From mboxrd@z Thu Jan  1 00:00:00 1970
From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Date: Tue, 03 Jun 2014 07:52:19 +0000
Subject: Re: [PATCH 4/4] powerpc/eeh: Avoid event on passed PE
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To: Alexander Graf <agraf@suse.de>
Cc: "aik@ozlabs.ru" <aik@ozlabs.ru>, Gavin Shan <gwshan@linux.vnet.ibm.com>, "kvm-ppc@vger.kernel.org" <kvm-ppc@vger.kernel.org>, "alex.williamson@redhat.com" <alex.williamson@redhat.com>, Paul Mackerras <paulus@samba.org>, "qiudayu@linux.vnet.ibm.com" <qiudayu@linux.vnet.ibm.com>, "linuxppc-dev@lists.ozlabs.org" <linuxppc-dev@lists.ozlabs.org>

On Tue, 2014-06-03 at 09:45 +0200, Alexander Graf wrote:
> For EEH it could as well be a dumb eventfd - really just a side
> channel that can tell user space that something happened
> asynchronously :).

Which the host kernel may have no way to detect without actively poking
at the device (fences in powernv or anything in PAPR host) and the only
user of this for now has no use for.

I insist don't bother.

Cheers,
Ben.