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Date: Sat, 21 Feb 2009 16:33:41 +0900 From: Tejun Heo <tj@...nel.org> To: Ingo Molnar <mingo@...e.hu> CC: rusty@...tcorp.com.au, tglx@...utronix.de, x86@...nel.org, linux-kernel@...r.kernel.org, hpa@...or.com, jeremy@...p.org, cpw@....com Subject: Re: [PATCHSET x86/core/percpu] implement dynamic percpu allocator Tejun Heo wrote: > I can remove the TLB problem from non-NUMA case but for NUMA I still > don't have a good idea. Maybe we need to accept the overhead for > NUMA? I don't know. Hmmmm... one thing we can do on NUMA is to remap and free the remapped address and make __pa() and __va() handle that area specially. It's a bit convoluted but the added overhead should be minimal. It'll only be simple range check in __pa()/__va() and it's not like they are super hot paths anyway. I'll give it a shot. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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