Messages in this thread | | | Date | Wed, 27 Feb 2008 00:47:17 -0800 (PST) | From | David Rientjes <> | Subject | Re: [RFC][PATCH] page reclaim throttle take2 |
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On Wed, 27 Feb 2008, Balbir Singh wrote:
> Let's forget node hotplug for the moment, but what if someone > > 1. Changes the machine configuration and adds more nodes, do we expect the > kernel to be recompiled? Or is it easier to update /etc/sysctl.conf? > 2. Uses fake NUMA nodes and increases/decreases the number of nodes across > reboots. Should the kernel be recompiled? >
That is why the proposal was made to make this a static configuration option, such as CONFIG_NUM_RECLAIM_THREADS_PER_NODE, that will handle both situations.
> I am afraid it doesn't. Consider as you scale number of CPU's with the same > amount of memory, we'll end up making the reclaim problem worse. >
The benchmark that have been posted suggest that memory locality is more important than lock contention, as I've already mentioned.
David
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