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,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 078E3C433DB for ; Mon, 1 Mar 2021 14:21:13 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 9294964DBA for ; Mon, 1 Mar 2021 14:21:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 9294964DBA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 279608D0074; Mon, 1 Mar 2021 09:21:12 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 22A758D0063; Mon, 1 Mar 2021 09:21:12 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 1401C8D0074; Mon, 1 Mar 2021 09:21:12 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0163.hostedemail.com [216.40.44.163]) by kanga.kvack.org (Postfix) with ESMTP id F1AD98D0063 for ; Mon, 1 Mar 2021 09:21:11 -0500 (EST) Received: from smtpin14.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id B31A463FA for ; Mon, 1 Mar 2021 14:21:11 +0000 (UTC) X-FDA: 77871517542.14.9B86BB9 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [63.128.21.124]) by imf08.hostedemail.com (Postfix) with ESMTP id 99F31801A803 for ; Mon, 1 Mar 2021 14:20:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1614608455; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=k0P/L7vyhbk0Jakxn5ixVUmN+55ZNwUUNhVXiDSCjXM=; b=ievEKSA4s+9BIjRBhSij2Cgws/wWanjbCqaH9DVtSSASkgwJ0wx+XCrMmDr5amOew7yo5Y Ymcit7ivbe/Wu1K92DJLaQW5vaYeO67Y2fSc9gWPGgt+tM2k5bCTZR+R3j3uPyOf3ND+mh PTY2ETZO670pyktte/EUwpvA+rKh9y0= Received: from mail-qk1-f197.google.com (mail-qk1-f197.google.com [209.85.222.197]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-102-BHQQjaggPWmkZVfesCCAmQ-1; Mon, 01 Mar 2021 09:20:53 -0500 X-MC-Unique: BHQQjaggPWmkZVfesCCAmQ-1 Received: by mail-qk1-f197.google.com with SMTP id 130so1836824qkm.0 for ; Mon, 01 Mar 2021 06:20:53 -0800 (PST) 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=k0P/L7vyhbk0Jakxn5ixVUmN+55ZNwUUNhVXiDSCjXM=; b=p/+Z0q5G8r3ej0qI7rW2iL3DHb+CpkbUUc1w5F9CFwFvjfAYDbLonjgqXoarClM8m3 lZdAzGrj1jn+S5KuLiL6P8cj6vyTAojO+piaUCO9Hp1ioWmx0QN4R0fhMeSUZ5KjMs3w e+T9El5q7PD+39YXgjWWfrE85pVGHRO0dWPE9FAT46YHp08qOlIVhR8WKxJSVKH+Iqdh bfZDmL78gGy4ZLlnlMsZ6+EUDoxtye/LbAV7ax9Sg1HrWyX4tlhvg4fLtsi3UQYdZP3u 2vPdddOjkNdVLs2bq0uYas9CJpgCx1rvxdLhPWAvIrfXapOtG3FKyZuxeg3mXyB20CPN Rc7g== X-Gm-Message-State: AOAM531/6NY0gu7og7UVPWR0my2lCM1VMjTZ1FNBNsmu6ttecG8pjZs9 mBCMDGAlGbxzIgWl+/J/PAGeTN6TA7BNS6udOnV5ua9Kyd3eYImsRDgrCgCpQuBUxDbYO406GzY d+BwOgXqI4vk= X-Received: by 2002:a37:8806:: with SMTP id k6mr14528846qkd.339.1614608452866; Mon, 01 Mar 2021 06:20:52 -0800 (PST) X-Google-Smtp-Source: ABdhPJzY4ABWGsP46BTB5l94tjQhB4j4ZpPbXjRNgvNmUEIPT+LbysCIH6FnNTtHut6WPCL+EwmMvQ== X-Received: by 2002:a37:8806:: with SMTP id k6mr14528809qkd.339.1614608452444; Mon, 01 Mar 2021 06:20:52 -0800 (PST) Received: from xz-x1 (bras-vprn-toroon474qw-lp130-25-174-95-95-253.dsl.bell.ca. [174.95.95.253]) by smtp.gmail.com with ESMTPSA id p66sm12464588qkd.57.2021.03.01.06.20.50 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 01 Mar 2021 06:20:51 -0800 (PST) Date: Mon, 1 Mar 2021 09:20:49 -0500 From: Peter Xu To: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Mike Kravetz , Andrew Morton Cc: Andrew Morton , Matthew Wilcox , Axel Rasmussen , "Kirill A . Shutemov" , Mike Rapoport , Mike Kravetz , Andrea Arcangeli Subject: Re: [PATCH v4 0/4] hugetlb: Disable huge pmd unshare for uffd-wp Message-ID: <20210301142049.GB397383@xz-x1> References: <20210218230633.15028-1-peterx@redhat.com> MIME-Version: 1.0 In-Reply-To: <20210218230633.15028-1-peterx@redhat.com> Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=peterx@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=utf-8 Content-Disposition: inline X-Rspamd-Server: rspam03 X-Rspamd-Queue-Id: 99F31801A803 X-Stat-Signature: n1bz1trcskmb16ekou1bk4tq1dgsjr4i Received-SPF: none (redhat.com>: No applicable sender policy available) receiver=imf08; identity=mailfrom; envelope-from=""; helo=us-smtp-delivery-124.mimecast.com; client-ip=63.128.21.124 X-HE-DKIM-Result: pass/pass X-HE-Tag: 1614608448-176589 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000097, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, Feb 18, 2021 at 06:06:29PM -0500, Peter Xu wrote: > v4: > - fix build for sparc by removing extra line in patch 1 [Mike] > - pick Mike's r-b for patch 4 > > v3: > - patch 4: > - fix build failure for !CMA and/or !HUGETLBFS [Axel] > - Fix mmu notifier range to use start/end [Mike] > - add more r-bs > > v2: > - patch 4: move hugetlb_unshare_all_pmds() into mm/hugetlb.c, so it can be used > even outside userfaultfd.c > > This series tries to disable huge pmd unshare of hugetlbfs backed memory for > uffd-wp. Although uffd-wp of hugetlbfs is still during rfc stage, the idea of > this series may be needed for multiple tasks (Axel's uffd minor fault series, > and Mike's soft dirty series), so I picked it out from the larger series. > > References works: > > Uffd shmem+hugetlbfs rfc: > https://lore.kernel.org/lkml/20210115170907.24498-1-peterx@redhat.com/ > > Uffd minor mode for hugetlbfs: > https://lore.kernel.org/lkml/20210212215403.3457686-1-axelrasmussen@google.com/ > > Soft dirty for hugetlbfs: > https://lore.kernel.org/lkml/20210211000322.159437-1-mike.kravetz@oracle.com/ Andrew/Mike, Do you have any further comment on this series? Thanks, -- Peter Xu