Re: [PATCH v2] mm: vmscan: fix the page state calculation in too_many_isolated

[Christoph Lameter]

On Wed, 21 Jan 2015, Michal Hocko wrote:

> I think we can solve this as well. We can stick vmstat_shepherd into a
> kernel thread with a loop with the configured timeout and then create a
> mask of CPUs which need the update and run vmstat_update from
> IPI context (smp_call_function_many).

Please do not run the vmstat_updates concurrently. They update shared
cachelines and therefore can cause bouncing cachelines if run concurrently
on multiple cpus.
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