Re: [PATCH 0/4] reintroduce compaction feedback for OOM decisions

[Vlastimil Babka]

On 09/21/2016 07:18 PM, Michal Hocko wrote:
> On Tue 06-09-16 15:52:54, Vlastimil Babka wrote:
> 
> We still do not ignore fragindex in the full priority. This part has
> always been quite unclear to me so I cannot really tell whether that
> makes any difference or not but just to be on the safe side I would
> preffer to have _all_ the shortcuts out of the way in the highest
> priority. It is true that this will cause COMPACT_NOT_SUITABLE_ZONE
> so keep retrying but still a complication to understand the workflow.
> 
> What do you think?
 
I was thinking that this shouldn't be a problem on non-costly orders and default
extfrag_threshold. But better be safe. Moreover I think the issue is much more
dangerous for compact_zonelist_suitable() as explained below.

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