linux-kernel - Re: [PATCH] IB/ehca: Change misleading error message

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Date:	Wed, 26 Nov 2008 14:44:56 +0100
From:	Joachim Fenkes <FENKES@...ibm.com>
To:	Roland Dreier <rdreier@...co.com>
Cc:	Alexander Schmidt1 <ALEXSCHM@...ibm.com>,
	Christoph Raisch <RAISCH@...ibm.com>,
	OF-EWG <ewg@...ts.openfabrics.org>,
	OF-General <general@...ts.openfabrics.org>,
	Hoang-Nam Nguyen <HNGUYEN@...ibm.com>,
	LKML <linux-kernel@...r.kernel.org>,
	LinuxPPC-Dev <linuxppc-dev@...abs.org>,
	Roland Dreier <rolandd@...co.com>,
	Stefan Roscher <stefan.roscher@...ibm.com>
Subject: Re: [PATCH] IB/ehca: Change misleading error message

Roland Dreier <rdreier@...co.com> wrote on 26.11.2008 00:13:51:

> That's too bad... I applied this patch but out of curiousity, why
> doesn't the hot-remove/hot-add work?  I would have thought that
> re-registering all of memory after the hot-add would do the right thing.

That's right, but right now, we simply try to register all of memory from 
KERNELBASE to high_memory, which works right until we have memory holes in 
the middle; then the hypervisor will reject our page registrations. Same 
goes for huge (16GB) pages, by the way. We're working on a solution to 
this.

Cheers,
  Joachim
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