[PATCH] swsusp: fix memory shrinker

Fix a bug in the swsusp's memory shrinker that causes some systems using
highmem to refuse to suspend to disk if image_size is set above 1/2 of
available RAM.

Special thanks to Jiri Slaby for reporting the problem and assistance in
debugging it.

Signed-off-by: Rafael J. Wysocki <[email protected]>
Cc: Jiri Slaby <[email protected]>
Cc: Pavel Machek <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

diff --git a/kernel/power/swsusp.c b/kernel/power/swsusp.c
index 7fb834397a0d5f97701f0e604b138cb473647011..175370824f3720517d72fc7814a9227b29680dd3 100644 (file)
--- a/kernel/power/swsusp.c
+++ b/kernel/power/swsusp.c
@@ -229,13 +229,13 @@ int swsusp_shrink_memory(void)
                size += highmem_size;
                for_each_zone (zone)
                        if (populated_zone(zone)) {
+                               tmp += snapshot_additional_pages(zone);
                                if (is_highmem(zone)) {
                                        highmem_size -=
                                        zone_page_state(zone, NR_FREE_PAGES);
                                } else {
                                        tmp -= zone_page_state(zone, NR_FREE_PAGES);
                                        tmp += zone->lowmem_reserve[ZONE_NORMAL];
-                                       tmp += snapshot_additional_pages(zone);
                                }
                        }