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Thu, 21 May 2026 02:42:54 -0700 (PDT) Received: from localhost ([2a03:2880:10ff:71::]) by smtp.gmail.com with ESMTPSA id 006d021491bc7-69d77385a8esm199938eaf.11.2026.05.21.02.42.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 21 May 2026 02:42:52 -0700 (PDT) Mime-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=UTF-8 Date: Thu, 21 May 2026 02:42:50 -0700 Message-Id: Subject: Re: [PATCH 2/8] bpf: Recover arena kernel faults with scratch page From: "Alexei Starovoitov" To: "Tejun Heo" , "David Vernet" , "Andrea Righi" , "Changwoo Min" , "Alexei Starovoitov" , "Andrii Nakryiko" , "Daniel Borkmann" , "Martin KaFai Lau" , "Kumar Kartikeya Dwivedi" Cc: "Peter Zijlstra" , "Catalin Marinas" , "Will Deacon" , "Thomas Gleixner" , "Ingo Molnar" , "Borislav Petkov" , "Dave Hansen" , "Andrew Morton" , "David Hildenbrand" , "Mike Rapoport" , "Emil Tsalapatis" , , , , , , X-Mailer: aerc References: <20260520235052.4180316-1-tj@kernel.org> <20260520235052.4180316-3-tj@kernel.org> In-Reply-To: <20260520235052.4180316-3-tj@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260521_024255_299638_6B1BE91F X-CRM114-Status: GOOD ( 11.15 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed May 20, 2026 at 4:50 PM PDT, Tejun Heo wrote: > > v2: Use ptep_get_and_clear() in apply_range_clear_cb(). (David) > > Suggested-by: Alexei Starovoitov > Signed-off-by: Kumar Kartikeya Dwivedi > Signed-off-by: Tejun Heo > Cc: David Hildenbrand > --- > Documentation/bpf/kfuncs.rst | 14 +++ > arch/arm64/mm/fault.c | 10 +- > arch/x86/mm/fault.c | 12 ++- > include/linux/bpf.h | 1 + > include/linux/bpf_defs.h | 11 +++ > kernel/bpf/arena.c | 177 +++++++++++++++++++++++++++-------- > kernel/bpf/core.c | 5 + > 7 files changed, 183 insertions(+), 47 deletions(-) > create mode 100644 include/linux/bpf_defs.h First 5 patches lgtm. Should we create a stable branch out of them and pull into bpf-next and sched-ext trees? I'm preparing a followup for slab-over-arena on top of these changes.