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authorDennis Zhou <dennisz@fb.com>2017-06-20 02:28:30 +0300
committerTejun Heo <tj@kernel.org>2017-06-20 22:31:28 +0300
commit8fa3ed8014ac792a4c76d585b5c0f68bd202ff6b (patch)
tree97316c47b8c92e8d39b381d38f6ee889b1d195da /mm/percpu-internal.h
parent5ccd30e40e731051f6d1eb02f7ac073c1ef9deba (diff)
downloadlinux-8fa3ed8014ac792a4c76d585b5c0f68bd202ff6b.tar.xz
percpu: migrate percpu data structures to internal header
Migrates pcpu_chunk definition and a few percpu static variables to an internal header file from mm/percpu.c. These will be used with debugfs to expose statistics about percpu memory improving visibility regarding allocations and fragmentation. Signed-off-by: Dennis Zhou <dennisz@fb.com> Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'mm/percpu-internal.h')
-rw-r--r--mm/percpu-internal.h33
1 files changed, 33 insertions, 0 deletions
diff --git a/mm/percpu-internal.h b/mm/percpu-internal.h
new file mode 100644
index 000000000000..68bf18522a6d
--- /dev/null
+++ b/mm/percpu-internal.h
@@ -0,0 +1,33 @@
+#ifndef _MM_PERCPU_INTERNAL_H
+#define _MM_PERCPU_INTERNAL_H
+
+#include <linux/types.h>
+#include <linux/percpu.h>
+
+struct pcpu_chunk {
+ struct list_head list; /* linked to pcpu_slot lists */
+ int free_size; /* free bytes in the chunk */
+ int contig_hint; /* max contiguous size hint */
+ void *base_addr; /* base address of this chunk */
+
+ int map_used; /* # of map entries used before the sentry */
+ int map_alloc; /* # of map entries allocated */
+ int *map; /* allocation map */
+ struct list_head map_extend_list;/* on pcpu_map_extend_chunks */
+
+ void *data; /* chunk data */
+ int first_free; /* no free below this */
+ bool immutable; /* no [de]population allowed */
+ int nr_populated; /* # of populated pages */
+ unsigned long populated[]; /* populated bitmap */
+};
+
+extern spinlock_t pcpu_lock;
+
+extern struct list_head *pcpu_slot;
+extern int pcpu_nr_slots;
+
+extern struct pcpu_chunk *pcpu_first_chunk;
+extern struct pcpu_chunk *pcpu_reserved_chunk;
+
+#endif