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Date: Sun, 26 Jul 2015 10:49:56 +0200
From: Edward Tomasz =?utf-8?Q?Napiera=C5=82a?= <trasz@FreeBSD.org>
To: HeTak <hetakcoder@gmail.com>
Cc: freebsd-hackers <freebsd-hackers@freebsd.org>
Subject: Re: Kernel Debug Howto
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On 0725T1324, HeTak wrote:

[..]

> 3- what is the fastest way to apply changes to FreeBSD kernel?
> (For now, I just follow the normal build & install kernel & reboot.)

I have this in my ~/.zshrc:

mbir='make -j4 buildkernel installkernel KERNFAST=1 && reboot'

Together with MODULES_OVERRIDE set to only build the modules I need
(see make.conf manual page) it makes the process pretty quick.