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([2001:b07:6468:f312:e9bb:92e9:fcc3:7ba9]) by smtp.gmail.com with ESMTPSA id t12sm4018033wrs.96.2019.12.11.16.22.20 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 11 Dec 2019 16:22:21 -0800 (PST) Subject: Re: [PATCH v4 0/2] kvm: Use huge pages for DAX-backed files To: Barret Rhoden , Dan Williams , David Hildenbrand , Dave Jiang , Alexander Duyck Cc: linux-nvdimm@lists.01.org, x86@kernel.org, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, jason.zeng@intel.com References: <20191211213207.215936-1-brho@google.com> From: Paolo Bonzini Message-ID: <473dbb9d-b2ab-31ba-48ac-3b8216be46de@redhat.com> Date: Thu, 12 Dec 2019 01:22:21 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.1 MIME-Version: 1.0 In-Reply-To: <20191211213207.215936-1-brho@google.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/12/19 22:32, Barret Rhoden wrote: > This patchset allows KVM to map huge pages for DAX-backed files. > > I held previous versions in limbo while people were sorting out whether > or not DAX pages were going to remain PageReserved and how that relates > to KVM. > > Now that that is sorted out (DAX pages are PageReserved, but they are > not kvm_is_reserved_pfn(), and DAX pages are considered on a > case-by-case basis for KVM), I can repost this. > > v3 -> v4: > v3: https://lore.kernel.org/lkml/20190404202345.133553-1-brho@google.com/ > - Rebased onto linus/master > > v2 -> v3: > v2: https://lore.kernel.org/lkml/20181114215155.259978-1-brho@google.com/ > - Updated Acks/Reviewed-by > - Rebased onto linux-next > > v1 -> v2: > https://lore.kernel.org/lkml/20181109203921.178363-1-brho@google.com/ > - Updated Acks/Reviewed-by > - Minor touchups > - Added patch to remove redundant PageReserved() check > - Rebased onto linux-next > > RFC/discussion thread: > https://lore.kernel.org/lkml/20181029210716.212159-1-brho@google.com/ > > Barret Rhoden (2): > mm: make dev_pagemap_mapping_shift() externally visible > kvm: Use huge pages for DAX-backed files > > arch/x86/kvm/mmu/mmu.c | 36 ++++++++++++++++++++++++++++++++---- > include/linux/mm.h | 3 +++ > mm/memory-failure.c | 38 +++----------------------------------- > mm/util.c | 34 ++++++++++++++++++++++++++++++++++ > 4 files changed, 72 insertions(+), 39 deletions(-) > Thanks, with the Acked-by already in place for patch 1 I can pick this up. Paolo