Re: [RFC][PATCH 4/5] memory_pressure_notify() caller

[KOSAKI Motohiro]

Hi Daniel

> > > The notification fires after only ~100 MB allocated, i.e., when page
> > > reclaim is beginning to nag from page cache. Isn't this a bit early?
> > > Repeating the test with swap enabled results in a notification after
> > > ~600 MB allocated, which is more reasonable and just before the system
> > > starts to swap.
> >
> > Your issue may have more to do with the fact that the
> > highmem zone is 128MB in size and some balancing issues
> > between __alloc_pages and try_to_free_pages.
> 
> I don't think so. I ran the test again without highmem and noticed the
> same behaviour:

Thank you for good point out!
Could you please post your test program and reproduced method?

unfortunately,
my simple test is so good works in swapless system ;-)

thanks.



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