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percpu: expose pcpu_nr_empty_pop_pages in pcpu_stats

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Percpu memory holds a minimum threshold of pages that are populated
in order to serve atomic percpu memory requests. This change makes it
easier to verify that there are a minimum number of populated pages
lying around.

Signed-off-by: Dennis Zhou <[email protected]>
Signed-off-by: Tejun Heo <[email protected]>
This commit is contained in:
Dennis Zhou (Facebook) 2017-07-15 22:23:08 -04:00 • committed by Tejun Heo
commit 6b9b6f3994
3 changed files with 3 additions and 1 deletions
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1
mm/percpu-internal.h
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@ -36,6 +36,7 @@ extern spinlock_t pcpu_lock;
extern struct list_head *pcpu_slot;
extern int pcpu_nr_slots;
extern int pcpu_nr_empty_pop_pages;
extern struct pcpu_chunk *pcpu_first_chunk;
extern struct pcpu_chunk *pcpu_reserved_chunk;