Andreas Dilger wrote:
>
> Andrew Morton writes:
> > test6-pre2, x86, UP, gcc 2.7.2.3.
> >
> > I'm getting a 100% reproducible assertion failure at balloc.c:558:
> >
> > * way it could happen, thus the BUG().
> > */
> > if (*prealloc_count)
> > BUG();
> > *prealloc_count = 0;
> > *prealloc_block = next_block;
> > /* Writer: end */
> >
> > This is happening when running mmap002. I've put a gdb backtrace up at
> > http://www.uow.edu.au/~andrewm/ext2.txt
>
> Unfortunately, the whole ext2 block allocation code was re-written
> recently by Al Viro for test6-pre1, and it looks like it has bugs (see
> also thread <test6-pre2 loop in ext2_get_block>)...
I suspect this problem is a simple one. Replacing the BUG() with a
printk(*prealloc_count) reveals that it is non-zero about six times during an
mmap002 run. Values vary from 1 to 7. No problems observed from this
workaround.
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