Re: [Xen-devel] [PATCH 1 of 3 v5/leftover] libxl: enable automatic placement of guests on NUMA nodes [and 1 more messages]

[Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>]

Dario Faggioli writes ("Re: [PATCH 1 of 3 v5/leftover] libxl: enable automatic 
placement of guests on NUMA nodes [and 1 more messages]"):
...
> So basically I'm saying that it does have that property but that is
> bringing benefits right now, and we have all the knobs to limit its
> potential nasty effects for future (bigger) system at any time.

I think that it is essential that we do not have a situation where the
default behaviour is ever to hang while it searches zillions of
combinations.  That would be a release critical bug IMO.

So I don't think "we will fix this after the series goes in" is
acceptable.  We should not be introducing new RC bugs during the
freeze.

> What could be done is restricting automatic placement to guests that
> fits on 4 or 8 nodes for 4.2. Then, for 4.3 (and with a very small
> backport effort to 4.2.1), implement a lighter solution for dealing with
> the ones that does not.

That would be acceptable.

Ian.

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel