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Date: Wed, 15 Sep 2010 22:53:24 +0930
From: Christopher Yeoh <cyeoh@au1.ibm.com>
To: Ingo Molnar <mingo@elte.hu>
Cc: linux-kernel@vger.kernel.org, Andrew Morton <akpm@linux-foundation.org>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>, linux-mm@kvack.org
Subject: Re: [RFC][PATCH] Cross Memory Attach
Message-ID: <20100915225324.60280a50@lilo>
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On Wed, 15 Sep 2010 10:16:53 +0200
Ingo Molnar <mingo@elte.hu> wrote:
> 
> btw., how does OpenMPI signal the target tasks that something
> happened to their address space - is there some pipe/socket
> side-channel, or perhaps purely based on flags in the modified memory
> areas, which are polled?

The shared memory btl signals through shared memory, though when
threading is enabled (I think its mostly used with threading support
disabled) in OpenMPI there is also signalling done through a pipe.

Regards,

Chris
-- 
cyeoh@au.ibm.com