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[173.79.56.208]) by smtp.gmail.com with ESMTPSA id af79cd13be357-7c00a90cbe0sm314316485a.102.2025.02.01.08.53.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 01 Feb 2025 08:54:00 -0800 (PST) Date: Sat, 1 Feb 2025 11:53:57 -0500 From: Gregory Price To: Honggyu Kim Cc: Joshua Hahn , ying.huang@linux.alibaba.com, rafael@kernel.org, lenb@kernel.org, gregkh@linuxfoundation.org, akpm@linux-foundation.org, honggyu.kim@sk.com, rakie.kim@sk.com, dan.j.williams@intel.com, Jonathan.Cameron@huawei.com, dave.jiang@intel.com, horen.chuang@linux.dev, hannes@cmpxchg.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-mm@kvack.org, kernel-team@meta.com, kernel_team@skhynix.com, 42.hyeyoo@gmail.com Subject: Re: [PATCH v4] Weighted Interleave Auto-tuning Message-ID: References: <20250128222332.3835931-1-joshua.hahnjy@gmail.com> <41ab5a11-f8d3-403c-9d68-33eb15aef8fa@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Stat-Signature: 6hn3utwsqzwnitkwrkt4hdcctnqdtnrt X-Rspamd-Queue-Id: BA8CF140002 X-Rspam-User: X-Rspamd-Server: rspam06 X-HE-Tag: 1738428841-108485 X-HE-Meta: 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 sWTxXGEu zkwHi8CLQrkrjEmqhd+HpPUwBNNwaH3BsODMWdfVmShMv0GOfGxB1ZnC4fg7GmQrr+MHVwTwPebljY5Avab3Un6dkTIPYZ5R6JQOr7f8eOCwU9P+cInFvgpW1Mm/1OBUSvaQuRfoDYqB7LEc2Hgm6IjQoF75/8HvzMTvLB+AZHlhcNKRqfkK+VBKGI9un4NP6pfP6UtXAnex7HA12ymhyW8KVcmSabijMTOjXLfx8KWZ9wwmvJlbgVEU8ZgMTHCiNGPoDA8ILibrdd77YlzFw47aNzOX83RAMTxJcgr9wILDrGAOOGaKJiRPDINDoOnv/OD6zaLrlmAe+/KlcldLNKKDemormmHfuLAUuREgX1vRxUFKMKXJH6MsyEMY6qzl2EsqmHTExVXsrldwT2C1t5Gr+6Q== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000300, 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 Sat, Feb 01, 2025 at 11:49:31AM -0500, Gregory Price wrote: > > 1. the auto mode set the weights as 10:5:1 for node{0-2}. > > 2. node2 is offlined, then recalculation makes it as 2:1 for node{0,1}. Point of clarification here: a hot-unplug event won't cause recalculation. What actually causes re-weight is hot-plug reporting new capacity. So in this scenario, the weight will remain the same for node2. > > 3. the auto sysfs interface is set to 0 to make it manual mode.