mm: introduce helper function mem_init_print_info() to simplify mem_init()
Introduce helper function mem_init_print_info() to simplify mem_init()
across different architectures, which also unifies the format and
information printed.
Function mem_init_print_info() calculates memory statistics information
without walking each page, so it should be a little faster on some
architectures.
Also introduce another helper get_num_physpages() to kill the global
variable num_physpages.
Signed-off-by: Jiang Liu <jiang.liu@huawei.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Michel Lespinasse <walken@google.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 4310f80..09c2353 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1323,6 +1323,7 @@
#endif
extern void adjust_managed_page_count(struct page *page, long count);
+extern void mem_init_print_info(const char *str);
/* Free the reserved page into the buddy system, so it gets managed. */
static inline void __free_reserved_page(struct page *page)
@@ -1358,6 +1359,17 @@
poison, "unused kernel");
}
+static inline unsigned long get_num_physpages(void)
+{
+ int nid;
+ unsigned long phys_pages = 0;
+
+ for_each_online_node(nid)
+ phys_pages += node_present_pages(nid);
+
+ return phys_pages;
+}
+
#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
/*
* With CONFIG_HAVE_MEMBLOCK_NODE_MAP set, an architecture may initialise its