Re: [PATCH 15/16] x86: Unify node_to_cpumask_map handling between32 and 64bit

[David Rientjes]

On Thu, 30 Dec 2010, Tejun Heo wrote:

> Sigh, the new NUMA emulation thing is 64bit only. :-( I'll see if it
> can be applied to 32bit too.  BTW, how does this interact with the
> Shaohui's patchset.  Isn't that about NUMA emulation too?  Are these
> the same patches?
> 

There's nothing new about NUMA emulation on x86_64, it's existed for well 
over four years (we've been using it at Google since 2.6.18, see 
Documentation/x86/x86_64/fake-numa-for-cpusets).  Shaohui's patches are 
completely seperate and add hotplug emulation.  You _could_ boot with a 
very minimal amount of memory and then hotplug all the emulated nodes like 
numa=fake does, but you may find it difficult to parse the e820 and 
interleave the nodes appropriately over the set of physical nodes in 
userspace.
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/