Commit 96cb4df5 authored by Minchan Kim's avatar Minchan Kim Committed by Linus Torvalds

page-allocator: add inactive ratio calculation function of each zone

Factor the per-zone arithemetic inside setup_per_zone_inactive_ratio()'s
loop into a a separate function, calculate_zone_inactive_ratio().  This
function will be used in a later patch

[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: default avatarMinchan Kim <minchan.kim@gmail.com>
Reviewed-by: default avatarKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent bc75d33f
...@@ -1053,6 +1053,7 @@ extern void set_dma_reserve(unsigned long new_dma_reserve); ...@@ -1053,6 +1053,7 @@ extern void set_dma_reserve(unsigned long new_dma_reserve);
extern void memmap_init_zone(unsigned long, int, unsigned long, extern void memmap_init_zone(unsigned long, int, unsigned long,
unsigned long, enum memmap_context); unsigned long, enum memmap_context);
extern void setup_per_zone_wmarks(void); extern void setup_per_zone_wmarks(void);
extern void calculate_zone_inactive_ratio(struct zone *zone);
extern void mem_init(void); extern void mem_init(void);
extern void __init mmap_init(void); extern void __init mmap_init(void);
extern void show_mem(void); extern void show_mem(void);
......
...@@ -4478,22 +4478,26 @@ void setup_per_zone_wmarks(void) ...@@ -4478,22 +4478,26 @@ void setup_per_zone_wmarks(void)
* 1TB 101 10GB * 1TB 101 10GB
* 10TB 320 32GB * 10TB 320 32GB
*/ */
static void __init setup_per_zone_inactive_ratio(void) void calculate_zone_inactive_ratio(struct zone *zone)
{ {
struct zone *zone; unsigned int gb, ratio;
for_each_zone(zone) { /* Zone size in gigabytes */
unsigned int gb, ratio; gb = zone->present_pages >> (30 - PAGE_SHIFT);
if (gb)
ratio = int_sqrt(10 * gb);
else
ratio = 1;
/* Zone size in gigabytes */ zone->inactive_ratio = ratio;
gb = zone->present_pages >> (30 - PAGE_SHIFT); }
if (gb)
ratio = int_sqrt(10 * gb);
else
ratio = 1;
zone->inactive_ratio = ratio; static void __init setup_per_zone_inactive_ratio(void)
} {
struct zone *zone;
for_each_zone(zone)
calculate_zone_inactive_ratio(zone);
} }
/* /*
......
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