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AJvYcCUsz9iVFZ8uU2621X+JoTyyz1YBcXcJn22mAKnD7I+GZz0pR6/af5N3sN2brNhLND/YJlkiA8OyEGnPHb50yMvMkkM= X-Gm-Message-State: AOJu0Yw7/ylZ+byeAUuNnV1BFMPJSLPatiflM2S3MLUadF8LbQQWx3l4 WdizNTtsQ+AiITcxf52KVP0pQpVrW4lXIIES1cwG5OZMYAJEnFqbEcGXUHOS/KIzD8h3vB+58vm GBG5RYKIRHHLPwCaJGwS5NAxGc3WlQWLhGJY5 X-Google-Smtp-Source: AGHT+IEO2hDzsb7JZgkOy3SSJpcUo7AcmhmbVcZB9D8ZLb/iEgICdqvaoNFDl8Ja4olFYV1ZNcgAvovm39xOVF1n4t0= X-Received: by 2002:a05:622a:8014:b0:447:daca:4b25 with SMTP id d75a77b69052e-44acee81c74mr1902151cf.28.1720592599073; Tue, 09 Jul 2024 23:23:19 -0700 (PDT) MIME-Version: 1.0 References: <202407091001.1250ad4a-oliver.sang@intel.com> In-Reply-To: <202407091001.1250ad4a-oliver.sang@intel.com> From: Yu Zhao Date: Wed, 10 Jul 2024 00:22:40 -0600 Message-ID: Subject: Re: [linux-next:master] [mm/hugetlb_vmemmap] 875fa64577: vm-scalability.throughput -34.3% regression To: kernel test robot Cc: oe-lkp@lists.linux.dev, lkp@intel.com, Linux Memory Management List , Andrew Morton , Muchun Song , David Hildenbrand , Frank van der Linden , Matthew Wilcox , Peter Xu , Yang Shi , linux-kernel@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-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 3760116001F X-Stat-Signature: tt6uk57d1gnik4x61ramppn6zfsxhiks X-HE-Tag: 1720592600-110833 X-HE-Meta: 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 JElzzQ7F Z4sgnun9pU8OnsvN+uZTnZ05MUZAZ2vhO4N7XjRGVt3IbeSsF+yalNTMCe3pzHxpPUnWoYMhsNXPnJbsa78yDXIxfyLdyZkMyQ2VqSGdvfMxNc0zX8YXhlPyVZlKy25keRDoAF51QeTKOFbCHFBivByeTedW4b0KUB/FmX9ZiKQBUl9TByUT3odXpXn2fEYKbZFjHv5mNf3aNU7lJkCYuIAqUn59LoszMMRGxlj+FPPPrKJs= 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 Mon, Jul 8, 2024 at 11:11=E2=80=AFPM kernel test robot wrote: > > Hello, > > kernel test robot noticed a -34.3% regression of vm-scalability.throughpu= t on: > > > commit: 875fa64577da9bc8e9963ee14fef8433f20653e7 ("mm/hugetlb_vmemmap: fi= x race with speculative PFN walkers") This is likely caused by synchronize_rcu() wandering into the allocation path. I'll patch that up soon.