Date: Tue, 8 Oct 2002 15:24:04 -0400 (EDT) From: Jeff Roberson <jroberson@chesapeake.net> To: "Brian F. Feldman" <green@FreeBSD.ORG> Cc: "Steven G. Kargl" <kargl@troutmask.apl.washington.edu>, <freebsd-current@FreeBSD.ORG> Subject: Re: panic from _mutex_assert in kern_lock.c Message-ID: <20021008152323.F75846-100000@mail.chesapeake.net> In-Reply-To: <200210051712.g95HCOLw012226@green.bikeshed.org>
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On Sat, 5 Oct 2002, Brian F. Feldman wrote:
> "Steven G. Kargl" <kargl@troutmask.apl.washington.edu> wrote:
> > The source tree was retrieved by cvsup
> > at 21:47 (PST) on Oct 4.
> >
> > This is a non-GEOM and non-acpi kernel.
> >
> > I have the core and kernel.debug, so any
> > further postmortem is possible.
>
> I think the problem is that in src/sys/ufs/ffs/
> ffs_snapshot.c:ffs_snapshot(),
> as the mnt vnode list is traversed none of the vnodes ("xvp") would actually GET
> VI_LOCK()ed in the first place, and so the LK_INTERLOCK is bogus in the
> vn_lock() call. Kirk would know for sure what to do about this...
>
Yeah, I broke this. I didn't see the LK_INTERLOCK near by when I removed
the interlocking around usecount. I will fix this.
Thanks!
Jeff
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