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[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 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20210218230633.15028-1-peterx@redhat.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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