[Bug 204121] numa(4) is broken

bugzilla-noreply at freebsd.org bugzilla-noreply at freebsd.org
Thu Nov 5 07:03:41 UTC 2015


--- Comment #4 from Adrian Chadd <adrian at freebsd.org> ---
Right. So this was in here way before my numa stuff let you configure things.

The problem is that the memory allocation isn't being perfectly balanced
between numa domains and the VM thresholds are global. So, the VM thresholds
say "there's pages", but when you go to allocate, there aren't any from the
given domain.

Now, the odd situation here is that the page allocation should be "first touch
round robin" so it should be failing back to allocating from another domain and
only returning NULL if it couldn't find anything.

Can you try this on stable/10 with MAXMEMDOM set to something in your kernel
config? I'd like to see if you hit the same issue.

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