Commit 6b9b6f39 authored by Dennis Zhou (Facebook)'s avatar Dennis Zhou (Facebook) Committed by Tejun Heo
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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: default avatarDennis Zhou <dennisszhou@gmail.com>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent 02459164

mm/percpu-internal.h

+1 −0
Original line number Diff line number Diff line
@@ -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;

mm/percpu-stats.c

+1 −0
Original line number Diff line number Diff line
@@ -164,6 +164,7 @@ static int percpu_stats_show(struct seq_file *m, void *v) 
	PU(nr_max_chunks);

	PU(min_alloc_size);

	PU(max_alloc_size);

	P("empty_pop_pages", pcpu_nr_empty_pop_pages);

	seq_putc(m, '\n');



#undef PU

mm/percpu.c

+1 −1
Original line number Diff line number Diff line
@@ -160,7 +160,7 @@ static LIST_HEAD(pcpu_map_extend_chunks); 
 * The number of empty populated pages, protected by pcpu_lock.  The

 * reserved chunk doesn't contribute to the count.

 */

static int pcpu_nr_empty_pop_pages;

int pcpu_nr_empty_pop_pages;



/*

 * Balance work is used to populate or destroy chunks asynchronously.  We