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

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Date:	Fri, 8 Jun 2007 15:38:02 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	"Siddha, Suresh B" <suresh.b.siddha@...el.com>
cc:	Andrew Morton <akpm@...ux-foundation.org>,
	"Keshavamurthy, Anil S" <anil.s.keshavamurthy@...el.com>,
	Andreas Kleen <ak@...e.de>, linux-kernel@...r.kernel.org,
	gregkh@...e.de, muli@...ibm.com, asit.k.mallick@...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, Siddha, Suresh B wrote:

> > If for some reason you really can't do that (and a requirement for
> > allocation-in-interrupt is the only valid reason, really) and if you indeed
> > can demonstrate memory allocation failures with certain workloads then
> > let's take a look at that.  As I said, attaching a reserve pool to your
> > slab cache might be a suitable approach.  But none of these things are
> 
> I agree. We are better off with enhancing slab infrastructure for this, if
> needed.

The slab allocators already use the page allocators atomic reserves if 
called with GFP_ATOMIC. 
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