linux-kernel - Re: SLUB doesn't work with kdump kernel on Cell

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Message-ID: <Pine.LNX.4.64.0708141241450.30435@schroedinger.engr.sgi.com>
Date:	Tue, 14 Aug 2007 12:42:43 -0700 (PDT)
From:	Christoph Lameter <clameter@....com>
To:	Lucio Correia <ljhc@...ibm.com>
cc:	linux-kernel@...r.kernel.org, Arnd Bergmann <arndb@...db.de>
Subject: Re: SLUB doesn't work with kdump kernel on Cell

On Tue, 14 Aug 2007, Lucio Correia wrote:

> > SLAB boots because it falls back to node 0 for the control structures. So 
> > it creates useless control structures for node 1. These are then never 
> > used since any allocation  attempt to node 1 falls back to node 0.
> 
> Hi Christoph,
> 
> Shouldn't SLUB falls back to other node also for the case it can't
> allocate memory? 

Yes SLUB will fall back but not during bootstrap. Bootstrap needs to 
carefully place structures on the right nodes. We fail during bootstrap 
because there is *no* memory available on it.
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