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[173.79.56.208]) by smtp.gmail.com with ESMTPSA id af79cd13be357-7a67f3bb523sm555884785a.95.2024.08.27.07.33.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 27 Aug 2024 07:33:26 -0700 (PDT) Date: Tue, 27 Aug 2024 10:33:12 -0400 From: Gregory Price To: "Huang, Ying" Cc: linux-mm@kvack.org, akpm@linux-foundation.org, dave.jiang@intel.com, Jonathan.Cameron@huawei.com, horenchuang@bytedance.com, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, dan.j.williams@intel.com, lenb@kernel.org, "Aneesh Kumar K.V" Subject: Re: [PATCH] acpi/hmat,mm/memtier: always register hmat adist calculation callback Message-ID: References: <20240726215548.10653-1-gourry@gourry.net> <87ttg91046.fsf@yhuang6-desk2.ccr.corp.intel.com> <877cd3u1go.fsf@yhuang6-desk2.ccr.corp.intel.com> <87cymupd7r.fsf@yhuang6-desk2.ccr.corp.intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <87cymupd7r.fsf@yhuang6-desk2.ccr.corp.intel.com> X-Rspam-User: X-Stat-Signature: wh4zms7igcuzd5ytasjnkgf59nor9u63 X-Rspamd-Queue-Id: 244E140027 X-Rspamd-Server: rspam11 X-HE-Tag: 1724769207-679193 X-HE-Meta: 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 UqKzIyT6 iHZ7bobZuLiOO5hGaRauqPJ5tZsHqaiTAD4INdra01lv7tR62wNZqjKXJKYYV6ebSqKENoaBboJeVpEDzGaFWw7/8oKwDrxQi6yqo2DlAnEIpmH3fZvR/fQVPMc6FUna7HMy89UtI7vr03xZ/an3U+ARYrMMPHAMR6FlOeF1cvRBpRkb9cIburGe3Wr4t6l5hkTms9Vlco9u9SbtwyXMpSQ4fIfKh96qDpBcWKXgTXE9/3Wlw2lZERTRv7bm37GhNyC49ATS/C0Hm2mtVxMe4QhjPJ9rOFmdm7w8v/L3/TYqksKKbYpShTMLPDicKtzkbpDZO1xp2xvKDP4Khu/jzloO1eht9JYDPynQ+ 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: List-Subscribe: List-Unsubscribe: On Wed, Jul 31, 2024 at 09:22:32AM +0800, Huang, Ying wrote: > > > > This presumes driver configured devices, which is not always the case. > > > > kmem.c will set MEMTIER_DEFAULT_DAX_ADISTANCE > > > > but if BIOS/EFI has set up the node instead, you get the default of > > MEMTIER_ADISTANCE_DRAM if HMAT is not present or otherwise not sane. > > "efi_fake_mem=" kernel parameter can be used to add "EFI_MEMORY_SP" flag > to the memory range, so that kmem.c can manage it. > Worth noting: This feature was removed https://lore.kernel.org/all/20240620073205.1543145-1-ardb+git@google.com/ So I cannot even use this to manage it. ~Gregory