From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <4212350D.3060501@sgi.com> Date: Tue, 15 Feb 2005 11:44:45 -0600 From: Ray Bryant MIME-Version: 1.0 Subject: Re: [RFC 2.6.11-rc2-mm2 0/7] mm: manual page migration -- overview References: <20050212032535.18524.12046.26397@tomahawk.engr.sgi.com> <42114279.5070202@sgi.com> <20050215110506.GD19658@lnx-holt.americas.sgi.com> In-Reply-To: <20050215110506.GD19658@lnx-holt.americas.sgi.com> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: Robin Holt Cc: Andi Kleen , Ray Bryant , linux-mm , linux-kernel List-ID: Robin Holt wrote: > On Mon, Feb 14, 2005 at 06:29:45PM -0600, Ray Bryant wrote: > >>which is what you are asking for, I think. The library's job >>(in addition to suspending all of the processes in the list for >>the duration of the migration operation, plus do some other things >>that are specific to sn2 hardware) would be to examine the > > > You probably want the batch scheduler to do the suspend/resume as it > may be parking part of the job on nodes that have memory but running > processes of a different job while moving a job out of the way for a > big-mem app that wants to run on one of this jobs nodes. > That works as well, and if we keep the majority of the work on deciding who to migrate where and what to do when in a user space library rather than in the kernel, then we have a lot more flexibility in, for example who suspends/resumes the jobs to be migrated. > >>do memory placement by first touch, during initialization. This is, >>in part, because most of our codes originate on non-NUMA systems, >>and we've typically done very just what is necessary to make them > > > Software Vendors tend to be very reluctant to do things for a single > architecture unless there are clear wins. > > Thanks, > Robin > -- ----------------------------------------------- Ray Bryant 512-453-9679 (work) 512-507-7807 (cell) raybry@sgi.com raybry@austin.rr.com The box said: "Requires Windows 98 or better", so I installed Linux. ----------------------------------------------- -- 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: aart@kvack.org