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From: Shakeel Butt To: kernel test robot 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: <202605121641.b6a60cb0-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <202605121641.b6a60cb0-lkp@intel.com> X-Migadu-Flow: FLOW_OUT X-Rspam-User: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: F2B6CC0010 X-Stat-Signature: toup6563y414hqczaiq8zqg1xh9t31fb X-HE-Tag: 1778601849-422048 X-HE-Meta: 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 Jf4PLsY0 ZmqFnwryRNxuHLQ96hD0pb7A99DZyx0i1pz0sR81/5sdCpLoHcLGcgP9uwxZotSeXZ9FSKueGuBY+OMSd45q7xeLF0wfrtfw/MhjvThYLyHb9Y427ELCUiAwJmpZPsBWkhW3+Vlxp73DuJfZGBJojLyCX14BOqEjD+kPxj+JKv4Rsri2DdgCENlZccpWk0IkzPFYOYv60MjZp3HGhOQ9oCN2CLhvgj4lAHJ1qLlNLxZZpbLgBW38hufFjpElY4huh/FFWgjy/QNMK1GDrZlR/n523xA== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, May 12, 2026 at 08:56:52PM +0800, kernel test robot wrote: > > > Hello, > > kernel test robot noticed a 67.7% regression of stress-ng.switch.ops_per_sec on: > > > commit: 01b9da291c4969354807b52956f4aae1f41b4924 ("mm: memcontrol: convert objcg to be per-memcg per-node type") > https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master This is most probably due to shuffling of struct mem_cgroup and struct mem_cgroup_per_node members. I will try to reproduce and will followup on this.