Messages in this thread | | | Date | Tue, 15 Feb 2005 11:44:45 -0600 | From | Ray Bryant <> | Subject | Re: [RFC 2.6.11-rc2-mm2 0/7] mm: manual page migration -- overview |
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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 from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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