linux-kernel - Re: kmem_cache_init failure (was Re: 2.6.21-mm1)

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Message-Id: <20070508123555.dfb7d5bb.akpm@linux-foundation.org>
Date:	Tue, 8 May 2007 12:35:55 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Frederik Deweerdt <deweerdt@...e.fr>
Cc:	linux-kernel@...r.kernel.org, jbeulich@...ell.com, ak@...e.de
Subject: Re: kmem_cache_init failure (was Re: 2.6.21-mm1)

On Tue, 8 May 2007 19:22:33 +0200
Frederik Deweerdt <deweerdt@...e.fr> wrote:

> On Sat, May 05, 2007 at 01:49:55AM -0700, Andrew Morton wrote:
> > 
> > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.21/2.6.21-mm1/
> > 
> Hi all,
> 
> My computer fails early at boot with a stack along the lines of:
> 
> kmem_cache_zalloc
> kmem_cache_create
> kmem_cache_init
> start_kernel
> 
> eip is at cache_calloc_refill+0x3e1 which is the 
> slabp->colouroff = colouroff; in alloc_slabmgmt()
> 
> I've bisected it down to the x86_64-mm-cpa-kerneltext.patch and the 
> 
> +       if (!pte_present(*kpte))
> +               return 0;
>
> part in particular. Dotconfig and cpuinfo are available at
> http://fdeweerdt.free.fr/kmem_prob/.  Any ideas?

Thanks for working that out - it helps heaps.

x86_64-mm-cpa-kerneltext.patch seems to have been dropped from Andi's tree.
It might come back, so please let's keep an eye out for that.

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