In-Reply-To: <aday6z7csb4.fsf@cisco.com>
References: <200806061835.43802.fenkes@de.ibm.com>	<48499C11.7030504@gmail.com> <200811251358.06729.fenkes@de.ibm.com> <aday6z7csb4.fsf@cisco.com>
To: Roland Dreier <rdreier@cisco.com>
Cc: Alexander Schmidt1 <ALEXSCHM@de.ibm.com>,
       Christoph Raisch <RAISCH@de.ibm.com>,
       OF-EWG <ewg@lists.openfabrics.org>,
       OF-General <general@lists.openfabrics.org>,
       Hoang-Nam Nguyen <HNGUYEN@de.ibm.com>,
       LKML <linux-kernel@vger.kernel.org>,
       LinuxPPC-Dev <linuxppc-dev@ozlabs.org>,
       Roland Dreier <rolandd@cisco.com>,
       Stefan Roscher <stefan.roscher@de.ibm.com>
MIME-Version: 1.0
Subject: Re: [PATCH] IB/ehca: Change misleading error message
From: Joachim Fenkes <FENKES@de.ibm.com>
Message-ID: <OFDC616681.53A831E8-ONC125750D.0046F124-C125750D.004B8673@de.ibm.com>
Date: Wed, 26 Nov 2008 14:44:56 +0100
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Sender: linux-kernel-owner@vger.kernel.org
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Roland Dreier <rdreier@cisco.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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