Re: unmount oops in log_do_checkpoint

[Andrew Morton]

Nick Piggin <npiggin@xxxxxxx> wrote:
>
> On Mon, Jan 16, 2006 at 10:22:50PM +0100, Jan Kara wrote:
> > > 2.6.15-git12 (and 11, not sure when it started) oops when unmounting
> > > an ext3 filesystem. Looks like 'transaction' in log_do_checkpoint is
> > > garbage.
> > > 
> 
> [oops]
> 
> >   It would be useful to find out which patch cause it (by git bisect)
> > but one obvious suspect is my merged ext3 patch to checkpoint.c. I'll
> > investigate tomorrow.
> > 
> 
> Yep, reverting jbd split checkpoint lists in -git12 fixes it. It is
> 100% reproducible so far, and every time rebooting with a patched
> kernel fails to result in the oops.
> 

But that patch was in -mm for months.  How come you didn't hit the oops
earlier?  One would almost expect some odd patch interaction, but changes
in ext3 have been small for a long time.
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