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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id E6DA5C3DA4A for ; Fri, 9 Aug 2024 13:52:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=47NW2XTBLKy+JoGemROVoOjIno1OsPS387sub0zUsJQ=; b=fBPpElB7WieC/gabP+xGNO8eER Bam6lNz+XlxmlQfB1lVUTPeILS+YMP94hN3rdaQafFbIhhjI/dT8pGgxufbcRJ4wG6hMwohwuD6oj 6XkkatBjSDMa/iaZoaraNeH2wD6QlOCn7oDcxGgxn+n2HshxywpArbdeOvJcFJfMrUkDFvBLaVxNN eUwesLMYN9rCoD+MEvjxObWW9Z20/SDrKMjzZo8wY/aUyxjDxYuwTAxEFlcOBWN/2HVG0M9uiBIO9 Qkh6ih0XGJsgvKLYohjiBM+Yrq7c0Kn7vz4YMXHOU6poKcOPuUPg1dvarQmkFDwC45zR/ozFfy5+B cd4LBqrA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1scQ27-0000000BPUS-43m3; Fri, 09 Aug 2024 13:51:55 +0000 Received: from pandora.armlinux.org.uk ([2001:4d48:ad52:32c8:5054:ff:fe00:142]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1scQ1Y-0000000BP3x-2hBQ for linux-arm-kernel@lists.infradead.org; Fri, 09 Aug 2024 13:51:22 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=armlinux.org.uk; s=pandora-2019; h=Sender:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=47NW2XTBLKy+JoGemROVoOjIno1OsPS387sub0zUsJQ=; b=DVRJMbD/d+b+ri1hqUPwI1BYpw AtUaI0DTXrCLJDf3Bk1fR8Cpn01NZsD+WFKzSgEtiOC5a1cl1sUQu7L0IkTfIFLN6gwMVEkjAoxIw LL5b24dTLZawDUUmTiznYYrKygtTy+roU9BMpeXIjeF1+dODK6XGAVEWQctsLYj5dzKo38vDfW362 0L/VMRKc/xgE4Cj1SlYpMcVGF8vHMAxHZfMOXNX96MRo78C3GCrDvT8ChpVp+2qOkMOtD8yAznFMB hy6mr+fZid/vjXCptuqgrV5vD7+mAZ4970PNQNiX+JJnvac7b9WKdUtaZNWcg4CTW2KPA8fppRte/ 2/ovtxGg==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:54196) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.96) (envelope-from ) id 1scPzC-0005zC-1t; Fri, 09 Aug 2024 14:48:54 +0100 Received: from linux by shell.armlinux.org.uk with local (Exim 4.94.2) (envelope-from ) id 1scPzC-0006Ah-U5; Fri, 09 Aug 2024 14:48:54 +0100 Date: Fri, 9 Aug 2024 14:48:54 +0100 From: "Russell King (Oracle)" To: Stefan Wiehler Cc: Will Deacon , Joel Fernandes , "Paul E. McKenney" , Josh Triplett , Boqun Feng , Steven Rostedt , Mathieu Desnoyers , Lai Jiangshan , Zqiang , linux-arm-kernel@lists.infradead.org, rcu@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] arm: smp: Avoid false positive CPU hotplug Lockdep-RCU splat Message-ID: References: <20240307160951.3607374-1-stefan.wiehler@nokia.com> <66fdce3a-c7f6-4ef4-ab56-7c9ece0b00e2@nokia.com> <20240312221440.GA29419@willie-the-truck> <20240313003244.GA29568@willie-the-truck> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240809_065120_701805_98AEB155 X-CRM114-Status: GOOD ( 16.66 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Fri, Aug 09, 2024 at 03:37:38PM +0200, Stefan Wiehler wrote: > Unfortunately I'm don't feel qualified to contribute to the discussion > on option 3. Russell and Will, would you be able to spare some time to > drive this further? Otherwise I would propose to make a decision on > going for option 1 or 2. Highly unlikely that I'm going to have any time what so ever as I'm undergoing a series of operations which are affecting my eye sight (over the next 3/4 days, I have only one usable eye while the vision in the other settles post-op.) I have little idea at the moment how this is going to pan out, or how long I can spend in front of the screen. Worst case, it could be well into September before I'm able to resume any serious kernel work. E.g. if the brain is unable to resolve the 3D imagine from both eyes next week. Then there'll be the second eye to be done at the earliest 30th August. Then there's waiting for the vision to settle in that eye. Then there's working out whether I need sight correction to see the screen and possibly getting a new set of lenses for the glasses. So... I think it's best to count me out on being able to solve this problem. Sorry. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 80Mbps down 10Mbps up. Decent connectivity at last!