linux-kernel - Re: [RFC] NUMA futex hashing

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Date:	08 Aug 2006 11:58:39 +0200
From:	Andi Kleen <ak@...e.de>
To:	Jes Sorensen <jes@....com>
Cc:	linux-kernel@...r.kernel.org,
	"Shai Fultheim (Shai@...lex86.org)" <shai@...lex86.org>,
	pravin b shelar <pravin.shelar@...softinc.com>
Subject: Re: [RFC] NUMA futex hashing

Jes Sorensen <jes@....com> writes:
> 
> Using that argument, all you need to do is to add the alignment
> ____cacheline_aligned_in_smp to the definition of
> struct futex_hash_bucket and the problem is solved, given that the
> internode cacheline in a NUMA system is defined to be the same as the
> SMP cacheline size.

Yes but it would waste quite a lot of memory and cache.
Wasted cache = slow.

-Andi
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