From: Rafael J. Wysocki <rjw@sisk.pl>
Date: Fri, 23 Jun 2006 09:04:46 +0000 (-0700)
Subject: [PATCH] swsusp: take lowmem reserves into account
X-Git-Tag: firefly_0821_release~35458^2~103
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=a938c356d5b007fe6d28251c0ddbf6c11d0d92b5;p=firefly-linux-kernel-4.4.55.git

[PATCH] swsusp: take lowmem reserves into account

swsusp allocates memory from the normal zone, so it cannot use lowmem
reserve pages from the lower zones.  Therefore it should not count these
pages as available to it.

Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Pavel Machek <pavel@ucw.cz>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/kernel/power/swsusp.c b/kernel/power/swsusp.c
index 78b6e71b0813..f0ee4e7780d6 100644
--- a/kernel/power/swsusp.c
+++ b/kernel/power/swsusp.c
@@ -188,8 +188,10 @@ int swsusp_shrink_memory(void)
 			PAGES_FOR_IO;
 		tmp = size;
 		for_each_zone (zone)
-			if (!is_highmem(zone))
+			if (!is_highmem(zone) && populated_zone(zone)) {
 				tmp -= zone->free_pages;
+				tmp += zone->lowmem_reserve[ZONE_NORMAL];
+			}
 		if (tmp > 0) {
 			tmp = __shrink_memory(tmp);
 			if (!tmp)