On 01/18/2015 01:18 AM, Christoph Lameter wrote:
On Sat, 17 Jan 2015, Vinayak Menon wrote:
which had not updated the vmstat_diff. This CPU was in idle for around 30
secs. When I looked at the tvec base for this CPU, the timer associated with
vmstat_update had its expiry time less than current jiffies. This timer had
its deferrable flag set, and was tied to the next non-deferrable timer in the
We can remove the deferrrable flag now since the vmstat threads are only
activated as necessary with the recent changes. Looks like this could fix
your issue?
Yes, this should fix my issue.
But I think we may need the fix in too_many_isolated, since there can
still be a delay of few seconds (HZ by default and even more because of
reasons pointed out by Michal) which will result in reclaimers
unnecessarily entering congestion_wait. No ?
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