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,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS 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 C9370C433B4 for ; Fri, 23 Apr 2021 13:01:14 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8D77261422 for ; Fri, 23 Apr 2021 13:01:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242541AbhDWNBt (ORCPT ); Fri, 23 Apr 2021 09:01:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50798 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229479AbhDWNBp (ORCPT ); Fri, 23 Apr 2021 09:01:45 -0400 Received: from mail-ed1-x533.google.com (mail-ed1-x533.google.com [IPv6:2a00:1450:4864:20::533]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 82148C061574 for ; Fri, 23 Apr 2021 06:01:08 -0700 (PDT) Received: by mail-ed1-x533.google.com with SMTP id e7so57282659edu.10 for ; Fri, 23 Apr 2021 06:01:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=2rHamcAk69i1heErTD043nvHWdBaYcGMYqk0SxlLX3w=; b=AI4OF1eHAcLvyWD6iouxBu3wzPXbE7lqxD/nvUDlUK6sCGPvqEiURU18cQsgP60E9B 79XpQibjTf/FlzQDqoN1m5Xox0apvDhFykYVGLADrOrtndSOh4jcTHehoSL6CP5+tm3A K0hA7VUPU7KcWWquu+KenypCJDq2PzLWPT13f3BEr3icJCOt6wvTHM2Vbdp3dw0p4ELx dJMs/UerJVfhV13oS+6JAVOptYzHzjOwPt3NZPtEdroHfd5ogVdtz78kjCWB/KMlKxrO UeVaHJ8m1HYcZ0RhK4C8RpAYQU5X1LCldsFsS/aQlKYGbqWoMuPE27tWoUwBkuhT49t9 nruA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=2rHamcAk69i1heErTD043nvHWdBaYcGMYqk0SxlLX3w=; b=t/WUwsADUIHn7GmN/+cMnt0lpkP8P9f2YtuwD2F91V6mU/F/c9epUGSsmLauYVla5l X4f5wQnMOxqhmL5ICPM1aaYhXLIgL6E3gWO0zGIvMlUfRWCNecicrtdVlUMnBR1C8JB5 n6244RtgWZBkpRKS81Gg2u3iGihUVuVc90XnRa5Se8HUK0Ep6FoCA9107/eMh5D7rDO5 R/FB8dFwydXNllQk0D0t77VaxjJ13jqRJdhJchKZBnslTlkPIl7eHM4VvaH4lR9YDvxG Xj8FhW2qj9rfiSVNpSlqovO2F5sZ63+0YV6g3ZYhABsaN0/QUmxlu1uPbNHbwiZDpg5b NfQQ== X-Gm-Message-State: AOAM531kbNmXfaHmDBTpmFegOymchWnGpPFtNni8dRxK1ypR4d8qAELA KBGbUlJOtJ7Xgy5csoj0iF/Xsg== X-Google-Smtp-Source: ABdhPJyDrw4UO6yanfUyRpsU9b8VpZWr1Al+SSF6+YcbsniqaahON/TAvV32FxXYlw+iumrp6+ExVg== X-Received: by 2002:a05:6402:4d1:: with SMTP id n17mr4292611edw.118.1619182867214; Fri, 23 Apr 2021 06:01:07 -0700 (PDT) Received: from myrica ([2001:1715:4e26:a7e0:116c:c27a:3e7f:5eaf]) by smtp.gmail.com with ESMTPSA id d14sm4537418edc.11.2021.04.23.06.01.06 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 23 Apr 2021 06:01:06 -0700 (PDT) Date: Fri, 23 Apr 2021 15:00:48 +0200 From: Jean-Philippe Brucker To: Sumit Gupta Cc: eric.auger@redhat.com, alex.williamson@redhat.com, eric.auger.pro@gmail.com, iommu@lists.linux-foundation.org, jiangkunkun@huawei.com, joro@8bytes.org, kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org, lushenming@huawei.com, maz@kernel.org, robin.murphy@arm.com, tn@semihalf.com, vivek.gautam@arm.com, vsethi@nvidia.com, wangxingang5@huawei.com, will@kernel.org, zhangfei.gao@linaro.org, zhukeqian1@huawei.com, vdumpa@nvidia.com Subject: Re: [PATCH v14 00/13] SMMUv3 Nested Stage Setup (IOMMU part) Message-ID: References: <1619103878-6664-1-git-send-email-sumitg@nvidia.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <1619103878-6664-1-git-send-email-sumitg@nvidia.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Sumit, On Thu, Apr 22, 2021 at 08:34:38PM +0530, Sumit Gupta wrote: > Had to revert patch "mm: notify remote TLBs when dirtying a PTE". Did that patch cause any issue, or is it just not needed on your system? It fixes an hypothetical problem with the way ATS is implemented. Maybe I actually observed it on an old software model, I don't remember. Either way it's unlikely to go upstream but I'd like to know if I should drop it from my tree. Thanks, Jean