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bh=kYGKAj2xAj555OyRv7oGeaV9NhDplyzodb6JVG3dTNE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=mirWSre2oS/yKU/0TYsx/iyO6QIDXW0mlBG5mZSeQ7nFUa2elyhehZyXzCqymTA+u nTOzpU09GVgTd5QK31zyTDs3Q4YyRL0/8xBV7e82N43CsS6BO3s6bogKxZpIeBafh7 +L+JnzdTNNt3otCIxoLkOVUaj+cniyyO46hxNWj7L7S2AT/s7SErpQxNACSRd5LVLj tUElhpZLyq8aDrj3UHPReli9pSqXY4EyfzAsXZWnIh4kES/psFdWNPKi1wvQPww2hF pHrHoYQmGQE+Ip2FWuUM0CUSW7lXMMl828bg4slNJw+doA+RTi2V/0hTHMP7JMvW+5 kV88U6Y3bXVMQ== From: Will Deacon To: glider@google.com, akpm@linux-foundation.org, robin.murphy@arm.com, james.morse@arm.com, elver@google.com, jianyong.wu@arm.com, catalin.marinas@arm.com, wangkefeng.wang@huawei.com, Zhenhua Huang , mark.rutland@arm.com, dvyukov@google.com Cc: kernel-team@android.com, Will Deacon , linux-arm-kernel@lists.infradead.org, quic_guptap@quicinc.com, quic_pkondeti@quicinc.com, quic_tingweiz@quicinc.com, kasan-dev@googlegroups.com, linux-mm@kvack.org Subject: Re: [PATCH v12] mm,kfence: decouple kfence from page granularity mapping judgement Date: Mon, 27 Mar 2023 17:29:53 +0100 Message-Id: <167993012079.2285233.18016244231691896258.b4-ty@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <1679066974-690-1-git-send-email-quic_zhenhuah@quicinc.com> References: <1679066974-690-1-git-send-email-quic_zhenhuah@quicinc.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: E50E8180024 X-Stat-Signature: ro57dczfbd5nt3pm8tz6itpaj4zdoaim X-HE-Tag: 1679934607-500736 X-HE-Meta: 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 PyYswnk2 Z56sL9sRP6FIeiNIGnoYx6oZlfXSCsUMzwQHwCw0bz6kQP8kCA4bpuNeT3iq0gVmWFfwD1gtAU4GkprzjDJz5dJmB8/B2PSjuCuD0aJOChfYAtH8TbyNOji30LpHz+2j9yR3mDp0N8oXIrZ33AnrIuOKoTNwFvDE/P4GtaGhbGqQa9fspcJ+q+OY4nrmwvHcU6tZ1CWpxk1kOc5g= 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: On Fri, 17 Mar 2023 23:29:34 +0800, Zhenhua Huang wrote: > Kfence only needs its pool to be mapped as page granularity, if it is > inited early. Previous judgement was a bit over protected. From [1], Mark > suggested to "just map the KFENCE region a page granularity". So I > decouple it from judgement and do page granularity mapping for kfence > pool only. Need to be noticed that late init of kfence pool still requires > page granularity mapping. > > [...] Applied to arm64 (for-next/mm), thanks! [1/1] mm,kfence: decouple kfence from page granularity mapping judgement https://git.kernel.org/arm64/c/bfa7965b33ab Cheers, -- Will https://fixes.arm64.dev https://next.arm64.dev https://will.arm64.dev