[dm-devel] [PATCH-RFC] Bug in dm-raid1 as used by pvmove

[Alasdair G Kergon]

On Tue, May 09, 2006 at 10:00:18AM -0500, Jon Brassow wrote:
> It looks reasonable at first glance, but I have to think about it more. 
>  Do you have a test case that I can reproduce with?

How about you create a device with an enormous zero mapping followed by
a mirror mapping?

> On May 8, 2006, at 11:55 PM, Neil Brown wrote:
> > We will try to get this patch tested on the machine that showed the
> > fault, but I would appreciate any feedback about the patch and I am
> > still not very familiar with this code.

It's not the first time we've found a bug like that:-(
We need to review the rest of the file - on the face of it, more places
look to be missing that adjustment.

> >+	return (bio->bi_sector - rh->ms->ti->begin) >> rh->region_shift;

Alasdair
-- 
agk at redhat.com