On Wed, Nov 26, 2014 at 03:09:10PM +1100, Michael Ellerman wrote:

On Mon, 2014-24-11 at 22:27:00 UTC, Gavin Shan wrote:

quoted

PE#0 should be regarded as valid for P7IOC, while it's invalid for
PHB3. The patch adds flag EEH_VALID_PE_ZERO to differentiate those
two cases. Without the patch, we possibly see frozen PE#0 state is
cleared without EEH recovery taken on P7IOC as following kernel logs
indicate:

This sounds like an urgent fix but I'm not sure.

You can pick it up for next release. Usually, we shouldn't see errors
from PE#0. Something I did to force that for testing purpose: disable
memory windows of the root complex and then access one of memory BARs
on one adapter behind the root complex.

Thanks,
Gavin

cheers