>
> Pieter de Goeje wrote:
> > On Sunday 14 October 2007, Eric Anderson wrote:
> >> Pieter de Goeje wrote:
> >>> On Saturday 13 October 2007, Rolf Witt wrote:
> >>>> Backtrace from crash tonight (after portsnap cron):
> >>> <snip>
> >>>
> >>>> # uname -a
> >>>> FreeBSD peanuts.homenet.local 7.0-PRERELEASE FreeBSD 7.0-PRERELEASE
> >>>> #121: Thu Oct 11 16:29:05 CEST 2007
> >>>> rowi@peanuts.homenet.local:/usr/obj/usr/src/sys/PEANUTS i386
> >>>>
> >>>> Sources from Builddate.
> >>>>
> >>>> Rowi
> >>> Eric sent me this patch:
> >>>
http://www.googlebit.com/freebsd/patches/ffs_softdep.c-patch
> >>> which seems to be working great so far. I am still testing it, but I
> >>> think it fixed the problem.
> >>> To apply, cd /usr/src; patch < /path/to/patch and then rebuild the
> >>> kernel.
> >>>
> >>> Cheers,
> >>> Pieter de Goeje
> >> It doesn't actually 'fix' the problem, but I think it helps identify
> it.
> >> I'm not 100% certain if this is the right fix our not, but so far
> >> feedback has been good when running with this patch.
> >>
> >> Can somebody confirm that this patch is ok?
> >>
> >> Eric
> > Can you elaborate on what this patch exactly does / what the problem is?
> >
> > Pieter
>
>
> I think the problem is that blocks are being put in the worklist twice,
> but I'm not certain why yet. The patch reduces the chance of this
> happening by more often removing the block from the worklist instead of
> leaving it on. I think actually the patch is hiding the real issue more
> than anything, which is why I said it isn't fixing the problem, but
> because of the reports I've seen, I think we're sniffing in the right
> area. I'll be looking more into this soon, when I get another few
> minutes of free time and my debugger..
