linux-kernel - Re: [PATCH] mm: add a new command-line kmemcheck value

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Message-ID: <52C4C216.3070607@huawei.com>
Date:	Thu, 2 Jan 2014 09:34:14 +0800
From:	Xishi Qiu <qiuxishi@...wei.com>
To:	Vegard Nossum <vegard.nossum@...il.com>
CC:	Ingo Molnar <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com>,
	"Vegard Nossum" <vegardno@....uio.no>,
	Pekka Enberg <penberg@...nel.org>,
	Mel Gorman <mgorman@...e.de>, <wangnan0@...wei.com>,
	the arch/x86 maintainers <x86@...nel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Linux MM <linux-mm@...ck.org>
Subject: Re: [PATCH] mm: add a new command-line kmemcheck value

On 2013/12/31 18:12, Vegard Nossum wrote:

> (Oops, resend to restore Cc.)
> 
> Hi,
> 
> On 31 December 2013 09:32, Xishi Qiu <qiuxishi@...wei.com> wrote:
>> Add a new command-line kmemcheck value: kmemcheck=3 (disable the feature),
>> this is the same effect as CONFIG_KMEMCHECK disabled.
>> After doing this, we can enable/disable kmemcheck feature in one vmlinux.
> 
> Could you please explain what exactly the difference is between the
> existing kmemcheck=0 parameter and the new kmemcheck=3?
> 
> Thanks,
> 
> 
> Vegard
> 

Hi Vegard,

kmemcheck=0: enable kmemcheck feature, but don't check the memory.
	and the OS use only one cpu.(setup_max_cpus = 1)
kmemcheck=3: disable kmemcheck feature.
	this is the same effect as CONFIG_KMEMCHECK disabled.
	OS will use cpus as many as possible.

Thanks,
Xishi Qiu




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