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Subject: Re: [PATCH 08/40] mm: kmem_cache_objsize
From: Peter Zijlstra <a.p.zijlstra@chello.nl>
To: Christoph Lameter <clameter@sgi.com>
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Date: Fri, 04 May 2007 20:21:44 +0200
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On Fri, 2007-05-04 at 11:04 -0700, Christoph Lameter wrote:
> On Fri, 4 May 2007, Peter Zijlstra wrote:
> 
> > > I could add a function that tells you how many object you could allocate 
> > > from a slab without the page allocator becoming involved? It would count 
> > > the object slots available on the partial slabs.
> > 
> > I need to know how many pages to reserve to allocate a given number of
> > items from a given slab; assuming the partial slabs are empty. That is,
> > I need a worst case upper bound.
> 
> Ok so you really need the number of objects per page? If you know the 
> number of objects then you can calculate the pages needed which would be 
> the maximum memory needed?

Yes, that would work.