Message-ID: <4B5760BA.4060903@kernel.org>
Date: Wed, 20 Jan 2010 11:59:54 -0800
From: Yinghai Lu <yinghai@kernel.org>
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To: Christoph Lameter <cl@linux-foundation.org>
CC: Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
       "H. Peter Anvin" <hpa@zytor.com>,
       Andrew Morton <akpm@linux-foundation.org>,
       Jesse Barnes <jbarnes@virtuousgeek.org>, linux-kernel@vger.kernel.org,
       linux-pci@vger.kernel.org
Subject: Re: [PATCH 01/37] x86: move range related operation to one file
References: <1263611228-6751-1-git-send-email-yinghai@kernel.org> <1263611228-6751-2-git-send-email-yinghai@kernel.org> <alpine.DEB.2.00.1001191048480.22304@router.home> <4B575B68.4030809@kernel.org> <alpine.DEB.2.00.1001201350310.15175@router.home>
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On 01/20/2010 11:51 AM, Christoph Lameter wrote:
> On Wed, 20 Jan 2010, Yinghai Lu wrote:
> 
>>> Subtract range can now do what update_range did? How so?
>>
>> update_range was introduced at first. and actually it did sth like subtract range.
>>
>> and subtract range is more accurate.
> 
> Subtract range suggest that you may be removing the range.
> 
> subtract_from_range?

void subtract_range(struct range *range, int az, u64 start, u64 end)

struct range *range, int az : is the original range holder.

and will remove [start,  end)

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