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To: Zi Yan CC: , , , , Lorenzo Stoakes , Baolin Wang , "Liam R. Howlett" , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , "Matthew Wilcox (Oracle)" , Wei Yang , "Yang Shi" , , , , , References: <20251030014020.475659-1-ziy@nvidia.com> <20251030014020.475659-3-ziy@nvidia.com> From: Miaohe Lin Message-ID: <68910328-ba58-0554-c961-6a4087c72354@huawei.com> Date: Thu, 30 Oct 2025 20:15:54 +0800 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.6.0 MIME-Version: 1.0 In-Reply-To: <20251030014020.475659-3-ziy@nvidia.com> Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.173.125.37] X-ClientProxiedBy: kwepems200002.china.huawei.com (7.221.188.68) To kwepemq500010.china.huawei.com (7.202.194.235) X-Stat-Signature: zotftjxwisyg5rch8n3h4um3a4ri67gs X-Rspamd-Queue-Id: 96DF51C001A X-Rspamd-Server: rspam06 X-Rspam-User: X-HE-Tag: 1761826564-295040 X-HE-Meta: U2FsdGVkX19cjoZqiybJHzp+KVFGIReeUuwWh285YKoXQFgcfrmF2Jb0zds9xpfvydcuVGXesC2unexge6OBcDbgjdSDH7+fJLuW6QAtAVSGtbM2Ys3tH+zjhVdlC0HmzAo34yvSnwSNhwO/YD/I32+zGTDCV+Xdlv204PZCm49zEKWucKZ408HnvYkkcqnbzl+RA071zbKnXSAL10I+zCN6OYoNcXSP8Oj/Jd0PSq0YpMKr6k5ilpX1GAH+VG+Gb3vkX8MpF8kbcGrbRrMJ87i8ptk15gRgpn1Mm+a0OsYsN9qiafYbxBYCggFfvK/+BLkHF9+wUHw/DMQclb5H1MGwe0bLdo2awXiGL6myql6nsv4W15RcIvURizBKvlYc55+Nt1ksuQieddKhituv/jPBrSKj13z20pXX9Eux6POtesdW1aIExIoNtp17GkL6AJ91DVl5jBR0istzaHSZZtOEfgedk/hHkf3j3kJAo3k1+4oQHvLZiaugvFvHlf1sTYHKDJtqI+PL1AmLmbxp7ThOBhoDDahY7X9413LsS3xprIaQN4aLw/FHrDfasqIghnQex/7kSr9tVCnaE1L68auBQ386C3WJQ9s+bNmzykZQnG++HReDzmZwIpaW1FP3xDhoamBkN83kT/3FvbD9MlbZq8HJXEPWoAyAID2Fl0NbgogUDzWthR8zY6GGL4oDYzYiU0JctNBAWV7sLhhVqudFuELS53Iwt1+gmjwaLcSpkUX5PFPIzUxjxj+BBNJC68mTJ0rfZrIrJS7+1rXytK66atHWG3997P+MBRX2+kJO3O5ME08VbgKWx8yQ7yb7K/60yN+OmLAUXEv38nYxPZRFreaqaZ/g81n8HxaZuyVpUGemzoy+Fs6/bhZjrMmLmRbab5HsVm9WXh3bZDoo5rqhG/yfdBfcxKTm+DdQyjrMr3lhBu67ESQ14cpHS7M2+O581co3JJM8fto58cZ j22AkmL1 o1weqr+IxRTdF1FFq0LxrJbi6/w== 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 2025/10/30 9:40, Zi Yan wrote: > Large block size (LBS) folios cannot be split to order-0 folios but > min_order_for_folio(). Current split fails directly, but that is not > optimal. Split the folio to min_order_for_folio(), so that, after split, > only the folio containing the poisoned page becomes unusable instead. > > For soft offline, do not split the large folio if its min_order_for_folio() > is not 0. Since the folio is still accessible from userspace and premature > split might lead to potential performance loss. > > Suggested-by: Jane Chu > Signed-off-by: Zi Yan > Reviewed-by: Luis Chamberlain > Reviewed-by: Lorenzo Stoakes Reviewed-by: Miaohe Lin Thanks. .