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SubjectRe: [RFC PATCH v2 2/4] mm/__free_one_page: skip merge for order-0 page unless compaction failed
On Tue, Mar 20, 2018 at 10:59:16PM -0700, Figo.zhang wrote:
> 2018-03-20 21:53 GMT-07:00 Aaron Lu <aaron.lu@intel.com>:
>
> > On Tue, Mar 20, 2018 at 09:21:33PM -0700, Figo.zhang wrote:
> > > suppose that in free_one_page() will try to merge to high order anytime ,
> > > but now in your patch,
> > > those merge has postponed when system in low memory status, it is very
> > easy
> > > let system trigger
> > > low memory state and get poor performance.
> >
> > Merge or not merge, the size of free memory is not affected.
> >
>
> yes, the total free memory is not impact, but will influence the higher
> order allocation.

Yes, that's correct.

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