From owner-freebsd-current  Fri Sep 11 11:59:07 1998
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Date: Sat, 12 Sep 1998 04:58:16 +1000
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199809111858.EAA05204@godzilla.zeta.org.au>
To: archer@lucky.net, mike@smith.net.au
Subject: Re: ELF world and MFS / groff issues
Cc: current@FreeBSD.ORG
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>>> if CFLAGS/COPTFLAGS are changed to -O3 -m486 -pipe, an ELF make world will
>>> produce somewhat weird versions of groff / troff:
>
>MS> -O3 is known to produce broken code.  Don't use it.

Where is it known?

>I noticed that kernel on my CURRENT, when compiled with -O0,
>panics with "Supervisor read: page not present" in a few seconds
>after boot. Is it also known?

It is now.  ffs_balloc() follows an unitialized pointer in dead code
that is normally optimized away.

Bruce

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