From owner-freebsd-hackers  Fri Mar 28 16:30:59 1997
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Date: Sat, 29 Mar 1997 11:30:29 +1100
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199703290030.LAA17704@godzilla.zeta.org.au>
To: jdp@polstra.com, smc@servtech.com
Subject: Re: Anyone else seen this?
Cc: dyson@freebsd.org, hackers@freebsd.org
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>Setting breakpoints shouldn't change the modtime of the file, of course,
>since it's mapped copy-on-write.  So there still seems to be some sort
>of VM problem, regardless of these other considerations.

Setting breakpoints certainly changes a copy of the text, and for some
reason vm_object_page_clean() writes to the file on the next sync.  It
seems to write the unaltered copy, but there is real disk traffic and
the mtime and ctime are clobbered.

Bruce