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authorRafael J. Wysocki <rjw@sisk.pl>2006-01-06 00:14:20 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-06 08:33:40 -0800
commite5e2fa7857f6bf46605c77d949fa6698b9b0bc28 (patch)
treee5d32d980939ce44ee8b60e7f1fd0732760f7607
parent72a97e08394a3b2e75481ff680ec2a0591e3cba4 (diff)
[PATCH] swsusp: fix enough_free_mem
This patch fixes a problem with the function enough_free_mem() used by swsusp to verify if there is a sufficient number of memory pages available to it to create and save the suspend image. Namely, enough_free_mem() uses nr_free_pages() to obtain the number of free memory pages, which is incorrect, because this function returns the total number of free pages, including free highmem pages, and the highmem pages cannot be used by swsusp for storing the image data. The patch makes enough_free_mem() avoid counting the free highmem pages as available to swsusp. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
-rw-r--r--kernel/power/snapshot.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/kernel/power/snapshot.c b/kernel/power/snapshot.c
index e80d282dbf5..41f66365f0d 100644
--- a/kernel/power/snapshot.c
+++ b/kernel/power/snapshot.c
@@ -428,8 +428,14 @@ void swsusp_free(void)
static int enough_free_mem(unsigned int nr_pages)
{
- pr_debug("swsusp: available memory: %u pages\n", nr_free_pages());
- return nr_free_pages() > (nr_pages + PAGES_FOR_IO +
+ struct zone *zone;
+ unsigned int n = 0;
+
+ for_each_zone (zone)
+ if (!is_highmem(zone))
+ n += zone->free_pages;
+ pr_debug("swsusp: available memory: %u pages\n", n);
+ return n > (nr_pages + PAGES_FOR_IO +
(nr_pages + PBES_PER_PAGE - 1) / PBES_PER_PAGE);
}