Messages in this thread | | | Date | Sun, 04 Nov 2012 11:36:47 -0500 | From | Rik van Riel <> | Subject | Re: kswapd0: excessive CPU usage |
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On 10/30/2012 03:18 PM, Mel Gorman wrote:
> restart: > - wake_all_kswapd(order, zonelist, high_zoneidx, > + /* > + * kswapd is woken except when this is a THP request and compaction > + * is deferred. If we are backing off reclaim/compaction then kswapd > + * should not be awake aggressively reclaiming with no consumers of > + * the freed pages > + */ > + if (!(is_thp_alloc(gfp_mask, order) && > + compaction_deferred(preferred_zone, order))) > + wake_all_kswapd(order, zonelist, high_zoneidx, > zone_idx(preferred_zone));
What is special about thp allocations here?
Surely other large allocations that keep failing should get the same treatment, of not waking up kswapd if compaction is deferred?
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