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[2003:cb:c73f:e900:3b0d:87a6:2953:20d1]) by smtp.gmail.com with ESMTPSA id m14-20020a7bcb8e000000b003fbc9371193sm12862042wmi.13.2023.07.25.03.06.58 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 25 Jul 2023 03:06:59 -0700 (PDT) Message-ID: <315cc808-ab62-c133-8579-7e13010ac9c7@redhat.com> Date: Tue, 25 Jul 2023 12:06:58 +0200 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.13.0 Subject: Re: [PATCH v5 0/7] Add support for memmap on memory feature on ppc64 To: "Aneesh Kumar K.V" , linux-mm@kvack.org, akpm@linux-foundation.org, mpe@ellerman.id.au, linuxppc-dev@lists.ozlabs.org, npiggin@gmail.com, christophe.leroy@csgroup.eu Cc: Oscar Salvador , Michal Hocko , Vishal Verma References: <20230725100212.531277-1-aneesh.kumar@linux.ibm.com> From: David Hildenbrand Organization: Red Hat In-Reply-To: <20230725100212.531277-1-aneesh.kumar@linux.ibm.com> X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam08 X-Rspamd-Queue-Id: 096771C000F X-Stat-Signature: 35zkhisixnawmwkw7ggdjfkt9ax4ky73 X-Rspam-User: X-HE-Tag: 1690279624-153954 X-HE-Meta: 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 MpIkVAXK aHx1zpD98DNiIYD80Nb4U/xnjDhf/XzinqM226JbdLA2vfkZFrwPvtvRVmpJruwfqUjytezBc8neJzYV0Pt/yLcbiRwhluxwUSrfy1c7rh+f1DCKk6rebDbFzVy57NB4T+Egc+N8PDg+SzCbrBml9CQLNO7tc0rq6g/2pNDPtvTXy6/6TfXH0yari6X04TWlgep08yz66t9nIkIYANUxphzUWsLGpdErBn1r9jXES8Ir7S9ff3GJ55z81JRE7Q1VUOjNhXlhQ3CFfYdLvpqpO8uawUiNED3bFDDnjCQxuUDP708vUaC9lw+GNlldm378DIX2JZQKM1Uy9zDFBRQ20bSx2klWGtXISnntuKK57IEyobIIxUAyXh++TRdHUIitxyD8xY7bmqZ7i/sjyxw0W0rTWXJl++lpqvaGy84f5eC+UX6nabqnCkgU7pLDU57PuYk5+qLQxldEEdjTm+IszSdCv5g== 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 25.07.23 12:02, Aneesh Kumar K.V wrote: > This patch series update memmap on memory feature to fall back to > memmap allocation outside the memory block if the alignment rules are > not met. This makes the feature more useful on architectures like > ppc64 where alignment rules are different with 64K page size. > > This patch series is dependent on dax vmemmap optimization series > posted here > https://lore.kernel.org/linux-mm/20230718022934.90447-1-aneesh.kumar@linux.ibm.com/ > > Changes from v4: > * Use altmap.free instead of altmap.reserve > * Address review feedback > > Changes from v3: > * Extend the module parameter memmap_on_memory to force allocation even > though we can waste hotplug memory. > > Changes from v2: > * Rebase to latest linus tree > * Redo the series based on review feedback. Multiple changes to the patchset. > > Changes from v1: > * update the memblock to store vmemmap_altmap details. This is required > so that when we remove the memory we can find the altmap details which > is needed on some architectures. > * rebase to latest linus tree > > > > Aneesh Kumar K.V (7): > mm/hotplug: Simplify ARCH_MHP_MEMMAP_ON_MEMORY_ENABLE kconfig > mm/hotplug: Allow memmap on memory hotplug request to fallback > mm/hotplug: Allow architecture to override memmap on memory support > check > mm/hotplug: Support memmap_on_memory when memmap is not aligned to > pageblocks > powerpc/book3s64/memhotplug: Enable memmap on memory for radix > mm/hotplug: Embed vmem_altmap details in memory block > mm/hotplug: Enable runtime update of memmap_on_memory parameter Nit for all patches: we use "mm/memory_hotplug" as prefix. (I somehow missed that earlier :D ) -- Cheers, David / dhildenb