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b=QKpWqi5JrQfOQROMv2OSoXTAaY7IRR3sO0WfuN1qvx1l2b0oHysMy4PHVXzw+V8Rr Brc0qkFTaSTrRE8sPsc+TWz6aiPQ8SLd687MoNACrxWKQ3qM+Bu7wpx5DRbwjRLbnC A93OT2JhcsDrBwwC7LzPA0McritfSWefHzc7a1loENR2MEi4uUZi+U4R/9cZwhGJzo 8AQJS7jL/xYrUW7rx/x+gB+nsuHYcCizs1eqt14X6rq6DJ0VnPv6tnNqoj8Pj1PTHJ E0PsLlxHputgytZLZP4n3mT5N0I1ZTN1kHM95ZbK0NSQAaCXsqJjHLnq2fvjtokAD4 +h0iN8Cvnz85A== Date: Sat, 27 Jun 2026 11:10:27 +0300 From: Mike Rapoport To: Gladyshev Ilya Cc: Linus Torvalds , Andrew Morton , ivgorbunov@me.com, Liam.Howlett@oracle.com, apopple@nvidia.com, artem.kuzin@huawei.com, baolin.wang@linux.alibaba.com, foxido@foxido.dev, harry.yoo@oracle.com, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lorenzo.stoakes@oracle.com, mhocko@suse.com, muchun.song@linux.dev, surenb@google.com, vbabka@suse.cz, yuzhao@google.com, ziy@nvidia.com, pfalcato@suse.de, kirill@shutemov.name Subject: Re: [PATCH v5 0/2] mm: improve folio refcount scalability Message-ID: References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: X-Rspamd-Server: rspam05 X-Rspamd-Queue-Id: 92AD140003 X-Rspam-User: X-Stat-Signature: h9f68ujnw8ifhq975t5agmwhr18nzhnp X-HE-Tag: 1782547838-857224 X-HE-Meta: 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 /ixMKXgt a7He+43DwTxsQ4sf2d74LjzUBxazon3QeBHlxLvE6b+oBYyDTd9mNR3fMyGhajJ6GNmeiq8/tZCJY72oqxOANJdnVrb4haQMDOB42a6c6NBtKa90upOf4DsY/G8yUMIvyazjwndIALi83UkDteqRnJ7HWeiYhz68cJ6r9z4R1YFlTlUFwYsMS9a/9MdhDy7jRVuB4spKx5/fee4oVLOLs7lmKexo70wammFH/fFeW0XqJuYv4WFjcveKwPbrCrkITj/UEEn4ZyOISdT2lcNgXycOyQQ== Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Fri, Jun 26, 2026 at 06:44:58PM +0000, Gladyshev Ilya wrote: > > This patch optimizes small file read performance and overall folio refcount > scalability by refactoring page_ref_add_unless [core of folio_try_get]. > This is alternative approach to previous attempts to fix small read > performance by avoiding refcount bumps [1][2]. Looks like memory-failure selftest is not happy: https://github.com/linux-mm/linux-mm/actions/runs/28259343162/job/83730467505 -- Sincerely yours, Mike.