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[2003:cb:c708:e600:d4fa:af4b:d7b6:20df]) by smtp.gmail.com with ESMTPSA id n35-20020a05600c3ba300b003a039054567sm3206358wms.18.2022.06.29.11.48.30 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 29 Jun 2022 11:48:31 -0700 (PDT) Message-ID: <2e3e1050-7fa4-106b-9c80-6321afc5ac42@redhat.com> Date: Wed, 29 Jun 2022 20:48:30 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.0 Subject: Re: [PATCH v7 02/14] mm: add zone device coherent type memory support 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: <20220629035426.20013-1-alex.sierra@amd.com> <20220629035426.20013-3-alex.sierra@amd.com> From: David Hildenbrand Organization: Red Hat In-Reply-To: <20220629035426.20013-3-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-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1656528522; a=rsa-sha256; cv=none; b=NPtZtJLFCQOXEOVOvqDFrXkUjoh6krJiYS/suq6UjUpjRqCwJG2X1RBUz1rVovPxtJ4OpT cAfIvi1PugIKlgCagGYd0AN2Nkxpn2liLMBslapnUoeizNTfn9s93W3wUfiuX75wqctOTW mLRotEyzHHT7/A4QChsfRUa95ZHGytU= ARC-Authentication-Results: i=1; imf23.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=TTRXZLrx; spf=none (imf23.hostedemail.com: domain of david@redhat.com has no SPF policy when checking 170.10.133.124) smtp.mailfrom=david@redhat.com; dmarc=pass (policy=none) header.from=redhat.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1656528522; 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=4ZM4Ql5QJUmiVq6/iTZYAWyD16J7WFBV3CLn4iAwAjY=; b=WMAorWx5njylbKZkXX6Miw4k2IGAXAFTU8SyaArzoojyW32cLlJFNefR2QBqx2JhallQM5 ZFl9YypuKvwcnX4v1ICGnje/NKo7tepK8M6oKzZnEJQSAtyeQToLm5N0dEPTthRleQBf9m Dtxqf8cxXf5oOUmdIvZEmWknOLV6eRg= X-Rspam-User: Authentication-Results: imf23.hostedemail.com; dkim=pass header.d=redhat.com header.s=mimecast20190719 header.b=TTRXZLrx; spf=none (imf23.hostedemail.com: domain of david@redhat.com has no SPF policy when checking 170.10.133.124) smtp.mailfrom=david@redhat.com; dmarc=pass (policy=none) header.from=redhat.com X-Rspamd-Server: rspam02 X-Stat-Signature: pas76ghaqsoc766ei4ejnoqbhw3tqmrg X-Rspamd-Queue-Id: A2113140034 X-HE-Tag: 1656528522-184481 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 29.06.22 05:54, Alex Sierra wrote: > Device memory that is cache coherent from device and CPU point of view. > This is used on platforms that have an advanced system bus (like CAPI > or CXL). Any page of a process can be migrated to such memory. However, > no one should be allowed to pin such memory so that it can always be > evicted. > > Signed-off-by: Alex Sierra > Acked-by: Felix Kuehling > Reviewed-by: Alistair Popple > [hch: rebased ontop of the refcount changes, > removed is_dev_private_or_coherent_page] > Signed-off-by: Christoph Hellwig >From what I can tell, this looks good to me Acked-by: David Hildenbrand -- Thanks, David / dhildenb