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Tue, 25 Feb 2020 12:18:52 +0000 (UTC) Subject: Re: [PATCH bpf-next v2 2/5] bpftool: Make probes which emit dmesg warnings optional To: Alexei Starovoitov , Quentin Monnet Cc: bpf@vger.kernel.org, Alexei Starovoitov , Daniel Borkmann , Martin KaFai Lau , Song Liu , Yonghong Song , Andrii Nakryiko , Jakub Kicinski , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, Shuah Khan , "open list:KERNEL SELFTEST FRAMEWORK" References: <20200221031702.25292-1-mrostecki@opensuse.org> <20200221031702.25292-3-mrostecki@opensuse.org> <7ab56bb6-0ddb-2c3c-d116-fc01feddba5e@isovalent.com> <20200221224428.plbxav3scv6og6kv@ast-mbp> From: Michal Rostecki Autocrypt: addr=mrostecki@opensuse.org; keydata= mQINBF4whosBEADQd45MN9lBl17sx48EAAfyrc6sVtmf/qyqsQgpJnuLGQTbSdI2Nckz0w04 YbGCGI0giMkBgJTEDB8+Or+DZtaa4MmnqMuivI9wWMJzf3IidAZOe262/blNjsTqITzoCJ48 MLufgrv3XkEZPEaeOEEswZ/PaemQIgW3Jn1K6IYfg9mXA1+Sn42Ikj7c41r30pnCTVDlhcyS kMtt5Gs1u9yOkc8LFEo4w3F02SfFJ4t1ar04xY+znRwSDZh4xFVyradaP37mTDL/cAj94jEi 44YzL22x6fAVRwH3wYLw49YnBK3j1uvys+DPqaOFJnQwfH3AA++tmOFYnJkC1s+E4mpcSIsn H/jRznlv7SPttTRfsaJL0Gk9tHaIUI4o1kLkfMOV0QDJ4xBOCeOfjBQwcDAeiVQXtMnx4XkB tmifSwFGlOTsEa0Mti7TlWrAPWBF5xEnG5tCuKaaLnyb4vu+gbV3r0TgI+BNv3ii+2nMFYWd u49pV23pck61oJ43hR1WOZUWIyLvTTQveaYRzbfcG7wbR/C2NIuAtEf8wxBv1aRI/vDCZSjV TK8Zh1pBdk+UsgC310ny4hcVYR1uwapJts2A+Q/rUMlsC6CAJwD916zAIAhaeNLOPYmb46Mw 96AhRclvV5TW929X/vCe1iczDdfSyYkU41RJGTUSBfSQXMVomQARAQABtChNaWNoYWwgUm9z dGVja2kgPG1yb3N0ZWNraUBvcGVuc3VzZS5vcmc+iQJUBBMBCAA+FiEE/xPU917HlqMFVtFM 7/hds1JJaVUFAl4whosCGwMFCQHgwSUFCwkIBwIGFQoJCAsCBBYCAwECHgECF4AACgkQ7/hd s1JJaVWoyRAApCxV1shTrcIwO8ejZwr0NeZ2EBODcbJULgtjZCaCZp8ABzzUAB8uZCmxCDdL PEDlZgWW8Pm0SkS5jyJZ4AI1OQNtX6m/gy7fFCpr1MIZoHsVuzYHswxzZhcDGbTXrkcmLygD dTikyLEKAeCGMU6pbGrHfhzIRGasII1PqSO43XZYEKGPC3YgEIyx/tuL8bX3z/TxPp52oOjp Q3bmJEIWEzz5v/46WE4Dj3s0aKTDY6zBoYGRehSuqaBRVEIR7Y7HBMtcPwK5S1VflG38B5wh QuwRlz7Uuy48o0vsdnSMjuJoPZ4tmg056d0cmSse2NBfN+FPVrEw1L84jdijCBqLRam6tXuU 4Npszr2Z6/OBu6gkn9FqSNP8nLwnvnEJ5300epRZ4kzJgtUhMz0743fE21bzNxJB4xdMcOjV /yucMfwbgp3dD84A3N8jPaWCsLNuRsxjoAk6OKFz+WtHxT8m8ValYI4sn9PRhzTDTtnGlC/P Sem/CIseMXNYxT6mJsXkjZi757/RM3JabNZ/N0gMiquVYAapxrxv2qiMDPHByZZd+yOsBk4X FgfWwhOwW5g2qxXZ2mtMD4gAcDLj6x4QVf6mf6k4nPWgnOyZG7yrxu96R4jKN+kO6UAQ3RC+ FnCxz92QefeV0rYtF+DWy/5GElQowD+wVxZDUJgwki4SjVO5Ag0EXjCGiwEQAMSNQ0O2g4no bi5T/eOhfVN6dzwr5nestMluQy4Xab1D2+vv4WcoIcxxj48pMSicNgbzHtoFKOALQEptuKwE tipiOchCtCi6atpFC0hiy+eogaxC6sysvJ0MwBWk0spWXsPQRxIy/zWQaG0NLRNXOYhupgxZ TN3008FsriFu/V0mQnF58w+Y8ZbpfaFUEJn4KoYtJEsjezYIAdQUDtohSrUzeK7KHGeBuePf XyIsZZKRaMoYbAguE3WDLcqWPBLGH0ra5O+IkqoStc6FpyyvoNLAHTtJNfYfbpXpBjrl/x2n hQqohQrH7+t8lDe4B6EPSHdSV9qY5l0p0y17nXY3ghQs/hqH6aw6MB52KtydKs/3dl9rxW61 6McUUQGy6Z0H2MnV1KqiLvNx5abfOcbUGMZPwHYqPU4zoOQhbWN34q2AuK4lEY5nbmgwI92m PFE5S5A2YPi2pFzVxhWUWFfX1AHWQ2NMudiYljFgCsp9sJLI+UCb8fNyDWD72e5QqKzBSLf/ z94NICpqBGX9Z4+uF0dmPZlJTilgFU3jEUuth5NiTm1qQBUqAHUAgZhGIqVWpECHFKaIMUxv Xj6bvOCrCR0PfWxalS3RJT7z4OsETAG7QT4yOlqOhP5uue3I6WnzaQPZU0Gp9+vyQpuCVPdl HbK2kx9hg5imRgmZLOKyjdhbABEBAAGJAjwEGAEIACYWIQT/E9T3XseWowVW0Uzv+F2zUklp VQUCXjCGiwIbDAUJAeDBJQAKCRDv+F2zUklpVaFiEACHVCJJPXenIc5C4zkuu1pn0dmouoZV LWEyk3zjcC7wVJ/RGr4apLKU0hAfp9O12/s4mxa3lzZ9EvaWUY7NwwYx4kCmVcsq2+a6NVNI nkKUqPvj8sXd9dHWk283hDwrQrL7QPysr767TrLcXQ2l8o19q02lN/D7Jte37td8JMrsErEF B0Q31D+HWnn1rFJCeCn5/vwHgDW8wWtYYisv/EmUf7ppP9teiNtrQinyljTUMsb1hiy2HkhL qEOR7Q/NVk1yDC+oyQ08Zvt9LkELo3fPoeXX8RlbCUA36zq+3HsHggI6XJNmYDSS+l7N5r9B GEGFgLvCFJMP6nNX16nkvpYflxIzlmAAWQUR8K/VGvW8YgfRJBVw7+AhCe7mXubIbTa9IrJs QR74gvfGuJWrWq0ZtOzS5cKxos0rF2VON2rig5+5lf9A1UP1ZH0nfVCx5iXuJ1O1ld6tXHpD qRunpTuuKg3wkHCAS4oC/ECFHV8JukpgEuR7CNvBbYyjc7BFImmOe0bGbbntFnU173ehj0A0 hjrs3VY5x7TDedJwEr5iMKzvI4NlXNQEjDEltBN88gMvtFo6w8W/bbe6OalIEfs42DS+5KIg X91a5VRZRQo853ef/YjTRCZkGhUJ9A5uCLodR14o+C2Lzc3EmJ89awrqiAirZWPuZHCfud+f ZURUUA== Message-ID: Date: Tue, 25 Feb 2020 13:18:51 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 MIME-Version: 1.0 In-Reply-To: <20200221224428.plbxav3scv6og6kv@ast-mbp> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kselftest-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org On 2/21/20 11:44 PM, Alexei Starovoitov wrote: > On Fri, Feb 21, 2020 at 11:28:05AM +0000, Quentin Monnet wrote: >> >> "trace" sounds too generic. If filters are applied again to prog and map >> types in the future (as you had in v1), this would catch tracepoint and >> raw_tracepoint program types and stack_trace map type. Or if new helpers >> with "trace" in their name are added, we skip them too. Can we use something >> more specific, probably "trace_printk"? > > +1 > >> Thanks for the patch! While I understand you want to keep the changes you >> have done to use regex, I do not really think they bring much in this >> version of the patch. As we only want to filter out two specific helpers, it >> seems to me that it would be much simpler to just compare helper names >> instead of introducing regular expressions that are not used otherwise. What >> do you think? > > +1 > I was thinking the same. > Or filter by specific integer id of the helper. > I like the idea of filtering by id. I will do that in v3. Thanks for review!