Date: Tue, 7 Jul 2015 18:28:07 +0200 From: Polytropon <freebsd@edvax.de> To: Lev <leventelist@gmail.com> Cc: freebsd-questions@freebsd.org Subject: Re: own kernel vs. update Message-ID: <20150707182807.bee1587c.freebsd@edvax.de> In-Reply-To: <20150707180022.02bb01d8@jive.levalinux.org> References: <20150707172116.2aa2d38a@jive.levalinux.org> <20150707172902.99e4afc5.freebsd@edvax.de> <20150707180022.02bb01d8@jive.levalinux.org>
next in thread | previous in thread | raw e-mail | index | archive | help
Re-including list, hope that's okay... On Tue, 7 Jul 2015 18:00:22 +0200, Lev wrote: > Is there any way to compile my kernel and put the result somewhere else, and > make the bootloader load my new kernel? Yes, this is possible. The kernel and the modules can be found in /usr/obj - the subtree where all parts of the compiled systems go before they are installed to their final places. The KODIR variable can be set for the installation process to _not_ default to /boot/kernel for the results: # cd /usr/src # make kernel KERNCONF=MYKERNEL KODIR=mykernel NB: "make kernel" is shorthand for "make buildkernel && make installkernel". Then you can edit /boot/loader.conf to load your custom kernel instead of the GENERIC one that's being installed (and updated with freebsd-update): autoboot_delay="5" kernel="mykernel" bootfile="kernel" This will make the loader load /boot/mykernel/kernel and ignore /boot/kernel/kernel (the GENERIC kernel). See "man loader.conf" and /boot/defaults/loader.conf for details and examples. Maybe this is helpful: https://www.freebsd.org/doc/handbook/kernelconfig-building.html https://www.freebsd.org/doc/handbook/kernelconfig-trouble.html#kernelconfig-noboot > And if I want to run the stock > kernel, I can chose between FreeBSD's and mine? The loader allows that, too. Its interactive mode can be used, see the "unload <name>" and "load <name>" commands when the boot loader has been interrupted. unload mykernel load kernel boot This assumes you're not using the boot menu. -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ...
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20150707182807.bee1587c.freebsd>