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    SubjectRe: [PATCH v3] mm: fix tick timer stall during deferred page init
    On Thu, Mar 19, 2020 at 03:05:12PM -0400, Daniel Jordan wrote:
    > Regardless,
    > Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com>

    Darn, I spoke too soon.

    On a two-socket Xeon, smaller values of TICK_PAGE_COUNT caused the deferred
    init timestamp to grow by over 25%. This was with pgdatinit0 bound to the
    timer interrupt CPU to make sure the issue always reproduces.

    TICK_PAGE_COUNT node 0 deferred
    init time (ms)
    --------------- ---------------
    4096 610
    8192 587
    16384 487
    32768 480 // used in the patch

    Instead of trying to find a constant that lets the timer interrupt run often
    enough, I think a better way forward is to reconsider how we handle the resize
    lock. I plan to prototype something and reply back with what I get.

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