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[173.79.56.208]) by smtp.gmail.com with ESMTPSA id 6a1803df08f44-6e8f707c5dcsm73466146d6.3.2025.03.11.08.52.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 Mar 2025 08:52:30 -0700 (PDT) Date: Tue, 11 Mar 2025 11:52:27 -0400 From: Gregory Price To: Yunjeong Mun Cc: kernel_team@skhynix.com, Joshua Hahn , harry.yoo@oracle.com, ying.huang@linux.alibaba.com, gregkh@linuxfoundation.org, rakie.kim@sk.com, akpm@linux-foundation.org, rafael@kernel.org, lenb@kernel.org, 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, Honggyu Kim Subject: Re: [PATCH 2/2 v6] mm/mempolicy: Don't create weight sysfs for memoryless nodes Message-ID: References: <20250311095151.446-1-yunjeong.mun@sk.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250311095151.446-1-yunjeong.mun@sk.com> X-Rspamd-Server: rspam12 X-Rspam-User: X-Rspamd-Queue-Id: EE2E220017 X-Stat-Signature: ua55y3zyyqh6ammgz6t8tmh8mx1izsj3 X-HE-Tag: 1741708352-39965 X-HE-Meta: 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 fzJYYCgc Q4SWvum2zomNJWVslWBOV7X8ls5PS/5cP+/Lb69cIwKBXHLfqPj/RrY5odJC+02w5+tyJ4PC7c+yvg9Bj6o0edoshJztXo1Z5QHzuHH9JoLjaJFF4xQ+GKbOq8nPino+37pt+a7KQsfx2VfdCRzXN2hMcVuy9ugOZi1+LC+HUNtCbaG8LIDg23O7rEAc7YCa8RIQsWZG3yK30X+w3Bk96y46qG9fAGjz9S8ocCSp7Jx0dOy8YTy6lYZK0Msk7fKKu6o8XtTVRxCUeVes+Etvhs/vXmLOGlSg5mBMpiUijSI5D46CIPjFkZXSIif27D48A0jQ/DsZOvlG9ph8j1WkHuie3nPLXyI4PwmLAV8nVBBbKFoUkeXFAwUjg/UYeE4jSMVLSymzQ5HkbRNeiF/MiXWxaSw== X-Bogosity: Ham, tests=bogofilter, spamicity=0.024698, 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 Tue, Mar 11, 2025 at 06:51:45PM +0900, Yunjeong Mun wrote: > Hi Gregory, thanks for kind explanation. > > We believe our propsed hot plug patch should be added as a hot-fix to v6.14, > because it can be addressed independently of auto-configuring feature. > Rakie will send v2 patch soon. > I think having the answer to at least the following question documented is needed. I'll wait for v2 to do another review. > > 2) We need to clearly define what the weight of a node will be when > > in manual mode and a node goes (memory -> no memory -> memory) > > a) does it retain it's old, manually set weight? > > b) does it revert to 1? > > ~Gregory