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. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>