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From: Balbir Singh <balbir@linux.vnet.ibm.com>
To: Pavel Machek <pavel@ucw.cz>
Cc: Olof Johansson <olof@lixom.net>,
	linuxppc-dev@ozlabs.org, LKML <linux-kernel@vger.kernel.org>,
	David Rientjes <rientjes@google.com>
Subject: Re: [PATCH] Fake NUMA emulation for PowerPC
Date: Sun, 09 Dec 2007 18:50:30 +0530	[thread overview]
Message-ID: <475BEB9E.4070606@linux.vnet.ibm.com> (raw)
In-Reply-To: <20071209131636.GF4381@ucw.cz>

Pavel Machek wrote:
> On Sat 2007-12-08 09:52:06, Balbir Singh wrote:
>> David Rientjes wrote:
>>> On Sat, 8 Dec 2007, Balbir Singh wrote:
>>>
>>>> To be able to test the memory controller under NUMA, I use fake NUMA
>>>> nodes. x86-64 has a similar feature, the code I have here is the
>>>> simplest I could come up with for PowerPC.
>>>>
>>> Magnus Damm had patches from over a year ago that, I believe, made much of 
>>> the x86_64 fake NUMA code generic so that it could be extended for 
>>> architectures such as i386.  Perhaps he could resurrect those patches if 
>>> there is wider interest in such a tool.
>> That would be a very interesting patch, but what I have here is the
>> simplest patch and we could build on it incrementally. The interface is
>> non-standard but it does amazing things for 59 lines of code change.
> 
> Well, maybe it is amazing, but having non-standard interface is also
> wrong...
> 

I tend to agree with you, but in this case it's mostly debug
infrastructure that is architecture specific.

-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL

WARNING: multiple messages have this Message-ID (diff)
From: Balbir Singh <balbir@linux.vnet.ibm.com>
To: Pavel Machek <pavel@ucw.cz>
Cc: LKML <linux-kernel@vger.kernel.org>,
	linuxppc-dev@ozlabs.org, David Rientjes <rientjes@google.com>,
	Olof Johansson <olof@lixom.net>
Subject: Re: [PATCH] Fake NUMA emulation for PowerPC
Date: Sun, 09 Dec 2007 18:50:30 +0530	[thread overview]
Message-ID: <475BEB9E.4070606@linux.vnet.ibm.com> (raw)
In-Reply-To: <20071209131636.GF4381@ucw.cz>

Pavel Machek wrote:
> On Sat 2007-12-08 09:52:06, Balbir Singh wrote:
>> David Rientjes wrote:
>>> On Sat, 8 Dec 2007, Balbir Singh wrote:
>>>
>>>> To be able to test the memory controller under NUMA, I use fake NUMA
>>>> nodes. x86-64 has a similar feature, the code I have here is the
>>>> simplest I could come up with for PowerPC.
>>>>
>>> Magnus Damm had patches from over a year ago that, I believe, made much of 
>>> the x86_64 fake NUMA code generic so that it could be extended for 
>>> architectures such as i386.  Perhaps he could resurrect those patches if 
>>> there is wider interest in such a tool.
>> That would be a very interesting patch, but what I have here is the
>> simplest patch and we could build on it incrementally. The interface is
>> non-standard but it does amazing things for 59 lines of code change.
> 
> Well, maybe it is amazing, but having non-standard interface is also
> wrong...
> 

I tend to agree with you, but in this case it's mostly debug
infrastructure that is architecture specific.

-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL

  reply	other threads:[~2007-12-09 13:20 UTC|newest]

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2007-12-07 21:14 [PATCH] Fake NUMA emulation for PowerPC Balbir Singh
2007-12-07 21:14 ` Balbir Singh
2007-12-07 21:28 ` Olof Johansson
2007-12-07 21:35   ` Balbir Singh
2007-12-07 21:55     ` Kumar Gala
2007-12-07 22:12       ` Balbir Singh
2007-12-07 22:15         ` Kumar Gala
2007-12-07 22:18           ` Balbir Singh
2007-12-07 23:10         ` David Rientjes
2007-12-07 23:10           ` David Rientjes
2007-12-08  4:22           ` Balbir Singh
2007-12-08  4:22             ` Balbir Singh
2007-12-09 13:16             ` Pavel Machek
2007-12-09 13:16               ` Pavel Machek
2007-12-09 13:20               ` Balbir Singh [this message]
2007-12-09 13:20                 ` Balbir Singh
2007-12-07 23:06   ` David Rientjes
2007-12-07 23:06     ` David Rientjes
2007-12-07 21:30 ` Geert Uytterhoeven
2007-12-07 21:33   ` Dave Quigley
2007-12-07 21:35   ` Balbir Singh
2007-12-07 21:43     ` Balbir Singh
2007-12-07 21:58       ` Arnd Bergmann
2007-12-07 21:58         ` Arnd Bergmann
2007-12-07 22:03         ` Balbir Singh
2007-12-07 22:03           ` Balbir Singh
2007-12-07 22:01 ` Arnd Bergmann
2007-12-07 22:01   ` Arnd Bergmann
2007-12-07 22:22   ` Balbir Singh
2007-12-07 22:11 ` Nathan Lynch
2007-12-07 22:26   ` Balbir Singh
2007-12-07 23:11     ` David Rientjes
2007-12-07 23:11       ` David Rientjes
2007-12-08  4:32       ` Balbir Singh
2007-12-08  4:45         ` David Rientjes

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