From owner-cvs-sys  Wed Dec 17 12:47:36 1997
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To: Guido van Rooij <guido@gvr.org>
cc: cvs-committers@freebsd.org, cvs-all@freebsd.org, cvs-sys@freebsd.org
Subject: Re: cvs commit: src/sys/kern kern_exec.c 
In-reply-to: Your message of "Wed, 17 Dec 1997 21:39:31 +0100."
             <199712172039.VAA09842@gvr.gvr.org> 
From: David Greenman <dg@root.com>
Reply-To: dg@root.com
Date: Wed, 17 Dec 1997 12:49:08 -0800
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>David Greenman wrote:
>>    This log message is somewhat wrong. It's not the struct buf that was
>> being free()'d, but rather the buffer mapping/target of the struct buf (the
>> filesystem data). A serious bug nonetheless, and I can hardly imagine what
>> this might do to the system.
>
>Might this be an explanation of date stamps suddenly changing on files?
>This has been reported a number of times in the past.

   No. The system will corrupt the files (the in-core copy at least) and/or
crash. The problem with the timestamps has to do with seeing a page
modification when one didn't actually occur - sort of the inverse of a bug
we used to have where we didn't see certain modifications.

-DG

David Greenman
Core-team/Principal Architect, The FreeBSD Project