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