linux-kernel - Re: [patch 3/4] cpu alloc: The allocator

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Message-ID: <48E20F98.4010106@linux-foundation.org>
Date:	Tue, 30 Sep 2008 06:38:00 -0500
From:	Christoph Lameter <cl@...ux-foundation.org>
To:	Pekka Enberg <penberg@...helsinki.fi>
CC:	akpm@...ux-foundation.org, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, rusty@...tcorp.com.au, jeremy@...p.org,
	ebiederm@...ssion.com, travis@....com, herbert@...dor.apana.org.au,
	xemul@...nvz.org
Subject: Re: [patch 3/4] cpu alloc: The allocator

Pekka Enberg wrote:

>> +/*
>> + * Basic allocation unit. A bit map is created to track the use of each
>> + * UNIT_SIZE element in the cpu area.
>> + */
>> +#define UNIT_TYPE int
>> +#define UNIT_SIZE sizeof(UNIT_TYPE)
>> +
>> +int units;	/* Actual available units */
> 
> What is this thing? Otherwise looks good to me.

This is the number of units available from the cpu allocator. Its determined
on bootup and the bitmap is sized correspondingly.




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