Date: Mon, 17 Jun 2013 10:07:50 +0200 From: Florent Peterschmitt <florent@peterschmitt.fr> To: freebsd-current@freebsd.org Subject: Re: Handle kernel module crashes Message-ID: <51BEC3D6.4080306@peterschmitt.fr> In-Reply-To: <51BAC30F.1090208@freebsd.org> References: <51B5E040.2030709@peterschmitt.fr> <51BAC30F.1090208@freebsd.org>
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[-- Attachment #1 --] On 14.06.2013 09:15, Julian Elischer wrote: > On 6/10/13 10:18 PM, Florent Peterschmitt wrote: >> Hello, >> >> It's not a problem but a question, and it's quite simple: >> >> How does FreeBSD handle crash from a single kernel module ? >> >> If the module internally crashes, does the entire system does too or >> FreeBSD will continue to live ? >> >> Thanks >> > a Module is by definition a part of the kernel with no barriers to > prevent it > from damaging the kernel. > In a monolithic kernel (such as FreeBSD, or Linux) the module is loaded > into the > protection domain of the kernel. > > Much research was done in the 90s (and continues) with microkernels > where some of the functionality of modules is instead given to > "processes" which can be limited in the damage > they can do. > > Some work is ongoing to sandbox drivers (for example) but it always > comes at an expense of > performance. Thank you (all) for answers :) -- Florent Peterschmitt | Please: florent@peterschmitt.fr | * Avoid HTML/RTF in E-mail. +33 (0)6 64 33 97 92 | * Send PDF for documents. http://florent.peterschmitt.fr | Thank you :) [-- Attachment #2 --] -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.20 (FreeBSD) Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/ iQEcBAEBAgAGBQJRvsPeAAoJEMtO2Sol0IIm7r0H/0K/79S+ilR3cYq8pyxR5url jaknTqfzzhrCqeUd6qeKYi213HEHFepnXTcZoS9y5+GU7TeKkqmkrbApzo5AQRF3 li6EL/EdfN1ENYrGWKYFyqqEXxBlSqLzb3Fjjo08x3oDsc8wkC8jm7hI7Y2u1LP2 tczeNU0/Fa1TmDVtvHZUGtv6+W0gLQQYIEazFvjCHS/bd0x78BSxJo1PNPmZdPUs dc7E9Bmwt4jOg7Cxm7aK1mkYZV97NLuAqUT0mWLZGLQ+NLfVryySR5oc7V2cpjsg 8O1KOnauemovpgrsrUd34G536tRijR2yB2EGiP7LTwu2cpePIfw/1UbNucWkn0U= =eWDP -----END PGP SIGNATURE-----help
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