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[58.152.22.92]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-82a07343719sm4525615b3a.38.2026.03.12.20.51.30 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 12 Mar 2026 20:51:33 -0700 (PDT) Message-ID: Date: Fri, 13 Mar 2026 11:51:27 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] mm/mempolicy: add sysfs interface to override NUMA node bandwidth To: Gregory Price Cc: akpm@linux-foundation.org, david@kernel.org, dan.j.williams@intel.com, ying.huang@linux.alibaba.com, linux-mm@kvack.org, joshua.hahnjy@gmail.com, linux-kernel@vger.kernel.org, Jonathan.Cameron@huawei.com, linux-cxl@vger.kernel.org, dave.jiang@intel.com References: <20260312091207.2016518-1-seven.yi.lee@gmail.com> Content-Language: en-US From: Yee Li In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 8E75B100005 X-Stat-Signature: xnhiap95qipwka1hhnret3fotf57gtr9 X-Rspam-User: X-HE-Tag: 1773373895-339998 X-HE-Meta: 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 YlMIhOny 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Gregory, > If userland is setting the raw bandwidth stat, why can't they do a tiny > bit of math to figure out the preferred weighting and just write the > weights? We're not setting the raw bandwidth stat directly, but overriding the top-level bandwidth to observe the final effect. > Should be posted as [RFC] then, I don't think we want this upstream. Thanks for the suggestion.