4.2bsd memall mfind crash

[Chris Torek]

In article <339 at algol.spp2.UUCP> urban at spp2.UUCP (Michael Urban) writes:
>We have recently added some additional disk drives to a Vax 11/780
>running 4.2bsd (yeah, I know, I know).  We have since been crashing
>on a "memall mfind" panic about once a day.  At first I thought the
>problem was that we were mounting 17 file systems with NMOUNT set to
>only 15, but increasing NMOUNT to 20 failed to alleviate the problem.

Did you also change cmap.h, and then (as that necessitates) locore.s?

>I note that the clause in memall that is producing the crash is a
>patch that was added (four years ago!) to alleviate another panic, the
>vaguely remembered MUNHASH bug.  

That was a workaround for a compiler bug.

>Does anyone know what the problem is here, and how to fix it?

Switch to 4.3BSD.
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci Dept (+1 301 454 7163)
Domain:	chris at mimsy.umd.edu	Path:	uunet!mimsy!chris