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[2003:cb:c705:7400:6b3a:a74a:bd53:a018]) by smtp.gmail.com with ESMTPSA id z11-20020a05600c0a0b00b003a033177655sm21076465wmp.29.2022.07.18.03.51.23 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 18 Jul 2022 03:51:23 -0700 (PDT) Message-ID: <95b3c8f3-2e4d-fa2f-1552-580236eea485@redhat.com> Date: Mon, 18 Jul 2022 12:51:23 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.11.0 Subject: Re: [PATCH v9 04/14] mm: handling Non-LRU pages returned by vm_normal_pages To: Alex Sierra , jgg@nvidia.com Cc: Felix.Kuehling@amd.com, linux-mm@kvack.org, rcampbell@nvidia.com, linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, hch@lst.de, jglisse@redhat.com, apopple@nvidia.com, willy@infradead.org, akpm@linux-foundation.org References: <20220715150521.18165-1-alex.sierra@amd.com> <20220715150521.18165-5-alex.sierra@amd.com> From: David Hildenbrand Organization: Red Hat In-Reply-To: <20220715150521.18165-5-alex.sierra@amd.com> X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit ARC-Authentication-Results: i=1; imf11.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=FZOrCaF0; dmarc=pass (policy=none) header.from=redhat.com; spf=none (imf11.hostedemail.com: domain of david@redhat.com has no SPF policy when checking 170.10.133.124) smtp.mailfrom=david@redhat.com ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1658141499; a=rsa-sha256; cv=none; b=gR4M+lcft5JME53rj1NrLZJ0iWRCi/Jzagnn9K5B3fvSpWq8fcZMz/cguTkWrumhiYtWr9 Slk41Nw0DOxfixSgRuztZ0ksK+vyFb+O0v5O6Cc4JJOhPsGb9B5QD+mG7QnpkmWOXUexd7 ghEyAQ9Y0E3XkKzMreJYZ+vsLninNR8= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1658141499; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=QQ3EHE5Y/uXmTBk59WY/sBfkyYOaAyrJ99vyQlUJOsY=; b=3J1L0Nq/vGDypAIpcCxcDHOrQLwnUIoDRDMy8+bT4n07AlyENFdCAtjIcxEdjlV9+Sfyo7 SYOMJcsuSQEthXuOlcVPXRpV84Zi//yqpja5x5KjLWjl/UlfbxSNMtL++FICixQNkWTK0M SnmHBCd16QCO/EBGFuQzduVPZ28LNRo= Authentication-Results: imf11.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=FZOrCaF0; dmarc=pass (policy=none) header.from=redhat.com; spf=none (imf11.hostedemail.com: domain of david@redhat.com has no SPF policy when checking 170.10.133.124) smtp.mailfrom=david@redhat.com X-Rspam-User: X-Stat-Signature: h1jpww4wzmmg1tsqe91wuhx98jspughb X-Rspamd-Queue-Id: 3621E4008A X-Rspamd-Server: rspam03 X-HE-Tag: 1658141499-321654 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 15.07.22 17:05, Alex Sierra wrote: > With DEVICE_COHERENT, we'll soon have vm_normal_pages() return > device-managed anonymous pages that are not LRU pages. Although they > behave like normal pages for purposes of mapping in CPU page, and for > COW. They do not support LRU lists, NUMA migration or THP. > > Callers to follow_page() currently don't expect ZONE_DEVICE pages, > however, with DEVICE_COHERENT we might now return ZONE_DEVICE. Check > for ZONE_DEVICE pages in applicable users of follow_page() as well. > > Signed-off-by: Alex Sierra > Acked-by: Felix Kuehling (v2) > Reviewed-by: Alistair Popple (v6) > Acked-by: David Hildenbrand -- Thanks, David / dhildenb