percpu: expose pcpu_nr_empty_pop_pages in pcpu_stats
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 <dennisszhou@gmail.com> Signed-off-by: Tejun Heo <tj@kernel.org>
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@ -36,6 +36,7 @@ extern spinlock_t pcpu_lock;
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extern struct list_head *pcpu_slot;
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extern struct list_head *pcpu_slot;
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extern int pcpu_nr_slots;
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extern int pcpu_nr_slots;
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extern int pcpu_nr_empty_pop_pages;
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extern struct pcpu_chunk *pcpu_first_chunk;
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extern struct pcpu_chunk *pcpu_first_chunk;
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extern struct pcpu_chunk *pcpu_reserved_chunk;
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extern struct pcpu_chunk *pcpu_reserved_chunk;
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@ -164,6 +164,7 @@ alloc_buffer:
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PU(nr_max_chunks);
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PU(nr_max_chunks);
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PU(min_alloc_size);
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PU(min_alloc_size);
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PU(max_alloc_size);
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PU(max_alloc_size);
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P("empty_pop_pages", pcpu_nr_empty_pop_pages);
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seq_putc(m, '\n');
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seq_putc(m, '\n');
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#undef PU
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#undef PU
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@ -160,7 +160,7 @@ static LIST_HEAD(pcpu_map_extend_chunks);
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* The number of empty populated pages, protected by pcpu_lock. The
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* The number of empty populated pages, protected by pcpu_lock. The
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* reserved chunk doesn't contribute to the count.
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* reserved chunk doesn't contribute to the count.
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*/
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*/
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static int pcpu_nr_empty_pop_pages;
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int pcpu_nr_empty_pop_pages;
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/*
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/*
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* Balance work is used to populate or destroy chunks asynchronously. We
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* Balance work is used to populate or destroy chunks asynchronously. We
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