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In-Reply-To: <20151123133317.GA58629@kib.kiev.ua>
References: <20151123132320.GJ1119@albert.catwhisker.org>
 <20151123133317.GA58629@kib.kiev.ua>
From: Ed Maste <emaste@freebsd.org>
Date: Mon, 23 Nov 2015 12:58:55 -0500
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Message-ID: <CAPyFy2BFqN4asLVOTbViCOO6wXvuOXAJJA74PPhXPbLz5fJU_g@mail.gmail.com>
Subject: Re: Panic: GPF in kernel mode in fork_exit() (prior to FS mouont)
To: Konstantin Belousov <kostikbel@gmail.com>
Cc: David Wolfskill <david@catwhisker.org>,
 "current@freebsd.org" <current@freebsd.org>
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On 23 November 2015 at 08:33, Konstantin Belousov <kostikbel@gmail.com> wrote:
>
> The revision 291171 changed layout of the dereferenced structure
> sysentvec. Was your kernel build clean, or did you used -DNO_CLEAN or
> similar option ? If yes, remove the kernel build directory and start
> from scratch.

Every time removing the build directory and starting from scratch
fixes an issue like this it's demonstrated a bug in our build's
dependency tracking. Starting over is a fine workaround to make
progress, but I'd also like to try to extract sufficient detail when
this happens so that we can fix these cases.