Bug in umount code

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Article #302

#302

From: John Woods
Date: Tue, 18 Mar 1986 00:52

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There appears to be a bug in umount on slow devices (and in principle on
faster ones).  umount invalidates the entries in the buffer cache by setting
their b_dev field to -1.  However, slow devices like RK05s and RX02s, when
they finally get around to looking at these entries some time later, find
that they point to non-existant devices (like minor device 7 in the case of
the RK05).  Is there a standard fix for this problem?
-- 
John Woods, Charles River Data Systems
decvax!frog!john, mit-eddie!jfw, JFW%mit-ccc@MIT-XX

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Message-ID: <1307@mit-eddie.MIT.EDU>

Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!jfw

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Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP
Posting-Version: version B 2.10.3 4.3bsd-beta 6/6/85; site mit-eddie.MIT.EDU
Path: arc1-ca.pugleaf.net!utzoo!watmath!clyde!burl!ulysses!allegra!mit-eddie!jfw
From: jfw@mit-eddie.MIT.EDU (John Woods)
Newsgroups: net.bugs.2bsd
Subject: Bug in umount code
Message-ID: <1307@mit-eddie.MIT.EDU>
Date: Mon, 17-Mar-86 19:52:46 EST
Article-I.D.: mit-eddi.1307
Posted: Mon Mar 17 19:52:46 1986
Date-Received: Tue, 18-Mar-86 08:35:50 EST
Organization: M.I.T. EE/CS Computer Facility, Cambridge MA
Lines: 9
Keywords: umount block cache slow devices