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Re: [RFC][PATCH] page reclaim throttle take2

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To: David Rientjes <rientjes@...>
Cc: KOSAKI Motohiro <kosaki.motohiro@...>, KAMEZAWA Hiroyuki <kamezawa.hiroyu@...>, Peter Zijlstra <a.p.zijlstra@...>, <linux-kernel@...>, <linux-mm@...>, Rik van Riel <riel@...>, Lee Schermerhorn <Lee.Schermerhorn@...>, Nick Piggin <npiggin@...>
Date: Wednesday, February 27, 2008 - 1:48 am

David Rientjes wrote:


Things are changing, with memory hot-add remove, CPU hotplug , the topology can
change and is no longer static. One can create fake NUMA nodes on the fly using
a boot option as well.

Since we're talking of parallel reclaims, I think it's a function of CPUs and
Nodes. I'd rather keep it as a sysctl with a good default value based on the
topology. If we end up getting it wrong, the system administrator has a choice.
That is better than expecting him/her to recompile the kernel and boot that. A
sysctl does not create problems either w.r.t changing the number of threads, no
hard to solve race-conditions - it is fairly straight forward




-- 
	Warm Regards,
	Balbir Singh
	Linux Technology Center
	IBM, ISTL
--
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Messages in current thread:
[RFC][PATCH] page reclaim throttle take2 , KOSAKI Motohiro, (Mon Feb 25, 10:32 pm)
Re: [RFC][PATCH] page reclaim throttle take2, Peter Zijlstra, (Tue Feb 26, 5:18 pm)
Re: [RFC][PATCH] page reclaim throttle take2, KOSAKI Motohiro, (Wed Feb 27, 12:26 am)
Re: [RFC][PATCH] page reclaim throttle take2, Balbir Singh, (Wed Feb 27, 12:27 am)
Re: [RFC][PATCH] page reclaim throttle take2, KOSAKI Motohiro, (Wed Feb 27, 12:45 am)
Re: [RFC][PATCH] page reclaim throttle take2, KAMEZAWA Hiroyuki, (Wed Feb 27, 1:00 am)
Re: [RFC][PATCH] page reclaim throttle take2, KOSAKI Motohiro, (Wed Feb 27, 1:04 am)
Re: [RFC][PATCH] page reclaim throttle take2, Balbir Singh, (Wed Feb 27, 1:03 am)
Re: [RFC][PATCH] page reclaim throttle take2, David Rientjes, (Wed Feb 27, 1:19 am)
Re: [RFC][PATCH] page reclaim throttle take2, KOSAKI Motohiro, (Wed Feb 27, 1:33 am)
Re: [RFC][PATCH] page reclaim throttle take2, David Rientjes, (Wed Feb 27, 1:47 am)
Re: [RFC][PATCH] page reclaim throttle take2, Balbir Singh, (Wed Feb 27, 1:48 am)
Re: [RFC][PATCH] page reclaim throttle take2, KOSAKI Motohiro, (Wed Feb 27, 2:52 am)
Re: [RFC][PATCH] page reclaim throttle take2, David Rientjes, (Wed Feb 27, 2:09 am)
Re: [RFC][PATCH] page reclaim throttle take2, Balbir Singh, (Wed Feb 27, 3:59 am)
Re: [RFC][PATCH] page reclaim throttle take2, David Rientjes, (Wed Feb 27, 4:47 am)
Re: [RFC][PATCH] page reclaim throttle take2, Balbir Singh, (Wed Feb 27, 5:01 am)
Re: [RFC][PATCH] page reclaim throttle take2, Peter Zijlstra, (Wed Feb 27, 5:44 am)
Re: [RFC][PATCH] page reclaim throttle take2, KOSAKI Motohiro, (Wed Feb 27, 3:10 am)
Re: [RFC][PATCH] page reclaim throttle take2, David Rientjes, (Wed Feb 27, 3:19 am)
Re: [RFC][PATCH] page reclaim throttle take2, Rik van Riel, (Wed Feb 27, 11:30 am)
Re: [RFC][PATCH] page reclaim throttle take2, KAMEZAWA Hiroyuki, (Wed Feb 27, 3:51 am)
Re: [RFC][PATCH] page reclaim throttle take2, David Rientjes, (Wed Feb 27, 3:56 am)
Re: [RFC][PATCH] page reclaim throttle take2, KAMEZAWA Hiroyuki, (Wed Feb 27, 4:09 am)
Re: [RFC][PATCH] page reclaim throttle take2, KOSAKI Motohiro, (Wed Feb 27, 1:13 am)
Re: [RFC][PATCH] page reclaim throttle take2, KAMEZAWA Hiroyuki, (Tue Feb 26, 8:50 pm)
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