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 75887C433F5 for ; Wed, 5 Jan 2022 13:55:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:Cc: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=ewl1IXJzWrlJjXeupeBAWWMyh7TvIKuJCBDR/6tlaN0=; b=gUhcwWT5e2W4M+ eYkzwnNGyNquz0TseHtU79V6kmoB0k8eG1houhXTGpVJtDEDYdfhbYRUiWYpO5wJ79NZw43FHr2HE symQrOHPXMkuwBTbymiH3Ov/ypfQnqPLSRI4hhaWxCHX5t3Q60XrdDOiRn+4GKsH2YeSmYAdsYIA1 sIY8tyw4Zwsw7k22N0wtfH9DzwoEOjb0YSVCnJdggZoRnqdk/2xMFpSYC0Nb556mCopSkYkuWsict 7YddCAkzMGVp1Le+pnLPALTEWpEKjhlKuNbODzjlkDCoE/DQIyuXwDTcOw4O4cNX8axQnxMwwlH+i JFaqZ6tJnHcVC3onlGyA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1n56jN-00EtoW-Ee; Wed, 05 Jan 2022 13:53:33 +0000 Received: from pandora.armlinux.org.uk ([2001:4d48:ad52:32c8:5054:ff:fe00:142]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1n56jI-00EtnR-KI for linux-arm-kernel@lists.infradead.org; Wed, 05 Jan 2022 13:53:31 +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=kkiD2VavxZn0Wp7PKH9hvugEiFMUM3igIeXBQopwOT4=; b=rq7v+suYAL6dyc31hydeUplLUX KPE/p4MAVHNZGCWbxIIF3tSwfpULTsDI1jiOprGCUWq4mpXnvA6ZC0eSS0iCKnCPtQAbsxA6ljuO2 6AiovSZHbMZyBr7rq5L39qKBk8v48VwUD5Qg1txJS3ku8PMiz5/r69WyYbidfiLxsNTH4SKWvGLdY 4At/Yc+XcTGxekLjKcnuzOl7lULpVU6LpY22WJESUK10fCnmIvqSC2yT3hSH5/UN1sMxfRi6OU26v rjAQ87UANfLKokkjgsDoPAQQb/dan4NE9GTJ/ZBek+csPURN05qbpKij0GkQih+NWy4ivJRriApby yM7dPQaA==; Received: from shell.armlinux.org.uk ([fd8f:7570:feb6:1:5054:ff:fe00:4ec]:56594) by pandora.armlinux.org.uk with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1n56j5-000846-Pu; Wed, 05 Jan 2022 13:53:15 +0000 Received: from linux by shell.armlinux.org.uk with local (Exim 4.94.2) (envelope-from ) id 1n56iy-0008TT-7A; Wed, 05 Jan 2022 13:53:08 +0000 Date: Wed, 5 Jan 2022 13:53:08 +0000 From: "Russell King (Oracle)" To: Jon Hunter Cc: Ard Biesheuvel , Geert Uytterhoeven , Marek Szyprowski , Linux ARM , Nicolas Pitre , Arnd Bergmann , Kees Cook , Keith Packard , Linus Walleij , Nick Desaulniers , Tony Lindgren , Krzysztof Kozlowski , Linux Samsung SOC , Linux-Renesas , "linux-tegra@vger.kernel.org" Subject: Re: [PATCH v4 7/7] ARM: implement support for vmap'ed stacks Message-ID: References: <4ae3e371-68d0-64d7-713e-88af45875b3f@nvidia.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <4ae3e371-68d0-64d7-713e-88af45875b3f@nvidia.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220105_055328_697686_1FBB909A X-CRM114-Status: GOOD ( 24.14 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Jan 05, 2022 at 11:33:48AM +0000, Jon Hunter wrote: > On 05/01/2022 11:12, Ard Biesheuvel wrote: > > Thanks for the report. > > > > It would be helpful if you could provide some more context: > > - does it happen on a LPAE build too? > > - does it only happen on SMP capable systems? > > These are all SMP systems. > > > - does it reproduce on such systems when using only a single CPU? > > (i.e., pass 'nosmp' on the kernel command line) > > I would need to try this. Please note that I want an answer on the vmap stack patches by the end of today (UK time - so about five hours after this email has been sent) as we have only tonight and tomorrow's linux-next before the probable opening of the merge window. The options are: 1. The problem gets fixed today and I merge the fix today so it can get tested in linux-next over the next few days by the various build farms and test setups. 2. We postpone the merging of this until the very end of the merge window to give more time to sort out this mess - but what it means is keeping it in linux-next and keeping various platforms broken during that period. However, this is really not fair for other people, and some would say this isn't even an option. 3. We drop the entire series for this merge window, meaning it gets dropped from linux-next, and have another go for the neext merge window. Sorry for being so demanding, but we're far too close to the merge window to be trying to debug a feature that is clearly causing a regression for several platforms. -- RMK's Patch system: https://www.armlinux.org.uk/developer/patches/ FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last! _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel