Messages in this thread | | | Date | Tue, 9 Apr 2013 14:28:06 +0000 | From | Christoph Lameter <> | Subject | Re: [PATCH 2/3] mm, slub: count freed pages via rcu as this task's reclaimed_slab |
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On Tue, 9 Apr 2013, Joonsoo Kim wrote:
> Currently, freed pages via rcu is not counted for reclaimed_slab, because > it is freed in rcu context, not current task context. But, this free is > initiated by this task, so counting this into this task's reclaimed_slab > is meaningful to decide whether we continue reclaim, or not. > So change code to count these pages for this task's reclaimed_slab.
slab->reclaim_state guides the reclaim actions in vmscan.c. With this patch slab->reclaim_state could get quite a high value without new pages being available for allocation. slab->reclaim_state will only be updated when the RCU period ends.
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