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[209.85.208.45]) by smtp.gmail.com with ESMTPSA id h22-20020a50ed96000000b00522b7c5d53esm3388445edr.54.2023.07.31.12.07.48 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 31 Jul 2023 12:07:49 -0700 (PDT) Received: by mail-ed1-f45.google.com with SMTP id 4fb4d7f45d1cf-522aad4e82fso3901986a12.0 for ; Mon, 31 Jul 2023 12:07:48 -0700 (PDT) X-Received: by 2002:aa7:d702:0:b0:51e:d4b:3c9d with SMTP id t2-20020aa7d702000000b0051e0d4b3c9dmr679676edq.23.1690830468573; Mon, 31 Jul 2023 12:07:48 -0700 (PDT) MIME-Version: 1.0 References: <20230727212845.135673-1-david@redhat.com> <412bb30f-0417-802c-3fc4-a4e9d5891c5d@redhat.com> <66e26ad5-982e-fe2a-e4cd-de0e552da0ca@redhat.com> In-Reply-To: From: Linus Torvalds Date: Mon, 31 Jul 2023 12:07:19 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v1 0/4] smaps / mm/gup: fix gup_can_follow_protnone fallout To: David Hildenbrand Cc: Peter Xu , linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-fsdevel@vger.kernel.org, Andrew Morton , liubo , Matthew Wilcox , Hugh Dickins , Jason Gunthorpe , John Hubbard , Mel Gorman Content-Type: text/plain; charset="UTF-8" X-Rspamd-Queue-Id: 5509F4000C X-Rspam-User: X-Rspamd-Server: rspam05 X-Stat-Signature: wzis734346ta6euzat5rfr9ykfkufrk4 X-HE-Tag: 1690830470-802240 X-HE-Meta: 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 xRcQuaDf 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Mon, 31 Jul 2023 at 12:00, David Hildenbrand wrote: > > So in the "!writable" case, we would always call > get_user_pages_unlocked() and never honor NUMA faults. Ok, so kvm doesn't just use the fast version. Oh well. It was an idea.. Linus