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=-2.5 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,T_DKIMWL_WL_HIGH, USER_AGENT_MUTT 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 00F11C07E85 for ; Fri, 7 Dec 2018 17:42:58 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id C3EDE20838 for ; Fri, 7 Dec 2018 17:42:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="OQf0cHWR" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C3EDE20838 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=1j9u4YD52z7tJPKcCI8ZN/6B+c440W+0qDEla9Jl0gk=; b=OQf0cHWRkVd7KN qIncdLpARo0qYAE+CuBMrOosIRlsPha8vHP5j1RjBcpX+QYEyXU8SPJv40lmzHWd1ReYxdmetNKof VQ9J5sRcRSvETIjgb/XI3ncxSVa3V+FXLO9st7Mvk9jHNqFIs/qU0cks/UnQ0JWJVeA3JJTO7k6dr JKZBv0yjH9xgQRgHB0tcwroAC5Ut86aMEUqz+WjUtxBCbbvSguOiHebltjPtko4iFzLH9/25b3tUY bg/z3Vw/OPaAy1UeVfwTnMBXKT4piOGuJjpkC+P5afKrVkMte0ZNT9Htq0heMWVWuAWPYf7LVTLmp LAwG3v6zUtPghHxX89pQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gVK9N-0006S4-Lp; Fri, 07 Dec 2018 17:42:53 +0000 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70] helo=foss.arm.com) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gVK9K-0006Qq-Mk; Fri, 07 Dec 2018 17:42:51 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 51E77EBD; Fri, 7 Dec 2018 09:42:40 -0800 (PST) Received: from arrakis.emea.arm.com (arrakis.cambridge.arm.com [10.1.196.113]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id BCE943F5AF; Fri, 7 Dec 2018 09:42:34 -0800 (PST) Date: Fri, 7 Dec 2018 17:42:32 +0000 From: Catalin Marinas To: Douglas Anderson Subject: Re: [REPOST PATCH v6 0/4] kgdb: Fix kgdb_roundup_cpus() Message-ID: <20181207174231.GD11961@arrakis.emea.arm.com> References: <20181205033828.6156-1-dianders@chromium.org> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20181205033828.6156-1-dianders@chromium.org> User-Agent: Mutt/1.10.1 (2018-07-13) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20181207_094250_745146_E124F7C7 X-CRM114-Status: GOOD ( 10.84 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Michal Hocko , Benjamin Herrenschmidt , linux-sh@vger.kernel.org, Peter Zijlstra , kgdb-bugreport@lists.sourceforge.net, Will Deacon , linux-kernel@vger.kernel.org, Rich Felker , Paul Mackerras , Michael Ellerman , "H. Peter Anvin" , sparclinux@vger.kernel.org, Daniel Thompson , Yoshinori Sato , linux-hexagon@vger.kernel.org, x86@kernel.org, Russell King , Ingo Molnar , Huang Ying , James Hogan , linux-snps-arc@lists.infradead.org, Mike Rapoport , Borislav Petkov , Thomas Gleixner , linux-arm-kernel@lists.infradead.org, Christophe Leroy , Vineet Gupta , linux-mips@vger.kernel.org, Ralf Baechle , Richard Kuo , Paul Burton , Jason Wessel , Andrew Morton , linuxppc-dev@lists.ozlabs.org, "David S. Miller" Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Dec 04, 2018 at 07:38:24PM -0800, Douglas Anderson wrote: > Douglas Anderson (4): > kgdb: Remove irq flags from roundup > kgdb: Fix kgdb_roundup_cpus() for arches who used smp_call_function() > kgdb: Don't round up a CPU that failed rounding up before > kdb: Don't back trace on a cpu that didn't round up FWIW, trying these on arm64 (ThunderX2) with CONFIG_KGDB_TESTS_ON_BOOT=y on top of 4.20-rc5 doesn't boot. It looks like they leave interrupts disabled when they shouldn't and it trips over the BUG at mm/vmalloc.c:1380 (called via do_fork -> copy_process). Now, I don't think these patches make things worse on arm64 since prior to them the kgdb boot tests on arm64 were stuck in a loop (RUN singlestep). -- Catalin _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel