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

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Date:	Tue, 8 Aug 2006 12:36:15 +0200
From:	Andi Kleen <ak@...e.de>
To:	Eric Dumazet <dada1@...mosbay.com>
Cc:	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

>
> We may have special case for PRIVATE futexes (they dont need to be chained in 
> a global table, but a process private table)

What do you mean with PRIVATE futex? 

Even if the futex mapping is only visible by a single MM mmap_sem is still needed
to protect against other threads doing mmap.
 
-Andi
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