From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail138.messagelabs.com (mail138.messagelabs.com [216.82.249.35]) by kanga.kvack.org (Postfix) with ESMTP id 5320B6B004A for ; Wed, 15 Sep 2010 09:23:37 -0400 (EDT) Received: from d23relay05.au.ibm.com (d23relay05.au.ibm.com [202.81.31.247]) by e23smtp06.au.ibm.com (8.14.4/8.13.1) with ESMTP id o8FDNSD9028727 for ; Wed, 15 Sep 2010 23:23:28 +1000 Received: from d23av03.au.ibm.com (d23av03.au.ibm.com [9.190.234.97]) by d23relay05.au.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id o8FDNX921040386 for ; Wed, 15 Sep 2010 23:23:33 +1000 Received: from d23av03.au.ibm.com (loopback [127.0.0.1]) by d23av03.au.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id o8FDNXLS017843 for ; Wed, 15 Sep 2010 23:23:33 +1000 Date: Wed, 15 Sep 2010 22:53:24 +0930 From: Christopher Yeoh Subject: Re: [RFC][PATCH] Cross Memory Attach Message-ID: <20100915225324.60280a50@lilo> In-Reply-To: <20100915081653.GA16406@elte.hu> References: <20100915104855.41de3ebf@lilo> <20100915080235.GA13152@elte.hu> <20100915081653.GA16406@elte.hu> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org To: Ingo Molnar Cc: linux-kernel@vger.kernel.org, Andrew Morton , Linus Torvalds , Peter Zijlstra , linux-mm@kvack.org List-ID: On Wed, 15 Sep 2010 10:16:53 +0200 Ingo Molnar 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 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org