Re: kern/40470: WAPBL corrupts ext2fs

[Greg Oster <oster%cs.usask.ca@localhost>]

Mindaugas Rasiukevicius writes:
> Greg Oster <oster%cs.usask.ca@localhost> wrote:
> >  > >Description:
> >  > Kernel compiled with WAPBL option corrupts ext2 file systems.
> >  > Maybe some incorrectly handled hook in UFS layer?
> >  > >How-To-Repeat:
> >  > Perform some work on ext2 file system, eg. compile.
> >  > Check the file-system consistency (or even file contents).
> >  > >Fix:
> >  > Workaround: compile kernel without WAPBL option.
> >  
> >  Was / mounted as a log filesystem?
> >  
> 
> Yes. It seems that without "log" for / it is fine (have not done extensive
> testing, though). Do you know the problem?

No, but I bet it's the same problem as in 40361.  (with wapbl on /, 
it thinks it needs to call the wapbl bits for the ext2 filesystem when 
doing a sync.... and it gets it Very Wrong.. )  My guess is that if 
you had a DIAGNOSTIC kernel you'd see roughly the same trace as in 
40361.

Later...

Greg Oster