Date: Wed, 30 Jun 2004 01:14:51 +0000 From: Kris Kennaway <kris@FreeBSD.org> To: Tor Egge <tegge@FreeBSD.org> Cc: cvs-all@FreeBSD.org Subject: Re: cvs commit: src/sys/vm vm_object.c Message-ID: <20040630011451.GA86791@hub.freebsd.org> In-Reply-To: <200406282026.i5SKQZZQ062647@repoman.freebsd.org> References: <200406282026.i5SKQZZQ062647@repoman.freebsd.org>
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On Mon, Jun 28, 2004 at 08:26:35PM +0000, Tor Egge wrote:
> tegge 2004-06-28 20:26:35 UTC
>
> FreeBSD src repository
>
> Modified files:
> sys/vm vm_object.c
> Log:
> Initialize result->backing_object_offset before linking result onto the list of
> vm objects shadowing source in vm_object_shadow(). This closes a race where
> vm_object_collapse() could be called with a partially uninitialized object
> argument causing symptoms that looked like hardware problems, e.g. signal 6,
> 10, 11 or a /bin/sh busy-waiting for a nonexistant child process.
>
> Revision Changes Path
> 1.325 +5 -5 src/sys/vm/vm_object.c
Sweet..this sounds like the bug that was exposed by turning ithread
preemption back on. I'll update and see if it's gone.
Kris
--
In God we Trust -- all others must submit an X.509 certificate.
-- Charles Forsythe <forsythe@alum.mit.edu>
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