Re: Bug#10147: kernel `bit already cleared' message (fwd)

Roar Thronfs (roart@nvg.ntnu.no)
Wed, 28 May 1997 10:51:00 +0200 (MET DST)


On Wed, 28 May 1997, Jon Lewis wrote:

> On Tue, 27 May 1997, Herbert Xu wrote:
>
> > Package: kernel
> > Version: 2.0.29 (vanilla)
> >
> > I'm getting a fair number of messages like this one:
> >
> > May 26 17:57:49 chiark kernel: EXT2-fs warning (device 03:01): ext2_free_blocks: bit already cleared for block 438785
> >
> > There are no other messages which might indicate disk failure, &c., so
> > I conjecture a kernel bug which has been triggered by a change in use
> > patterns.
>
> I get these somewhat frequently on one of my systems as well. Usually,
> it's bogus...i.e. umount and e2fsck, and nothing is found.

Lucky. I got something in lost+found. (But it was just ftp mirrors on
that partition, so no real damage happened.)

> EXT2-fs warning (device 08:16): ext2_free_blocks: bit already cleared for
> block 404354
>
> kernel=2.0.30, device = IBM DORS 2gb SCSI disk on an NCR 810 using the BSD
> ported ncr8xx driver. I'm considering trying to swap the NCR out for a
> Buslogic to see what happens.

The same happened with 2.0.27 device=FIREBALL_TM3200S Rev: 300X on a
BusLogic 948. In addition some files changed owner id to 3599.

(The box where this happened is weird: If you change some hardware (like
a PCI VGA or network card), it crashes)

-Roar Thronęs