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    SubjectRe: [patch 3/3] vmstat: Create our own workqueue
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    Christoph Lameter wrote:
    > On Sat, 31 Oct 2015, Tetsuo Handa wrote:
    >
    > > Then, you need to update below description (or drop it) because
    > > patch 3/3 alone will not guarantee that the counters are up to date.
    >
    > The vmstat system does not guarantee that the counters are up to date
    > always. The whole point is the deferral of updates for performance
    > reasons. They are updated *at some point* within stat_interval. That needs
    > to happen and that is what this patchset is fixing.
    >
    I'm still unclear. I think that the result of this patchset is

    The counters are never updated even after stat_interval
    if some workqueue item is doing a __GFP_WAIT memory allocation.

    but the patch description sounds as if

    The counters will be updated even if some workqueue item is
    doing a __GFP_WAIT memory allocation.

    which denies the actual result I tested with this patchset applied.


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