On Fri, 25 May 2018 15:08:53 +0200 Vlastimil Babka <vbabka@xxxxxxx> wrote: > we might consider this for 4.17 although I don't know if there's anything > currently broken. Stable backports should be more important, but will have to > be reviewed carefully, as the code went through many changes. > BTW I think that also the ac->preferred_zoneref reset is currently useless if > we don't also reset ac->nodemask from a mempolicy to NULL first (which we > probably should for the OOM victims etc?), but I would leave that for a > separate patch. Confused. If nothing is currently broken then why is a backport needed? Presumably because we expect breakage in the future? Can you expand on this?