linux-kernel - Re: [Patch 3/3] Convert link_mem_sections to use find_memory_block

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Message-Id: <20100930110128.cd1a8606.kamezawa.hiroyu@jp.fujitsu.com>
Date:	Thu, 30 Sep 2010 11:01:28 +0900
From:	KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>
To:	Robin Holt <holt@....com>
Cc:	lkml <linux-kernel@...r.kernel.org>,
	Gary Hade <garyhade@...ibm.com>,
	Badari Pulavarty <pbadari@...ibm.com>,
	Ingo Molnar <mingo@...e.hu>,
	Greg Kroah-Hartman <gregkh@...e.de>,
	Dave Hansen <haveblue@...ibm.com>,
	Matt Tolentino <matthew.e.tolentino@...el.com>,
	"Robert P. J. Day" <rpjday@...shcourse.ca>
Subject: Re: [Patch 3/3] Convert link_mem_sections to use
 find_memory_block_hinted.

On Wed, 29 Sep 2010 14:00:56 -0500
Robin Holt <holt@....com> wrote:

> 
> Modify link_mem_sections() to pass in the previous mem_block as a hint to
> locating the next mem_block.  Since they are typically added in order this
> results in a massive saving in time during boot of a very large system.
> For example, on a 16TB x86_64 machine, it reduced the total time spent
> linking all node's memory sections from 1 hour, 27 minutes to 46 seconds.
> 
> Signed-off-by: Robin Holt <holt@....com>
> To: Gary Hade <garyhade@...ibm.com>
> To: Badari Pulavarty <pbadari@...ibm.com>
> To: Ingo Molnar <mingo@...e.hu>
> Cc: lkml <linux-kernel@...r.kernel.org>
> 
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@...fujitsu.com>

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