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[173.79.60.52]) by smtp.gmail.com with ESMTPSA id af79cd13be357-93bb4eb5e59sm421092285a.1.2026.09.17.04.33.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Sep 2026 04:33:36 -0700 (PDT) Date: Thu, 17 Sep 2026 07:33:34 -0400 From: Gregory Price To: "David Hildenbrand (Arm)" Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, kernel-team@meta.com, akpm@linux-foundation.org, ziy@nvidia.com, matthew.brost@intel.com, joshua.hahnjy@gmail.com, rakie.kim@sk.com, byungchul@sk.com, ying.huang@linux.alibaba.com, apopple@nvidia.com, urezki@gmail.com, chenwandun@huawei.com Subject: Re: [PATCH 2/2] mm/mempolicy: stop copying the nodemask in the interleave paths Message-ID: References: <20260829015943.1258774-1-gourry@gourry.net> <20260829015943.1258774-3-gourry@gourry.net> <7eb8f4c0-6e14-4f91-a3b9-77e82f76ed00@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <7eb8f4c0-6e14-4f91-a3b9-77e82f76ed00@kernel.org> X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: 298B420009 X-Stat-Signature: puqyejkbm8homyq5xrh8d8itkj4ihuhu X-Rspam-User: X-HE-Tag: 1789644818-824889 X-HE-Meta: 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 3Xq1vzBN P2Dmy2B2Frs9opCFkY3c7lQMuF9R6U8MyC0pewSSqi1pkdAFIFvDldMPlSuzWMmOfAef8QMTG8lF6uzmf8U7xjJLCxfUBJWnEjLwknDkgx93s/yfzpM9RsMRdtZdDqsv225DQT5ZZRnsBjJ0Bu3IomZM4hxB4ocPd8WCYO+iCkgtbHf0kQQzFtnzwCjW3M/4vL9vDQT+4jWHogjKNMnU8M9vCjp78KffeRk1mbpKghLBZnlZBn1pmA2FLlS85A+jU0HfJ2GgtWfqg8I2jb8ZPpSmOyqKVmFBZ7EyFs5DABJ/zsklcFIuRmhXA9wmmW1btB2ClTXLcc9U47rd7GiRlL+aFb4MErc7HPx0zEp+Eu9oWnxcE8uOf/CsfirXL/uvRP19WpttcDkWofAFwwFaxCZFJkw== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, Sep 17, 2026 at 11:49:52AM +0200, David Hildenbrand (Arm) wrote: > > RCU stabilizes the weights and makes accessing them safe. RCU doesn't > > help us with the node bitmasks themselves (we were using a cpuset cookie > > to stabilize them to take a copy - but we're killin that here). > > Ah, my memory comes back. So confusing. > mempolicy is nothing if not confusing. > A resend is probably easiest when modifying the commit message. > ack, will spin it today.