linux-kernel - Re: [Intel-IOMMU 02/10] Library routine for pre-allocat pool handling

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Date:	Sun, 10 Jun 2007 09:38:45 -0700
From:	Arjan van de Ven <arjan@...ux.intel.com>
To:	Christoph Lameter <clameter@....com>
CC:	"Keshavamurthy, Anil S" <anil.s.keshavamurthy@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, ak@...e.de, gregkh@...e.de,
	muli@...ibm.com, asit.k.mallick@...el.com,
	suresh.b.siddha@...el.com, ashok.raj@...el.com,
	shaohua.li@...el.com, davem@...emloft.net
Subject: Re: [Intel-IOMMU 02/10] Library routine for pre-allocat pool handling

Christoph Lameter wrote:
> On Fri, 8 Jun 2007, Keshavamurthy, Anil S wrote:
> 
>>> What functionality are you missing in the page allocator? It seems that is 
>>> does what you want?
>> Humm..I basically want to allocate memory during interrupt context and 
>> expect not to fail. I know this is a hard requirement :)
> 
> The page allocator can do that for you. The reserves are configurable. Not 
> failing is a thing unseen in the computer world.

but the page allocator reserve is shared.. and you will need this one 
EXACTLY when the shared pool is getting low... it's not an 
uncorrelated thing!
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