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

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Date:	Wed, 09 Aug 2006 02:26:43 +1000
From:	Nick Piggin <nickpiggin@...oo.com.au>
To:	Ulrich Drepper <drepper@...il.com>
CC:	Eric Dumazet <dada1@...mosbay.com>, Andi Kleen <ak@...e.de>,
	Ravikiran G Thirumalai <kiran@...lex86.org>,
	"Shai Fultheim (Shai@...lex86.org)" <shai@...lex86.org>,
	pravin b shelar <pravin.shelar@...softinc.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [RFC] NUMA futex hashing

Nick Piggin wrote:

> No we shouldn't slow them down. I'd be interested to see whether
> locking is significantly sped up with this new data structure,
> though.

OTOH, maybe you don't need a new data structure. Maybe you could
use the hash and check that for a match on a private futex before
trying to find a possible shared futex.

Locking I guess becomes no more of a problem than now, and in some
cases maybe much less. So OK, I stand corrected.

-- 
SUSE Labs, Novell Inc.
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