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Tue, 08 Sep 2020 05:10:44 -0400 X-MC-Unique: m8ujtl1ENaGBQm8zAu0b9w-1 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 508DD80EF84; Tue, 8 Sep 2020 09:10:43 +0000 (UTC) Received: from [10.36.115.46] (ovpn-115-46.ams2.redhat.com [10.36.115.46]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5178E5C1BB; Tue, 8 Sep 2020 09:10:41 +0000 (UTC) Subject: Re: [PATCH v2 03/10] mm/memory_hotplug: simplify page offlining To: Michal Hocko , Andrew Morton Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, Wei Yang , Baoquan He , Pankaj Gupta , Oscar Salvador References: <20200903145844.2ead558f5bc3ef3d5230d30f@linux-foundation.org> <20200904122134.1000bb0bf6bc6baf7f5302a7@linux-foundation.org> <20200907064556.GB30144@dhcp22.suse.cz> From: David Hildenbrand Autocrypt: addr=david@redhat.com; prefer-encrypt=mutual; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.11.0 MIME-Version: 1.0 In-Reply-To: <20200907064556.GB30144@dhcp22.suse.cz> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.16 X-Rspamd-Queue-Id: 32CB21819E764 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam02 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 07.09.20 08:45, Michal Hocko wrote: > On Fri 04-09-20 12:21:34, Andrew Morton wrote: >> On Fri, 4 Sep 2020 07:47:45 +0200 David Hildenbrand wrote: > [...] >> @@ -1589,9 +1567,7 @@ int __ref offline_pages(unsigned long st >> reason = "failure to dissolve huge pages"; >> goto failed_removal_isolated; >> } >> - /* check again */ >> - ret = walk_system_ram_range(start_pfn, end_pfn - start_pfn, >> - NULL, check_pages_isolated_cb); >> + >> /* >> * per-cpu pages are drained in start_isolate_page_range, but if >> * there are still pages that are not free, make sure that we >> @@ -1604,15 +1580,15 @@ int __ref offline_pages(unsigned long st >> * because has_unmovable_pages explicitly checks for >> * PageBuddy on freed pages on other zones. >> */ >> + ret = test_pages_isolated(start_pfn, end_pfn, MEMORY_OFFLINE); >> if (ret) >> drain_all_pages(zone); >> } while (ret); > > Looks ok > Agreed, thanks Michal and Andrew. -- Thanks, David / dhildenb