729795AbeKFN0d (ORCPT ); Tue, 6 Nov 2018 08:26:33 -0500 Received: from shards.monkeyblade.net ([23.128.96.9]:39312 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728971AbeKFN0d (ORCPT ); Tue, 6 Nov 2018 08:26:33 -0500 Received: from localhost (unknown [IPv6:2601:601:9f80:35cd::cf9]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) (Authenticated sender: davem-davemloft) by shards.monkeyblade.net (Postfix) with ESMTPSA id 1E1B314920CDE; Mon, 5 Nov 2018 20:03:22 -0800 (PST) Date: Mon, 05 Nov 2018 20:03:21 -0800 (PST) Message-Id: <20181105.200321.1569039579935458312.davem@davemloft.net> To: jolsa@redhat.com Cc: acme@kernel.org, linux-kernel@vger.kernel.org, namhyung@kernel.org, jolsa@kernel.org Subject: Re: [PATCH RFC] hist lookups From: David Miller In-Reply-To: <20181105.194542.476367332910923203.davem@davemloft.net> References: <20181104.165039.878682622135788379.davem@davemloft.net> <20181105203447.GA25674@krava> <20181105.194542.476367332910923203.davem@davemloft.net> X-Mailer: Mew version 6.8 on Emacs 26.1 Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Mon, 05 Nov 2018 20:03:22 -0800 (PST) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: David Miller Date: Mon, 05 Nov 2018 19:45:42 -0800 (PST) > Build fix for sparc below, I'm playing with this now. I get various assertion failures and crashes during make -j128 kernel builds on my sparc64 box: ==================== perf: Segmentation fault -------- backtrace -------- /lib/sparc-linux-gnu/libc.so.6(+0x38918)[0xf7264918] ./perf(thread__set_namespaces+0x30)[0x10b2f0] ./perf(machine__process_namespaces_event+0x134)[0xfad54] ./perf[0x517b8] ./perf(queued_events__flush+0xc8)[0x109288] ./perf[0x5133c] /lib/sparc-linux-gnu/libpthread.so.0(+0x6714)[0xf7c7e714] /lib/sparc-linux-gnu/libc.so.6(+0xf70b4)[0xf73230b4] /lib/sparc-linux-gnu/libpthread.so.0(+0x6a84)[0xf7c7ea84] davem@patience:~/src/GIT/sparc/tools/perf$ ==================== and: ==================== perf: /home/davem/src/GIT/sparc/tools/include/linux/refcount.h:131: refcount_sub_and_test: Assertion `!(new > val)' failed. ==================== I don't have a lot of time to try and debug this, but let me know if you want any fixes tested. I did look at the changes and I like what you're trying to do.