Re: [Lhms-devel] [PATCH 0/7] Fragmentation Avoidance V19

[Ingo Molnar]

* Mel Gorman <mel@xxxxxxxxx> wrote:

> The set of patches do fix a lot and make a strong start at addressing 
> the fragmentation problem, just not 100% of the way. [...]

do you have an expectation to be able to solve the 'fragmentation 
problem', all the time, in a 100% way, now or in the future?

> So, with this set of patches, how fragmented you get is dependant on 
> the workload and it may still break down and high order allocations 
> will fail. But the current situation is that it will defiantly break 
> down. The fact is that it has been reported that memory hotplug remove 
> works with these patches and doesn't without them. Granted, this is 
> just one feature on a high-end machine, but it is one solid operation 
> we can perform with the patches and cannot without them. [...]

can you always, under any circumstance hot unplug RAM with these patches 
applied? If not, do you have any expectation to reach 100%?

	Ingo
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