On 2014-04-09 19:36, Benjamin Herrenschmidt wrote:
> On Wed, 2014-04-09 at 19:31 -0600, Jens Axboe wrote:
>> OK, I think we're seeing different symptoms of the same bug. Stay
>> tuned, will have something for you to test shortly, I hope.
>
> Ah thanks. I'll defer the bisection then (it's painful on that machine
> for various reasons....)

Can you try with these two patches applied?

-- 
Jens Axboe