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SubjectRe: Reclaim regression after 1c30844d2dfe
On Wed, Feb 12, 2020 at 02:45:39PM -0800, Ivan Babrou wrote:
> Here's a typical graph:
> * Green (numa0) and blue (numa1) for 4.19
> * Yellow (numa0) and orange (numa1) for 5.4
> These downward slopes on numa0 on 5.4 are somewhat typical to the
> worst case scenario.
> If I try to clean up data a bit from a bunch of machines, this is how
> numa0 compares to numa1 with 1h average values of free memory above
> 5GiB:
> *
> I think it's safe to say that numa0 is much much worse, but I cannot
> be 100% sure that numa1 is free from adverse effects, they may be just
> hiding in the noise caused by rolling reboots.

Ok, while I expected node 0 to be worse in general, a runaway boost due
to constant fragmentation would be a problem in general. In either case,
the patch should reduce the damage. Is there any chance that the patch
can be tested or would it be disruptive for you?

Mel Gorman

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