Messages in this thread | | | Date | Wed, 25 Nov 2015 19:03:50 +0100 | From | Michal Hocko <> | Subject | Re: [PATCH] mm/vmstat: retrieve more accurate vmstat value |
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On Wed 25-11-15 10:04:44, Christoph Lameter wrote: > On Wed, 25 Nov 2015, Joonsoo Kim wrote: > > > I think that maintaining duplicate counter to guarantee accuracy isn't > > reasonable solution. It would cause more overhead to the system. > > Simply remove the counter from the vmstat handling and do it differently > then.
We definitely do not want yet another set of counters. vmstat counters are not only to be exported into the userspace. We have in kernel users as well. I do agree that there are users who can cope with some level of imprecision though and those which depend on the accuracy can use zone_page_state_snapshot which doesn't impose any overhead on others. [...] -- Michal Hocko SUSE Labs
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