On Tue, Nov 29, 2011 at 04:30:22PM +0800, Brad Campbell wrote:

On 29/11/11 15:54, Kent Overstreet wrote:

quoted

Ok, that's weird. It shouldn't be able to register the second time
because the first register opens it exclusively, and the second open
will fail with -EBUSY.

Can reproduce it at will here.

I don't doubt you, just surprised. I'll try it out first thing tomorrow.
No reason I shouldn't be able to reproduce it.

I doubt its the driver as the RAID is on the same card as the single
drive I tested with last time.

Ok, raid10 is the one I didn't test - I tried raid0 and 6 and those
worked, but each raid layer has its own code to process bios so it
sounds like there's a corner case we're tripping.

I can probably try some other RAID levels this evening if it would
help. I trashed the RAID recently anyway so I need to re-build it
from scratch.

Let me see if I can reproduce it first, I'll try it first thing in the
morning. Hopefully it'll be something easy.

Were you running in passthrough mode or was caching on when you got the
oops?