Re: [BUG] raw over raid5: BUG at drivers/block/ll_rw_blk.c:1967

[David Mansfield]

On Mon, 14 Oct 2002, Andrew Morton wrote:

> David Mansfield wrote:
> > 
> > Hi everyone,
> > 
> > I haven't been able to run raw over raid5 since 2.5.30 or so, but every
> > time I'm about to report it, a new kernel comes out and the problem
> > changes completely :-( Now I'm finally going to start getting out the info
> > it the hopes someone can fix it.  The oops was triggered by attempting to
> > read from /dev/raw/raw1 (bound to /dev/md0) using dd.  System info
> > follows oops:
> > 
> > ------------[ cut here ]------------
> > kernel BUG at drivers/block/ll_rw_blk.c:1967!
> 
> I don't think you told us the kernel version?

Arrgh.  It was 2.5.42 vanilla.

> There have been recent fixes wrt sizing of the BIOs which the
> direct-io layer sends down.  So please make sure that you're
> testing Linus's current -bk, or 2.5.42 plus
> 
> http://www.zip.com.au/~akpm/linux/patches/2.5/2.5.42/2.5.42-mm2/broken-out/dio-bio-add-fix-1.patch

I've applied this patch and retested.  I was able to run dd once this 
time, hit ctrl-c, all ok.  But I hit up-arrow and re-did it and it gave 
the same oops.  I'm going to try with the full (latest) mm patch.

> Either that, or raid5 is bust ;)
> 

I guess so.

David

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| David Mansfield              |
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