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=-5.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,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 A23ACC433E6 for ; Wed, 27 Jan 2021 17:17:35 +0000 (UTC) Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) (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 3F05164DA3 for ; Wed, 27 Jan 2021 17:17:35 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3F05164DA3 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+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=merlin.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=tAxLSsjLFWfB4cZhMCTrlokQVR2Etet+AdTI7yvyUkI=; b=RaZgNjoiRuu2T2GkqrSKYyKNy /4VLtAI+3vbN7WqkKxvA2A76/YWbR/Bx65Lqix8sEKR4jglM1PoNRK0JxxYMyVofFCAqxQYbxnU79 QhYq0GECV3orx+QRUP6o7lhXDZl2sCSnpHAx/9RnA5zlU8Rw0norwuAs2askOuOe1mxnkSadoMgsc fuc8QlbpvYwJa2eMB5kWlElJek4hdDjkfQ8NePjnXszINSJImvbdxu9bj5reIDiGNaVfU4wk+rl8K F2VmWW7GEbzteeEsMiyQOml8nsEFg6wkKZnx0H6V6lK188sCFwOZ8KrCyMMhpmRXPGAk83Swt3vsp eqYszs9Ig==; Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1l4oQS-0003BR-V2; Wed, 27 Jan 2021 17:16:17 +0000 Received: from mail.kernel.org ([198.145.29.99]) by merlin.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1l4oQP-00039Q-Gf for linux-arm-kernel@lists.infradead.org; Wed, 27 Jan 2021 17:16:14 +0000 Received: by mail.kernel.org (Postfix) with ESMTPSA id 3543864D99; Wed, 27 Jan 2021 17:16:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1611767772; bh=QEn3AwN++ibSZJbYsfjHXLopDcjytE0gWYxS4s3GF0Y=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=rxjRVJoX2E1b3ub3NeXROX65hjFV/n3ruiDX3Jg2rFspZSMEQYHzkQ+DhSocI9MFy V8Lz947ClecGI7JzSVvBD/apXNXAhwDvaLSvB2bcZCdqBFnXa8fT/mkjSts7uCMtyB gqZfF4y8iSF+TZHdXCMMdKG3qBmTEQVqKIY6e9eIGl3/X6fQSg0G6uWAC1c0GNEoWB aubrx1wrsptYu8LS0SrOkAvUpdzrOjM3QNohwquR8iCEJ9osuK8FLOSD39IJ7igtle BDYb9/BUm/2uZaTUzqkUE/xOApbDCFLdUpxLTFQhwy4h7JWwNFCXuWfFv6+guQPdNX CDEkII+uEdF1w== Date: Wed, 27 Jan 2021 17:16:06 +0000 From: Will Deacon To: Hugh Dickins Subject: Re: [PATCH v4 0/8] Create 'old' ptes for faultaround mappings on arm64 with hardware access flag Message-ID: <20210127171605.GD358@willie-the-truck> References: <20210120173612.20913-1-will@kernel.org> <20210126230851.GE30941@willie-the-truck> 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-20210127_121613_680061_6E25E8A0 X-CRM114-Status: GOOD ( 21.45 ) 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: kernel-team@android.com, Jan Kara , Minchan Kim , Catalin Marinas , Nick Desaulniers , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Vinayak Menon , "Kirill A . Shutemov" , Andrew Morton , Linus Torvalds , 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+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Jan 26, 2021 at 03:28:22PM -0800, Hugh Dickins wrote: > On Tue, 26 Jan 2021, Will Deacon wrote: > > On Wed, Jan 20, 2021 at 05:36:04PM +0000, Will Deacon wrote: > > > Hi all, > > > > > > This is version four of the patches I previously posted here: > > > > > > v1: https://lore.kernel.org/r/20201209163950.8494-1-will@kernel.org > > > v2: https://lore.kernel.org/r/20210108171517.5290-1-will@kernel.org > > > v3: https://lore.kernel.org/r/20210114175934.13070-1-will@kernel.org > > > > > > The patches allow architectures to opt-in at runtime for faultaround > > > mappings to be created as 'old' instead of 'young'. Although there have > > > been previous attempts at this, they failed either because the decision > > > was deferred to userspace [1] or because it was done unconditionally and > > > shown to regress benchmarks for particular architectures [2]. > > > > > > The big change since v3 is that the immutable fields of 'struct vm_fault' > > > now live in a 'const' anonymous struct. Although Clang will silently > > > accept modifications to these fields [3], GCC emits an error. The > > > resulting diffstat is _considerably_ more manageable with this approach. > > > > The only changes I have pending against this series are cosmetic (commit > > logs). Can I go ahead and queue this in the arm64 tree so that it can sit > > in linux-next for a bit? (positive or negative feedback appreciated!). > > That would be fine by me: I ran v3 on rc3, then the nicer smaller v4 > on rc4, and saw no problems when running either of them (x86_64 only). Thanks, Hugh. I'll stick these into -next later today and we'll see how we get on. Will _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel