Re: [RFC 00/15] x86_64: Optimize percpu accesses

[Christoph Lameter]

H. Peter Anvin wrote:

> I'm much more concerned about wasting an average of 1 MB of memory per CPU.

Well all the memory that is now allocated via allocpercpu()s will be allocated from  that 2MB segment. And cpu_alloc packs variables in a dense way. The current slab allocations try to avoid sharing cachelines which wastes lots of memory for every allocation for each and every processor.


--
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/