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[185.219.167.242]) by smtp.gmail.com with ESMTPSA id o18-v6sm563324wrp.31.2018.11.07.03.14.01 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 07 Nov 2018 03:14:01 -0800 (PST) Subject: Re: multiplexing /dev/console to all console= entries To: Dusty Mabe , Greg Kroah-Hartman Cc: linux-kernel@vger.kernel.org References: <46b26403-395b-6a3c-ea6e-c3c811fdc400@dustymabe.com> From: Jiri Slaby Openpgp: preference=signencrypt Autocrypt: addr=jslaby@suse.cz; prefer-encrypt=mutual; keydata= xsFNBE6S54YBEACzzjLwDUbU5elY4GTg/NdotjA0jyyJtYI86wdKraekbNE0bC4zV+ryvH4j rrcDwGs6tFVrAHvdHeIdI07s1iIx5R/ndcHwt4fvI8CL5PzPmn5J+h0WERR5rFprRh6axhOk rSD5CwQl19fm4AJCS6A9GJtOoiLpWn2/IbogPc71jQVrupZYYx51rAaHZ0D2KYK/uhfc6neJ i0WqPlbtIlIrpvWxckucNu6ZwXjFY0f3qIRg3Vqh5QxPkojGsq9tXVFVLEkSVz6FoqCHrUTx wr+aw6qqQVgvT/McQtsI0S66uIkQjzPUrgAEtWUv76rM4ekqL9stHyvTGw0Fjsualwb0Gwdx ReTZzMgheAyoy/umIOKrSEpWouVoBt5FFSZUyjuDdlPPYyPav+hpI6ggmCTld3u2hyiHji2H cDpcLM2LMhlHBipu80s9anNeZhCANDhbC5E+NZmuwgzHBcan8WC7xsPXPaiZSIm7TKaVoOcL 9tE5aN3jQmIlrT7ZUX52Ff/hSdx/JKDP3YMNtt4B0cH6ejIjtqTd+Ge8sSttsnNM0CQUkXps w98jwz+Lxw/bKMr3NSnnFpUZaxwji3BC9vYyxKMAwNelBCHEgS/OAa3EJoTfuYOK6wT6nadm YqYjwYbZE5V/SwzMbpWu7Jwlvuwyfo5mh7w5iMfnZE+vHFwp/wARAQABzSBKaXJpIFNsYWJ5 IDxqaXJpc2xhYnlAZ21haWwuY29tPsLBewQTAQIAJQIbAwYLCQgHAwIGFQgCCQoLBBYCAwEC HgECF4AFAk6S6P4CGQEACgkQvSWxBAa0cEl1Sg//UMXp//d4lP57onXMC2y8gafT1ap/xuss IvXR+3jSdJCHRaUFTPY2hN0ahCAyBQq8puUa6zaXco5jIzsVjLGVfO/s9qmvBTKw9aP6eTU7 77RLssLlQYhRzh7vapRRp4xDBLvBGBv9uvWORx6dtRjh+e0J0nKKce8VEY+jiXv1NipWf+RV vg1gVbAjBnT+5RbJYtIDhogyuBFg14ECKgvy1Do6tg9Hr/kU4ta6ZBEUTh18Io7f0vr1Mlh4 yl2ytuUNymUlkA/ExBNtOhOJq/B087SmGwSLmCRoo5VcRIYK29dLeX6BzDnmBG+mRE63IrKD kf/ZCIwZ7cSbZaGo+gqoEpIqu5spIe3n3JLZQGnF45MR+TfdAUxNQ4F1TrjWyg5Fo30blYYU z6+5tQbaDoBbcSEV9bDt6UOhCx033TrdToMLpee6bUAKehsUctBlfYXZP2huZ5gJxjINRnlI gKTATBAXF+7vMhgyZ9h7eARG6LOdVRwhIFUMGbRCCMXrLLnQf6oAHyVnsZU1+JWANGFBjsyy fRP2+d8TrlhzN9FoIGYiKjATR9CpJZoELFuKLfKOBsc7DfEBpsdusLT0vlzR6JaGae78Od5+ ljzt88OGNyjCRIb6Vso0IqEavtGOcYG8R5gPhMV9n9/bCIVqM5KWJf/4mRaySZp7kcHyJSb0 O6nOwU0ETpLnhgEQAM+cDWLL+Wvc9cLhA2OXZ/gMmu7NbYKjfth1UyOuBd5emIO+d4RfFM02 XFTIt4MxwhAryhsKQQcA4iQNldkbyeviYrPKWjLTjRXT5cD2lpWzr+Jx7mX7InV5JOz1Qq+P +nJWYIBjUKhI03ux89p58CYil24Zpyn2F5cX7U+inY8lJIBwLPBnc9Z0An/DVnUOD+0wIcYV nZAKDiIXODkGqTg3fhZwbbi+KAhtHPFM2fGw2VTUf62IHzV+eBSnamzPOBc1XsJYKRo3FHNe LuS8f4wUe7bWb9O66PPFK/RkeqNX6akkFBf9VfrZ1rTEKAyJ2uqf1EI1olYnENk4+00IBa+B avGQ8UW9dGW3nbPrfuOV5UUvbnsSQwj67pSdrBQqilr5N/5H9z7VCDQ0dhuJNtvDSlTf2iUF Bqgk3smln31PUYiVPrMP0V4ja0i9qtO/TB01rTfTyXTRtqz53qO5dGsYiliJO5aUmh8swVpo tgK4/57h3zGsaXO9PGgnnAdqeKVITaFTLY1ISg+Ptb4KoliiOjrBMmQUSJVtkUXMrCMCeuPD GHo739Xc75lcHlGuM3yEB//htKjyprbLeLf1y4xPyTeeF5zg/0ztRZNKZicgEmxyUNBHHnBK HQxz1j+mzH0HjZZtXjGu2KLJ18G07q0fpz2ZPk2D53Ww39VNI/J9ABEBAAHCwV8EGAECAAkF Ak6S54YCGwwACgkQvSWxBAa0cEk3tRAAgO+DFpbyIa4RlnfpcW17AfnpZi9VR5+zr496n2jH /1ldwRO/S+QNSA8qdABqMb9WI4BNaoANgcg0AS429Mq0taaWKkAjkkGAT7mD1Q5PiLr06Y/+ Kzdr90eUVneqM2TUQQbK+Kh7JwmGVrRGNqQrDk+gRNvKnGwFNeTkTKtJ0P8jYd7P1gZb9Fwj 9YLxjhn/sVIhNmEBLBoI7PL+9fbILqJPHgAwW35rpnq4f/EYTykbk1sa13Tav6btJ+4QOgbc ezWIwZ5w/JVfEJW9JXp3BFAVzRQ5nVrrLDAJZ8Y5ioWcm99JtSIIxXxt9FJaGc1Bgsi5K/+d yTKLwLMJgiBzbVx8G+fCJJ9YtlNOPWhbKPlrQ8+AY52Aagi9WNhe6XfJdh5g6ptiOILm330m kR4gW6nEgZVyIyTq3ekOuruftWL99qpP5zi+eNrMmLRQx9iecDNgFr342R9bTDlb1TLuRb+/ tJ98f/bIWIr0cqQmqQ33FgRhrG1+Xml6UXyJ2jExmlO8JljuOGeXYh6ZkIEyzqzffzBLXZCu jlYQDFXpyMNVJ2ZwPmX2mWEoYuaBU0JN7wM+/zWgOf2zRwhEuD3A2cO2PxoiIfyUEfB9SSmf faK/S4xXoB6wvGENZ85Hg37C7WDNdaAt6Xh2uQIly5grkgvWppkNy4ZHxE+jeNsU7tg= Message-ID: <955a0492-bab0-59d3-d01d-bea096c6e40f@suse.cz> Date: Wed, 7 Nov 2018 10:03:08 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.2.1 MIME-Version: 1.0 In-Reply-To: <46b26403-395b-6a3c-ea6e-c3c811fdc400@dustymabe.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-GB Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 05. 11. 18, 2:45, Dusty Mabe wrote: > If a patch were submitted to enable this type of behavior would such a > patch be acceptable? Maybe it could be a compile time option and also > have a kernel arg option to enable/disable it. Hi, it might kill the system on some setups where people specify more serial (or similarly slow consoles). Output to some console is so slow that the system does nothing else than writing to the consoles. What might work as the first step to check it out is adding a flag to the console= option which would mark a console as a /dev/console device too and multiplex only those specified by the user. Then let's see how it goes with userspace logging out in the wild... thanks, -- js suse labs