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bh=gdQDOqyfil+DNkwzLkg7VF450RbTdgCc8NqtMW6uRW4=; b=exD/y7j999jCv6bS9IMXmr8sD3f5ooPKDx0FbXkjx8Zj/4jZp0LGdf83r48cRlz7csM4Ga 774RSGWxq23m0i77jv/+q1WYKBFSNoHeK0SHXnAycfz20MDDwCsouqDKIt0UomOqQW2JEt Ifm/vEMXWcO7DbLtSF415CnpmUT2oDJIBZ9e17a+9JOTcn0g0uIN9m0bLfNklQ8Xln2Xu6 LvEijg/kINBpfKtj9Zr2zSHXizNpjkYvM1MVykXCXlUGgNkpllZmDS64AXJTlju+wuK9M6 r6QIBEfXSaR7tiPshZakf/KZ37DzfOetx999jxpGfk44srLtQmtiUsi98BQykQ== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1764350564; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=gdQDOqyfil+DNkwzLkg7VF450RbTdgCc8NqtMW6uRW4=; b=M4CSl6gqnCuJP+oILiEsB+RMaQsPNdVWA8BsfnJdgpZXuMRB31+BAQu7VwjE/LRYhROu4e 95a+J06qa8kBsGCA== From: Sebastian Andrzej Siewior To: "Russell King (Oracle)" Cc: Xie Yuanbin , akpm@linux-foundation.org, arnd@arndb.de, brauner@kernel.org, david.laight@runbox.com, hch@lst.de, jack@suse.com, kuninori.morimoto.gx@renesas.com, liaohua4@huawei.com, lilinjie8@huawei.com, linux-arm-kernel@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, lorenzo.stoakes@oracle.com, marc.zyngier@arm.com, nico@fluxnic.net, pangliyuan1@huawei.com, pfalcato@suse.de, punitagrawal@gmail.com, rjw@rjwysocki.net, rppt@kernel.org, tony@atomide.com, vbabka@suse.cz, viro@zeniv.linux.org.uk, wangkefeng.wang@huawei.com, will@kernel.org, wozizhi@huaweicloud.com Subject: Re: [RFC PATCH v2 1/2] ARM/mm/fault: always goto bad_area when handling with page faults of kernel address Message-ID: <20251128172242.cCNBVf7H@linutronix.de> References: <20251127145127.qUXs_UAE@linutronix.de> <20251128022756.9973-1-xieyuanbin1@huawei.com> <20251128120359.Xc09qn1W@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: X-Rspamd-Server: rspam10 X-Rspamd-Queue-Id: 3D65C1C0004 X-Stat-Signature: tusr4i4hno8qejaimkucs7fzw35zyx9c X-Rspam-User: X-HE-Tag: 1764350567-972064 X-HE-Meta: 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 yRvGeLqQ gw/JBnp5x4aDJhsNs7FZ9KzW2E9BgZaPjqgcxDQoRoMP7ke9e2wO+V5S9kw30N+K3wnZaDdf+GPU5ML5LDE3+xONMKiHXCT39uhu+w92Diujs2tiw5OGWH/f4f/bHoq7ntTZzd73NJPXRrC/4cyUAXaZXjwAnCJfCTn2hZI6EunVuFP9Ltc9sm5fm2C4tqWvjyTzw/gO6gURt7H7eFwzlGx4CQWMYGdON16tZc1P4cmn239CHSTAevJFFrBNcNv2ObS63yT8PabjIdW8= 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 2025-11-28 17:01:18 [+0000], Russell King (Oracle) wrote: > > I hope Russell will add them once he gets to it. They got reviewed, I > > added them to the patch system. > > I'm not sure which patches you're talking about, but discussion is > still ongoing, so it would be greatly premature to merge anything. This thread https://lore.kernel.org/all/20251110145555.2555055-1-bigeasy@linutronix.de/ and the patches are 9459/1 to 9463/1 in your patch system. They address other issues, not this one. > https://lore.kernel.org/r/aSmUnZZATTn3JD7m@willie-the-truck > > There are now many threads each with their own discussion, which > makes it more difficult to work out which is the implementation that > should be merged. Clearly, not everyone knows about the other > discussion threads. So Will suggested to let change the handler and handle this case. The other patch is avoiding handling addr > TASK_SIZE. Any preferences from your side? Sebastian