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| author | Minchan Kim <minchan.kim@gmail.com> | 2009-06-16 15:32:49 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2009-06-16 19:47:42 -0700 |
| commit | 96cb4df5ddf5e6d5785b5acd4003e3689b87f896 (patch) | |
| tree | e6bd74df480e9065617aebec29b4285fa021c919 /mm | |
| parent | bc75d33f0fc1d56e734db1f56d3cfc8097b8e0cf (diff) | |
| download | lwn-96cb4df5ddf5e6d5785b5acd4003e3689b87f896.tar.gz lwn-96cb4df5ddf5e6d5785b5acd4003e3689b87f896.zip | |
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: Minchan Kim <minchan.kim@gmail.com>
Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/page_alloc.c | 28 |
1 files changed, 16 insertions, 12 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c index 8629c84fd9ba..303607f1d323 100644 --- a/mm/page_alloc.c +++ b/mm/page_alloc.c @@ -4478,22 +4478,26 @@ void setup_per_zone_wmarks(void) * 1TB 101 10GB * 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) { - unsigned int gb, ratio; + /* Zone size in gigabytes */ + gb = zone->present_pages >> (30 - PAGE_SHIFT); + if (gb) + ratio = int_sqrt(10 * gb); + else + ratio = 1; - /* Zone size in gigabytes */ - gb = zone->present_pages >> (30 - PAGE_SHIFT); - if (gb) - ratio = int_sqrt(10 * gb); - else - ratio = 1; + zone->inactive_ratio = ratio; +} - 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); } /* |