Date: Sun, 19 Aug 2001 22:21:32 -0400 (EDT) From: Andrew Gallatin <gallatin@cs.duke.edu> To: naddy@mips.inka.de (Christian Weisgerber) Cc: freebsd-alpha@FreeBSD.ORG Subject: Re: alpha problems on current Message-ID: <15232.29740.434880.140986@grasshopper.cs.duke.edu> In-Reply-To: <9ln48d$1ml6$1@kemoauc.mips.inka.de> References: <20010817081929.A2859@freebie.xs4all.nl> <20010817152742.B437@cicely20.cicely.de> <9lje5o$24ra$1@kemoauc.mips.inka.de> <20010818172224.A4918@cicely20.cicely.de> <9ln48d$1ml6$1@kemoauc.mips.inka.de>
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Christian Weisgerber writes:
> Bernd Walter <ticso@mail.cicely.de> wrote:
>
> > > > > - I'm seeing mysterious writes (kevent says NOTE_WRITE) to my
> > > > > executables. I suspect this is a VM bug.
> >
> > Have you found a way to isulate when it happens?
>
> No. I wrote a little program that watches /bin/* through kevent(2),
> but I'm uncertain how to trace this any further. The writes don't
> appear to be related to any particular system activity, although
> they possibly correlate with the amount of activity. Also, if I
> don't run setiathome in the background I get far fewer writes.
You might try putting a breakpoint (compile with ddb, insert
Debugger("foo")) into the appropriate kqueue filtering code
and getting a stack trace.
I'm not sure how many NOTE_WRITE filters will be in use other than
yours, but you should be able to catch it..
Drew
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