From: Jack Steiner <steiner@sgi.com>
To: Christoph Lameter <clameter@sgi.com>
Cc: Christian Krafft <krafft@de.ibm.com>,
linux-mm@kvack.org, Martin Bligh <mbligh@mbligh.org>,
linux-kernel@vger.kernel.org
Subject: Re: [patch 2/2] enables booting a NUMA system where some nodes have no memory
Date: Wed, 15 Nov 2006 21:28:35 -0600 [thread overview]
Message-ID: <20061116032835.GA25299@sgi.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0611151754480.24793@schroedinger.engr.sgi.com>
On Wed, Nov 15, 2006 at 05:57:27PM -0800, Christoph Lameter wrote:
> On Wed, 15 Nov 2006, Jack Steiner wrote:
>
> > I doubt that there is a demand for systems with memoryless nodes. However, if the
> > DIMM(s) on a node fails, I think the system may perform better
> > with the cpus on the node enabled than it will if they have to be
> > disabled.
>
> Right now we do not have the capability to remove memory from a node while
> the system is running.
I know. I'm refering to a DIMM that fails power-on diags or one
that is explicitly disabled from the system controller.
Clearly a reboot is required in both cases, but the end result is
a node with cpus and no memory. As I said earlier, the PROM (for several
reasons) automatically the cpus on nodes w/o memory.
WARNING: multiple messages have this Message-ID (diff)
From: Jack Steiner <steiner@sgi.com>
To: Christoph Lameter <clameter@sgi.com>
Cc: Christian Krafft <krafft@de.ibm.com>,
linux-mm@kvack.org, Martin Bligh <mbligh@mbligh.org>,
linux-kernel@vger.kernel.org
Subject: Re: [patch 2/2] enables booting a NUMA system where some nodes have no memory
Date: Wed, 15 Nov 2006 21:28:35 -0600 [thread overview]
Message-ID: <20061116032835.GA25299@sgi.com> (raw)
In-Reply-To: <Pine.LNX.4.64.0611151754480.24793@schroedinger.engr.sgi.com>
On Wed, Nov 15, 2006 at 05:57:27PM -0800, Christoph Lameter wrote:
> On Wed, 15 Nov 2006, Jack Steiner wrote:
>
> > I doubt that there is a demand for systems with memoryless nodes. However, if the
> > DIMM(s) on a node fails, I think the system may perform better
> > with the cpus on the node enabled than it will if they have to be
> > disabled.
>
> Right now we do not have the capability to remove memory from a node while
> the system is running.
I know. I'm refering to a DIMM that fails power-on diags or one
that is explicitly disabled from the system controller.
Clearly a reboot is required in both cases, but the end result is
a node with cpus and no memory. As I said earlier, the PROM (for several
reasons) automatically the cpus on nodes w/o memory.
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next prev parent reply other threads:[~2006-11-16 3:28 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-11-15 18:30 [patch 0/2] fix bugs while booting on NUMA system where some nodes have no mem Christian Krafft
2006-11-15 18:30 ` Christian Krafft
2006-11-15 18:32 ` [patch 1/2] fix call to alloc_bootmem after bootmem has been freed Christian Krafft
2006-11-15 18:32 ` Christian Krafft
2006-11-21 16:55 ` Andrew Morton
2006-11-21 16:55 ` Andrew Morton
2006-11-21 18:02 ` Christian Krafft
2006-11-21 18:26 ` Andrew Morton
2006-11-21 18:26 ` Andrew Morton
2006-11-22 9:23 ` Arnd Bergmann
2006-11-22 9:23 ` Arnd Bergmann
2006-11-15 18:34 ` [patch 2/2] enables booting a NUMA system where some nodes have no memory Christian Krafft
2006-11-15 18:34 ` Christian Krafft
2006-11-15 21:24 ` Christoph Lameter
2006-11-15 21:24 ` Christoph Lameter
2006-11-15 21:58 ` Jack Steiner
2006-11-15 21:58 ` Jack Steiner
2006-11-15 22:40 ` Christoph Lameter
2006-11-15 22:40 ` Christoph Lameter
2006-11-15 22:43 ` Martin Bligh
2006-11-15 22:43 ` Martin Bligh
2006-11-15 22:52 ` Christoph Lameter
2006-11-15 22:52 ` Christoph Lameter
2006-11-16 0:54 ` KAMEZAWA Hiroyuki
2006-11-16 0:54 ` KAMEZAWA Hiroyuki
2006-11-16 0:57 ` Christoph Lameter
2006-11-16 0:57 ` Christoph Lameter
2006-11-16 1:17 ` KAMEZAWA Hiroyuki
2006-11-16 1:17 ` KAMEZAWA Hiroyuki
2006-11-16 15:40 ` Christian Krafft
2006-11-16 15:49 ` Martin J. Bligh
2006-11-16 15:49 ` Martin J. Bligh
2006-11-16 18:46 ` Christoph Lameter
2006-11-16 18:46 ` Christoph Lameter
2006-11-16 2:01 ` Martin Bligh
2006-11-16 2:01 ` Martin Bligh
2006-11-16 1:35 ` Jack Steiner
2006-11-16 1:35 ` Jack Steiner
2006-11-16 1:57 ` Christoph Lameter
2006-11-16 1:57 ` Christoph Lameter
2006-11-16 2:09 ` Martin Bligh
2006-11-16 2:09 ` Martin Bligh
2006-11-16 2:35 ` Christoph Lameter
2006-11-16 2:35 ` Christoph Lameter
2006-11-16 3:28 ` Jack Steiner [this message]
2006-11-16 3:28 ` Jack Steiner
2006-11-15 22:05 ` Martin Bligh
2006-11-15 22:05 ` Martin Bligh
2006-11-15 22:41 ` Christoph Lameter
2006-11-15 22:41 ` Christoph Lameter
2006-11-15 22:46 ` Martin Bligh
2006-11-15 22:46 ` Martin Bligh
2006-11-15 22:51 ` Christoph Lameter
2006-11-15 22:51 ` Christoph Lameter
2006-11-16 0:59 ` KAMEZAWA Hiroyuki
2006-11-16 0:59 ` KAMEZAWA Hiroyuki
2006-11-16 1:22 ` Yasunori Goto
2006-11-16 1:22 ` Yasunori Goto
2006-11-16 0:26 ` Arnd Bergmann
2006-11-16 0:26 ` Arnd Bergmann
2006-11-16 0:45 ` Christoph Lameter
2006-11-16 0:45 ` Christoph Lameter
2006-11-16 13:08 ` Arnd Bergmann
2006-11-16 13:08 ` Arnd Bergmann
2006-11-16 0:44 ` Jesper Juhl
2006-11-16 0:44 ` Jesper Juhl
2006-11-16 0:46 ` Christoph Lameter
2006-11-16 0:46 ` Christoph Lameter
2006-11-16 15:21 ` Lee Schermerhorn
2006-11-16 15:21 ` Lee Schermerhorn
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