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

Christoph Lameter
2008-01-23T18:51:42Z

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.