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Date: Mon, 12 Jan 1998 10:31:00 -0800 (PST)
From: Julian Elischer <julian@whistle.com>
To: Poul-Henning Kamp <phk@freebsd.org>
cc: dyson@freebsd.org, current@freebsd.org
Subject: Re: random (?) SIGBUS in -current
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kernel from late last night
system got 85% through 'make world' before a process hung in 'D' state.
The rest of the system seemed ok.

no sign of SIGBUS though.

julian

(p.s. make-world completed correctly after hacking makefile (to not
rebuild tools etc again) and restarting) 

On Mon, 12 Jan 1998, Poul-Henning Kamp wrote:

> 
> I see random SIGBUS in programs now on current up to and including:
> 
> > dyson       1998/01/11 21:16:06 PST
> > 
> >   Modified files:
> >     sys/i386/i386        machdep.c 
> >   Log:
> >   Adjust upwards the size of exec map in order to take into account the
> >   additional PAGE_SIZE needed for exec operatino.
> >   
> >   Revision  Changes    Path
> >   1.281     +2 -2      src/sys/i386/i386/machdep.c
> 
> I belive it is related to caching somehow.  It never seems to happen
> on the first invocation of a program, but rather if I run a program
> do something else, run the program again, then bang.
> 
> The ucode in trap() is T_PAGEFLT if that helps any.
> 
> --
> Poul-Henning Kamp             FreeBSD coreteam member
> phk@FreeBSD.ORG               "Real hackers run -current on their laptop."
>