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Path: utzoo!linus!philabs!seismo!rlgvax!cvl!umcp-cs!chris
From: chris@umcp-cs.UUCP
Newsgroups: net.unix-wizards
Subject: Re: crashing problem
Message-ID: <2956@umcp-cs.UUCP>
Date: Tue, 4-Oct-83 13:56:37 EDT
Article-I.D.: umcp-cs.2956
Posted: Tue Oct  4 13:56:37 1983
Date-Received: Fri, 7-Oct-83 02:52:00 EDT
References: <12215@sri-arpa.UUCP>
Organization: Univ. of Maryland, Computer Science Dept.
Lines: 13

A quick description of the MPX file bug:  it's due to a problem in
mxclose() in mx2.c where the inode count goes to 0 but mxclose() is
still playing with it, and someone else allocates it.  The CMU fix
was to increment the i_count field at the start of the mxclose()
routine and then check for 2 instead of 1 at the bottom before
returning.  I'm offering to send the CMU fix to anyone who wants it.
We installed it many months ago, and haven't been crashed for mpx
problems since (well, OK, once, for someone's hack, which did something
real bizarre).
-- 
In-Real-Life: Chris Torek, Univ of MD Comp Sci
UUCP:	{seismo,allegra,brl-bmd}!umcp-cs!chris
CSNet:	chris@umcp-cs		ARPA:	chris.umcp-cs@UDel-Relay