Messages in this thread | | | Date | Tue, 19 Feb 2008 08:31:24 -0500 | From | Rik van Riel <> | Subject | Re: [RFC][PATCH] the proposal of improve page reclaim by throttle |
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On Tue, 19 Feb 2008 17:34:59 +1100 Nick Piggin <nickpiggin@yahoo.com.au> wrote:
> On Tuesday 19 February 2008 16:44, KOSAKI Motohiro wrote: > > background > > ======================================== > > current VM implementation doesn't has limit of # of parallel reclaim. > > when heavy workload, it bring to 2 bad things > > - heavy lock contention > > - unnecessary swap out
> I think it should maybe be a per-zone thing... > > What happens if you make it a per-zone mutex, and allow just a single > process to reclaim pages from a given zone at a time? I guess that is > going to slow down throughput a little bit in some cases though...
I agree, doing things per zone will probably work better, because that way one process can do page reclaim on every NUMA node at the same time.
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