On Mon, 31 Oct 2011 23:09:04 -0700 Manish Katiyar [off-list ref] wrote:

quoted

I think you were quite unlucky to hit this and that you will find it hard to
reproduce. :-(

Well, its always reproducible on my ubuntu when I run that script.

Excellent!!   That means you can reliably see if the patch fixes it. :-)

I guess I was thinking of 'real' devices which are slower than XOR.  You were
using loop back device on files in /tmp which are presumably always in memory.
I guess it would be a lot easier to hit in that case.

Thanks,
NeilBrown