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

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Message-ID: <Pine.LNX.4.64.0706081531161.3966@schroedinger.engr.sgi.com>
Date:	Fri, 8 Jun 2007 15:32:08 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	"Keshavamurthy, Anil S" <anil.s.keshavamurthy@...el.com>
cc:	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, arjan@...ux.intel.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

On Fri, 8 Jun 2007, Keshavamurthy, Anil S wrote:

> In the IOMMU case, we need exactly opposite of what mempool provides,
> i.e we always want to look for the element in the pool and if the pool
> has no element then go to OS as a worst case. This resource pool
> library routines do the same. Again, this resource pools 
> grows and shrinks automatically to maintain the minimum pool 
> elements in the background. I am not sure whether this totally
> opposite functionality of mempools and resource pools can be 
> merged.

What functionality are you missing in the page allocator? It seems that is 
does what you want?
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