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AJvYcCXdz3vs2Q2imkylyxpjPISefWXjaydw9SpcvP1UHBZanwL+naYfm9+Fxwj7Dm7Pbr5of18RqFi7ve+i3puYog1FOlQ= X-Gm-Message-State: AOJu0Yyz1JADAplL+CEw3BjAox8dQPSLJGBTjQh5IcloVxLmH4U+laLX MWLxQwsSq11/6FylqVHEMjsDIFmUMSOKlxT9q4XkzhEWwBHPm1nwhz0pZUHEbsWUPgvPsK9l5Aw y44BlhBaD6QXLqjtEKKtv3va/kTmQeolILQw/ X-Google-Smtp-Source: AGHT+IEWStsd+KuxNepFd6UjRKG3y6uqHDKx4qToLv/yDVLnXEdxCtDa1KZ552hONjDNbgT/EWoqQw24FByBD1VHdPI= X-Received: by 2002:a17:906:714a:b0:a5a:8ac4:3c4c with SMTP id a640c23a62f3a-a5a8ac43e15mr774938666b.68.1715989147046; Fri, 17 May 2024 16:39:07 -0700 (PDT) MIME-Version: 1.0 References: <202405171353.b56b845-oliver.sang@intel.com> In-Reply-To: <202405171353.b56b845-oliver.sang@intel.com> From: Yosry Ahmed Date: Fri, 17 May 2024 16:38:28 -0700 Message-ID: Subject: Re: [linux-next:master] [memcg] 70a64b7919: will-it-scale.per_process_ops -11.9% regression To: kernel test robot Cc: Shakeel Butt , oe-lkp@lists.linux.dev, lkp@intel.com, Linux Memory Management List , Andrew Morton , "T.J. Mercier" , Roman Gushchin , Johannes Weiner , Michal Hocko , Muchun Song , cgroups@vger.kernel.org, ying.huang@intel.com, feng.tang@intel.com, fengwei.yin@intel.com Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Stat-Signature: h5gf57ci8rz3uyh9uw8qxpfgnrp6each X-Rspamd-Queue-Id: E71AF40015 X-Rspam-User: X-Rspamd-Server: rspam01 X-HE-Tag: 1715989148-534879 X-HE-Meta: U2FsdGVkX18CTYFqBeRNcpKvlQ/iVkHjBTL7JgML3JoOI0a9NQjJIPEvucr7tgjzSGV+nhYiFxEH1JZPYOfAns2cyas7+SX2w/NIT1WxbgWdxSPG+lSXlqk7Z9is3umHbq8heza6FHWPQch0kmbsVWqUjh3E2AJRqIhS1za49bspWZxVrw3gknxDZxBh7Wx0YTEX/T+3b3MxJJ5kh5kL10iReiOPodVefN6APczuW9rj/N8AZSuGxm4S3G4dWJ0Hx/2Gklf8Y4w5i/ybQhU0BYTUPxpLg3V1Hj2vP5GDO/bJGpmrGj7SIwuqlnHR7l+KzlMPEjyNgzd724i4+oY4QH52P3ULJ6kraGcJMQx9tuj00d73vY7vJ1xnF6OWEnMYecpRO0qZmAQSYKuPCK/thIe5JBy9nF9hGo9/uE5TeCWsEeMtpzCOOgK3YXVPLpxW0Vl/7X5u5Zdjp4E3amV9FMguWKe8lznlFjPqKndywasUbuSr2D8hI6sHRGSNt+LwNBaCtbVfJ34Mu+inYKIJyrNKh+A1CWpiiaSv6klCG0oV55s1UDGDAwIIhPflRl/85DPMoh1lhBa/zh80pse5Vbvmvgy4Dz8Go6hJM2GZnHI8O8/fFXtGoSlzuHLg4/SYjrUTmuFJHzOy6O9cOSBuqzUxFNepL4zb1J6+bgmw8qVsrQfYsKfLrj7eU5C+hKFewR1r93NVWZOUxaw7ENEyZNFCtaM1A6tEN1n2zC/TfcY0JvkiP7RBsAhjptFmLcvEMUxyS2iwJNt2Dz5Ocs01KG3x6DSfDOCfdRo2as1IYXJGoytzg7bU2imvBKBjxspcxmOQ6fQqYbSjiiveeLd4j5bNl8KKIXyrwYcfdSrpNzB1DlD3BBVgwXfJwe5lPCqWkop5/oRgl9x+AZLl/78TIQ/wOmbF5nh/4CCIMuPRNvlCKGxHWhqsok5eCO91Rja657gZjrQbbmun07P5hkF bjoIfkRM JLavPSArNkqtNUCV+6zX2AtKF2bzSOaj6yqiDDRgGdVpSPu/i9nMJhiuCFirqgxEITTGKnVarhzi+lEmXXz7RQozmpiJHe2Dnu6y8/lvfl6hXx0jjsPIFx3TSrMe4jlR3bgBcgdHe92iLDwerZ8AujgAnlvZyFA6vWw3uoI5iEh92LCOjmZ/5BRWOkUJTUPdAjEq2MldeNi3r3cVtAQU5AAxdRaG5MeSTGWujKignzYRvXuNHu/K3itj5g1X6HcOyLq/CNSH31ncFnSh6oa3F8WRVq3l4oELP1+s5CpFyGzd7x/79RxxSU2rJC8icdqZHjhHQ/D37k8745F9NRSzWXfeDlif2frH9gYF2 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, 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 Thu, May 16, 2024 at 10:56=E2=80=AFPM kernel test robot wrote: > > > > Hello, > > kernel test robot noticed a -11.9% regression of will-it-scale.per_proces= s_ops on: > > > commit: 70a64b7919cbd6c12306051ff2825839a9d65605 ("memcg: dynamically all= ocate lruvec_stats") > https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master I think we may want to go back to the approach of reordering the indices to separate memcg and non-memcg stats. If we really want to conserve the order in which the stats are exported to userspace, we can use a translation table on the read path instead of the update path.