[PATCH] Fix boot problem in situations where the boot CPU is running on a memoryless node

Christoph Lameter clameter at sgi.com
Thu Jan 24 05:51:32 EST 2008

On Wed, 23 Jan 2008, Pekka J Enberg wrote:

> Fine. But, why are we hitting fallback_alloc() in the first place? It's 
> definitely not because of missing ->nodelists as we do:
>         cache_cache.nodelists[node] = &initkmem_list3[CACHE_CACHE];
> before attempting to set up kmalloc caches. Now, if I understood 
> correctly, we're booting off a memoryless node so kmem_getpages() will 
> return NULL thus forcing us to fallback_alloc() which is unavailable at 
> this point.
> As far as I can tell, there are two ways to fix this:
>   (1) don't boot off a memoryless node (why are we doing this in the first 
>       place?)

Right. That is the solution that I would prefer.

>   (2) initialize cache_cache.nodelists with initmem_list3 equivalents
>       for *each node hat has normal memory*

Or simply do it for all. SLAB bootstrap is very complex thing though.

> I am still wondering why this worked before, though.

I doubt it did ever work for SLAB.

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