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[176.36.0.241]) by smtp.gmail.com with ESMTPSA id s7-20020a05640217c700b005602346c3f5sm3061213edy.79.2024.02.12.12.21.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 12 Feb 2024 12:21:33 -0800 (PST) Message-ID: <76ec9b657e4a16ad29b928114fbc207318c6e53b.camel@gmail.com> Subject: Re: [PATCH v2 bpf-next 12/20] libbpf: Add support for bpf_arena. From: Eduard Zingerman To: Alexei Starovoitov Cc: bpf , Daniel Borkmann , Andrii Nakryiko , Kumar Kartikeya Dwivedi , Tejun Heo , Barret Rhoden , Johannes Weiner , Lorenzo Stoakes , Andrew Morton , Uladzislau Rezki , Christoph Hellwig , linux-mm , Kernel Team Date: Mon, 12 Feb 2024 22:21:27 +0200 In-Reply-To: References: <20240209040608.98927-1-alexei.starovoitov@gmail.com> <20240209040608.98927-13-alexei.starovoitov@gmail.com> <59623808ebfd5ecd48cdb4c07a28326d777e7769.camel@gmail.com> Autocrypt: addr=eddyz87@gmail.com; prefer-encrypt=mutual; keydata=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 A+T7mluw nYzhLWGcczc6J71q1Dje0l5vIPaSFOgwmWD4DA+WvuxM/shH4rtWeodbv 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 IYKvsh7s t1iq+gsfnXbPz5AnS598ScZI1oP7OrPSFJkt/z4acEbOQDQs8aUqrd46PV jsdqGvKnXZxzylux29UTNby4jTlz9pNJM+wPrDRmGfchLDUmf6CffaUYCbu4FiId+9+dcTCDvxbABRy1C3OJ8QY7cxfJ+pEZW18fRJ0XCl/fiV/ecAOfB3HsqgTzAn555h0rkFgay0hAvMU/mAW/CFNSIxV397zm749ZNLA0L2dMy1AKuOqH+/B+/ImBfJMDjmdyJQ8WU/OFRuGLdqOd2oZrA1iuPIa+yUYyZkaZfz/emQwpIL1+Q4p1R/OplA4yc301AqruXXUcVDbEB+joHW3hy5FwK5t5OwTKatrSJBkydSF9zdXy98fYzGniRyRA65P0Ix/8J3BYB4edY2/w0Ip/mdYsYQljBY0A== Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.50.3 MIME-Version: 1.0 X-Rspamd-Server: rspam09 X-Rspamd-Queue-Id: 76030180023 X-Stat-Signature: 6w4gnhone1hg37gbj86iyci3tfs64spk X-Rspam-User: X-HE-Tag: 1707769296-946694 X-HE-Meta: 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 umpWbU7h 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 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 Mon, 2024-02-12 at 12:14 -0800, Alexei Starovoitov wrote: [...] > It doesn't and doesn't work for ringbuf either. > I guess we can add a filter by map type, but I'm not sure > how big this can of worms (extra checks) will be. > There are probably many libbpf apis that can be misused. > Like bpf_map__set_type() Right, probably such extra checks should be a subject of a different patch-set (if any).