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[209.132.183.28]) by mx.google.com with ESMTPS id c15si1246913qkc.73.2019.05.13.03.01.43 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 13 May 2019 03:01:43 -0700 (PDT) Received-SPF: pass (google.com: domain of david@redhat.com designates 209.132.183.28 as permitted sender) client-ip=209.132.183.28; Authentication-Results: mx.google.com; spf=pass (google.com: domain of david@redhat.com designates 209.132.183.28 as permitted sender) smtp.mailfrom=david@redhat.com; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=redhat.com Received: from smtp.corp.redhat.com (int-mx05.intmail.prod.int.phx2.redhat.com [10.5.11.15]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 5C07223E6CE; Mon, 13 May 2019 10:01:42 +0000 (UTC) Received: from [10.36.117.84] (ovpn-117-84.ams2.redhat.com [10.36.117.84]) by smtp.corp.redhat.com (Postfix) with ESMTP id 5F4FE5D706; Mon, 13 May 2019 10:01:37 +0000 (UTC) Subject: Re: [PATCH V2 0/2] arm64/mm: Enable memory hot remove To: Anshuman Khandual , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org, akpm@linux-foundation.org, will.deacon@arm.com, catalin.marinas@arm.com Cc: mhocko@suse.com, mgorman@techsingularity.net, james.morse@arm.com, mark.rutland@arm.com, robin.murphy@arm.com, cpandya@codeaurora.org, arunks@codeaurora.org, dan.j.williams@intel.com, osalvador@suse.de, cai@lca.pw, logang@deltatee.com, ira.weiny@intel.com References: <1555221553-18845-1-git-send-email-anshuman.khandual@arm.com> <67efff12-6d7f-9696-0c34-c9ad11acd297@arm.com> From: David Hildenbrand Openpgp: preference=signencrypt Autocrypt: addr=david@redhat.com; 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Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.6.1 MIME-Version: 1.0 In-Reply-To: <67efff12-6d7f-9696-0c34-c9ad11acd297@arm.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.15 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.29]); Mon, 13 May 2019 10:01:42 +0000 (UTC) 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 13.05.19 10:37, Anshuman Khandual wrote: > > > On 05/13/2019 01:52 PM, David Hildenbrand wrote: >> On 14.04.19 07:59, Anshuman Khandual wrote: >>> This series enables memory hot remove on arm64 after fixing a memblock >>> removal ordering problem in generic __remove_memory(). This is based >>> on the following arm64 working tree. >>> >>> git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core >>> >>> Testing: >>> >>> Tested hot remove on arm64 for all 4K, 16K, 64K page config options with >>> all possible VA_BITS and PGTABLE_LEVELS combinations. Build tested on non >>> arm64 platforms. >>> >>> Changes in V2: >>> >>> - Added all received review and ack tags >>> - Split the series from ZONE_DEVICE enablement for better review >>> >>> - Moved memblock re-order patch to the front as per Robin Murphy >>> - Updated commit message on memblock re-order patch per Michal Hocko >>> >>> - Dropped [pmd|pud]_large() definitions >>> - Used existing [pmd|pud]_sect() instead of earlier [pmd|pud]_large() >>> - Removed __meminit and __ref tags as per Oscar Salvador >>> - Dropped unnecessary 'ret' init in arch_add_memory() per Robin Murphy >>> - Skipped calling into pgtable_page_dtor() for linear mapping page table >>> pages and updated all relevant functions >>> >>> Changes in V1: (https://lkml.org/lkml/2019/4/3/28) >>> >>> Anshuman Khandual (2): >>> mm/hotplug: Reorder arch_remove_memory() call in __remove_memory() >>> arm64/mm: Enable memory hot remove >>> >>> arch/arm64/Kconfig | 3 + >>> arch/arm64/include/asm/pgtable.h | 2 + >>> arch/arm64/mm/mmu.c | 221 ++++++++++++++++++++++++++++++++++++++- >>> mm/memory_hotplug.c | 3 +- >>> 4 files changed, 225 insertions(+), 4 deletions(-) >>> >> >> What's the progress of this series? I'll need arch_remove_memory() for >> the series >> >> [PATCH v2 0/8] mm/memory_hotplug: Factor out memory block device handling >> > > Hello David, > > I am almost done with the next version with respect to memory hot-remove i.e > arch_remove_memory(). But most of the time was spent addressing concerns with > respect to how memory hot remove is going to impact existing arm64 and generic > code which can concurrently walk or modify init_mm page table. I should be > sending out V3 this week or early next week. Okay, thanks! > > - Anshuman > -- Thanks, David / dhildenb