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Wed, 19 Feb 2025 14:04:41 +0800 Message-ID: <3437892f-60ed-4e76-9028-7feac46425e4@linux.alibaba.com> Date: Wed, 19 Feb 2025 14:04:39 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 0/5] mm/hwpoison: Fix regressions in memory failure handling To: "Luck, Tony" , Borislav Petkov Cc: "nao.horiguchi@gmail.com" , "tglx@linutronix.de" , "mingo@redhat.com" , "dave.hansen@linux.intel.com" , "x86@kernel.org" , "hpa@zytor.com" , "linmiaohe@huawei.com" , "akpm@linux-foundation.org" , "peterz@infradead.org" , "jpoimboe@kernel.org" , "linux-edac@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , "baolin.wang@linux.alibaba.com" , "tianruidong@linux.alibaba.com" References: <20250217063335.22257-1-xueshuai@linux.alibaba.com> <20250218082727.GCZ7REb7OG6NTAY-V-@fat_crate.local> <7393bcfb-fe94-4967-b664-f32da19ae5f9@linux.alibaba.com> <20250218122417.GHZ7R78fPm32jKYUlx@fat_crate.local> <02164ab7-c65b-4b2e-8686-5539bdcb8f43@linux.alibaba.com> From: Shuai Xue In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Queue-Id: 4DBFAC0004 X-Rspamd-Server: rspam07 X-Stat-Signature: zmybizwkpmb54gnyeo4m88ca1phd5qde X-HE-Tag: 1739945085-715593 X-HE-Meta: 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 JIEJW9Qi aM4rs3v5Javkg57Ebxct3BiTF9cEPa6CVxkWRRb42MFMFdcTPw4WK5kppGTgXEJTs6quHl/cyUAOUQPkh/NgbiDRftsfTXhuqbxZWfU5zpZdI9fK3IgQAx+H9Gtta59HCMeF4BZ0prdZAVsed/yhTE216FjtIU+02164/Og9zL/n0vS2CEf5ukTt/6Ri6xGJikRRxXkuEMQJZ2xlEQ9JFF/rVJIF+6m6g/HXW053SBOWieoO+KG0QdZygXIBdWX3X8yFNZnH2+1dteRuqaBnfH4MYst4ZFVY4Pi3ET5QJ2vpXgkBZ1YQQmIPzdspVGrzA/S5wdvxsfU1ibdsgfFdG778ZM8PcpBQXbxR4I3vUpAc7HU9clTvv//c3iADakPIWpbdlac+YZV8/tK8= X-Bogosity: Ham, tests=bogofilter, spamicity=0.120086, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 在 2025/2/19 01:59, Luck, Tony 写道: >>> What do futexes have to do with copying user memory? >> >> Return -EFAULT to userspace. > > Missed this bit. Kernel code for futex does a get_user() to read the > value of the futex from user memory. > > -Tony > > Tony, you saved me. Thanks. Shuai