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From: Shakeel Butt To: Oliver Sang Cc: Qi Zheng , oe-lkp@lists.linux.dev, lkp@intel.com, linux-kernel@vger.kernel.org, Andrew Morton , David Carlier , Allen Pais , Axel Rasmussen , Baoquan He , Chengming Zhou , Chen Ridong , David Hildenbrand , Hamza Mahfooz , Harry Yoo , Hugh Dickins , Imran Khan , Johannes Weiner , Kamalesh Babulal , Lance Yang , Liam Howlett , Lorenzo Stoakes , Michal Hocko , Michal =?utf-8?Q?Koutn=C3=BD?= , Mike Rapoport , Muchun Song , Muchun Song , Nhat Pham , Roman Gushchin , Suren Baghdasaryan , Usama Arif , Vlastimil Babka , Wei Xu , Yosry Ahmed , Yuanchu Xie , Zi Yan , Usama Arif , cgroups@vger.kernel.org, linux-mm@kvack.org Subject: Re: [linus:master] [mm] 01b9da291c: stress-ng.switch.ops_per_sec 67.7% regression Message-ID: References: <93b7c3f206f158e7387cbb5f0bf5845b59b93053@linux.dev> <19693be6-7132-446e-b3fc-b7e9f56e5949@linux.dev> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Migadu-Flow: FLOW_OUT X-Rspamd-Server: rspam11 X-Rspamd-Queue-Id: 0712040005 X-Stat-Signature: fzpfiwu1tywk1by4ctwk73i6syw8xdbm X-Rspam-User: X-HE-Tag: 1779250384-396695 X-HE-Meta: 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 YLz9BaqE cU1pklJmBoElOfSxXLEuZ5d79xBDZZnY3KK4J/9eEgeFjMAUq4ZSBSs6zvqXYLcRzUH6spxJNqWdHSHuPgCpaqYYYTPecLiTMx3LCcKYiv8Fp2nU1TqdgvZtiW6ZGt6gcAYZ/oMHkqorp1pSUdVER+s4ToHb63eLJHvDaoBKuPTlrmvYUE/6BwrW0F2opb85Z5gUf1nxAfmBhRk5uV6Q0yzjbVMwFN8ILK9vUGu8R+/95vZqzLZwdoF/LjfKZZvCU1zMe7saMemaC4QwQkncRBVG9KA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, May 20, 2026 at 10:43:22AM +0800, Oliver Sang wrote: > hi, Shakeel, > > On Tue, May 19, 2026 at 07:22:52AM -0700, Shakeel Butt wrote: > > Hi Oliver, > > > > [...] > > > > > > > > > > > > > Also I am rethinking the approach, so I will send a prototype in response on > > > > > this email for which I will need your help in testing. > > > > > > > > Hi Oliver, can you please test the following patch? > > > > > > got it. will change to test following patch. and this looks quite different > > > with v2 or v3, so if you still want us to test v3, please let me know. thanks! > > > > > > > No need to test v3 as it is similar to v2. Please test the following patch as it > > is a direction I want to pursue and wanted an early signal if this is the right > > direction. > > FYI. in our tests, the following patch also recovers the regresion. > > Tested-by: kernel test robot Thanks a lot. I will send out the formal patch with your tested-by tag.