[PATCH] swsusp: make image size limit tunable

Make the suspend image size limit tunable via /sys/power/image_size.

It is necessary for systems on which there is a limited amount of swap
available for suspend.  It can also be useful for optimizing performance of
swsusp on systems with 1 GB of RAM or more.

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

1 files changed, 2 insertions, 5 deletions

diff --git a/kernel/power/power.h b/kernel/power/power.h
index 9b0459903613..273a5b1d70be 100644
--- a/kernel/power/power.h
+++ b/kernel/power/power.h
@@ -52,11 +52,8 @@ extern const void __nosave_begin, __nosave_end;
 extern unsigned int nr_copy_pages;
 extern struct pbe *pagedir_nosave;
 
-/*
- * Preferred image size in MB (set it to zero to get the smallest
- * image possible)
- */
-#define IMAGE_SIZE      500
+/* Preferred image size in MB (default 500) */
+extern unsigned int image_size;
 
 extern asmlinkage int swsusp_arch_suspend(void);
 extern asmlinkage int swsusp_arch_resume(void);