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 A261FC25B77 for ; Fri, 17 May 2024 11:38:08 +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=iMA61HPLwQu/kJqWYmWrzyWDbx8bnhwJTxcLwcW0xoY=; b=4OigKK8SeciEi0 0OuP5pjNQZCFo11erVejo63+oyBg/StGlf9FjCvAGGH+ZGvk3B/Y+S2UKtOPz9kTPaIYyYqfjmPB5 IDqvoUfPv0zyAoDfx0f48nG57r7yaZTrkgA4pGcYEOzK6gTQ1s4LhJKTBPMuGZ+9VAKfIJxZokf2J 09MXvmTg1SaJuOXmwFOOA1Sjg1Sh8nqrtlXauKOnlPnoiZr0S3gJ7mM17dgDYPz0uJaZ53H5zuS3R Ujhh2TRJwRnZAQM+BZoQEoJ7aKu3j42HSiX/BWUFF94luraIkq8dgJ4rK6gA7hC5Buh+2vQ3/sTh4 NeeAGv1GXwgLA/mh0o2A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1s7vuL-00000007g3K-4C0R; Fri, 17 May 2024 11:37:54 +0000 Received: from sin.source.kernel.org ([145.40.73.55]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1s7vuI-00000007g1q-3pTN for linux-arm-kernel@lists.infradead.org; Fri, 17 May 2024 11:37:52 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sin.source.kernel.org (Postfix) with ESMTP id 466B4CE1AC5; Fri, 17 May 2024 11:37:45 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id CB077C2BD11; Fri, 17 May 2024 11:37:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1715945864; bh=rQbUWDcg6Mi2PzxW4jZ/HY3toGFZHdD29fKfQaCNUsQ=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=c9nCe5oZlPlXHs4COP/yaRblI2KMDQLnES61sDS93KaJpMqYfMpklHuI/8KNHCeAs hAv0YS6SoympTGi9DXqgfgd+Zrhwq6oyCCOEBNsJbRaRRcsk8O/vTE03JiD1XhemjJ rCNPcKQVHe2juq0GxyHCyFrI77wDOjnHWSLEPeH9e6wpfijbz96j8AJqy6PFnIFjlx Atq/Pt3D7RdtltK0Yos63a89mnhPRuUGfZ/zkZDtR5OEoU+yCPNkR2wbrWU2nj0xJT lVOvDhzZHH12kybdK2Z1JdtjYg3Qdq4zvIx8WoM2ngvAiZOSbF9qJh/NhA7asNq+RJ 87qpFJSBf/U2Q== Date: Fri, 17 May 2024 12:37:39 +0100 From: Will Deacon To: Ard Biesheuvel Cc: Marc Zyngier , Catalin Marinas , Mark Rutland , Johannes Nixdorf , Mark Brown , linux-arm-kernel@lists.infradead.org Subject: Re: [BUG] dm-crypt broken after 2632e2521769 ("arm64: fpsimd: Implement lazy restore for kernel mode FPSIMD") Message-ID: <20240517113738.GA32506@willie-the-truck> References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: 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-20240517_043751_171985_724B58E4 X-CRM114-Status: GOOD ( 13.86 ) 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 Thu, May 16, 2024 at 07:17:00PM +0200, Ard Biesheuvel wrote: > On Thu, 16 May 2024 at 18:25, Marc Zyngier wrote: > > > > + Ard, Broonie > > > > Ugh. > > This is going to be tricky to track down if it takes 10G of data to reproduce. > > For the time being, maybe we should just revert and take the time to > really dig into this? > > It appears to revert cleanly, and the performance gain of the > optimization was never quantified in the first place, so perhaps we > should get some numbers too when we bring it back. Given that 6.8 is affected too, I'll queue up the revert with a cc stable now. Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel