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=-2.3 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE, SPF_PASS,USER_AGENT_SANE_1 autolearn=no 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 59A5AC43603 for ; Wed, 4 Dec 2019 12:52:46 +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 2141020674 for ; Wed, 4 Dec 2019 12:52:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="dyfYXyTL" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2141020674 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:Date: Message-ID:From:References:To:Subject:Reply-To:Content-ID:Content-Description :Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=7zxcJdmjq8sTw95oGOK3FhdwfkhZpHfKPbDECfwDq8o=; b=dyfYXyTL+p3s+6 rxmqWWO6zQ8gL9sDZzBAu9brm6ThJSOHFWgurjS6hO7/JBaz5qArtZnWmePqf+Qd+1nyT/2bm/Bil iw2iGoKNADKGOxhRTk+t+QxFXcaCdJb519kX4pa/qZ0v4/uTdMIF7U1ICSmIxv1GZmDlhsVYeyN3P tYekH+2ZvgfuKsvbILwW14paHSBjqtU+Vwoc+GzQbb7jVuIoqehLsFGuT4QOXSTtKqrJZ9yrkHSMi M/9s2Oke5Ea3HtFgN4KZMMNEsCPnGGmzUrz6fyuWQjPWq0/cQfsNTe9IZyYcuNYYBl5a266hdVuDj z/wO6chPGyFFBdOB6WDg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1icU91-0007Hb-Nl; Wed, 04 Dec 2019 12:52:39 +0000 Received: from foss.arm.com ([217.140.110.172]) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1icU8z-0007H0-3Y for linux-arm-kernel@lists.infradead.org; Wed, 04 Dec 2019 12:52:38 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 038D31FB; Wed, 4 Dec 2019 04:52:36 -0800 (PST) Received: from [192.168.1.18] (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 4515A3F68E; Wed, 4 Dec 2019 04:52:35 -0800 (PST) Subject: Re: Kernel v5.2+ on HiKey960? To: Catalin Marinas , Jerome Forissier References: <20191204101851.GC13081@arrakis.emea.arm.com> From: Vincenzo Frascino Message-ID: Date: Wed, 4 Dec 2019 12:55:07 +0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: <20191204101851.GC13081@arrakis.emea.arm.com> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191204_045237_192412_22805CA3 X-CRM114-Status: GOOD ( 13.78 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "linux-arm-kernel@lists.infradead.org" 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 12/4/19 10:18 AM, Catalin Marinas wrote: >> 1. "arm64: vdso: Substitute gettimeofday() with C implementation" > Commit 28b1a824a4f4, merged in 5.3 > >> 2. "arm64: vdso: Explicitly add build-id option" > Commit 7a0a93c51799, merged in 5.2 > >> 3. "arm64: arch_timer: Ensure counter register reads occur with seqlock >> held" > Commit 75a19a0202db, merged in 5.2. > >> 4. "arm64: vdso: Remove stale files from old assembly implementation" > Commit 37a5076098c1, merged in 5.4. > > The above is a pretty random set of reverts that doesn't really help > pinpoint the issue. > > Since 5.2 was the first kernel where the regression was noticed, could > you try reverting commit 75a19a0202db in 5.2 and try that specific > kernel version? If this doesn't solve the issue, it may be simpler to > bisect only between 5.1 and 5.2 rather than across multiple kernel > versions. I agree with Catalin here. The unified vDSO change is a 5.3+ change, should not impact what you are seeing in 5.2. Could you please as well provide some guidelines to reproduce your scenario exactly? This would help in the debugging. -- Regards, Vincenzo _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel