Re: panic: ffs_blkfree: freeing free block

On Thursday 11 October 2007, Pieter de Goeje wrote:
> On Friday 05 October 2007, Eric Anderson wrote:
> > Arjan van Leeuwen wrote:
> > > 2007/10/3, Peter Jeremy <peterjeremy_at_optushome.com.au>:
> > >> On 2007-Oct-03 15:21:15 +0200, Arjan van Leeuwen <avleeuwen_at_gmail.com>
> > >>
> > >> wrote:
> > >>> Also, I note that everytime I panic, my currently opened files are
> > >>
> > >> reduced
> > >>
> > >>> to 0 bytes. Is that expected?
> > >>
> > >> It depends, are you talking about files being read or only files being
> > >> written?  If this is just affecting writes, then this is a side-effect
> > >> of the stdio buffering, together with the write-back nature of the UFS
> > >> buffer cache in conjunction with soft-updates: Data on disk is
> > >> typically about 30 seconds behind reality and the file contents will
> > >> always be behind the file itself.  It is quite normal for recently
> > >> written files (or files currently being written) to be truncated on
> > >> disk following a crash.
> > >
> > > Yep, these are recently written files indeed. Usually the files I had
> > > open in my editor while it paniced, files that I save often.
> > > Oh well... I'm setting my hopes on this panic being resolved soon then
> > >
> > > :). Thanks for the explanation.
> >
> > Can anyone provide access to the core dumps?
>
> Hi Eric,
>
> I've put a coredump and kernel.debug at
> http://lux.student.utwente.nl/~pyotr/panic/ along with the dmesg and kernel
> configuration file.
This address is no longer valid. Eric, if you are reading this, I've sent you 
mail with the correct address :D.
>
> uname -a:
> FreeBSD unforgiven.student.utwente.nl 7.0-CURRENT FreeBSD 7.0-CURRENT #8:
> Mon Oct  8 01:48:17 CEST 2007
> pyotr_at_unforgiven.student.utwente.nl:/usr/obj/usr/src/sys/UNFORGIVEN  amd64
>
> I am not sure about the security impact of putting a coredump in a public
> place, so I didn't cc current. ("Somewhat" less public this way...)
>
> The panic often occurs while doing
> # portsnap fetch update
> # portversion -vl \<
>
> If you need anything else please let me know.
>
> With kind regards,
> Pieter de Goeje