PM / Hibernate: Compress hibernation image with LZO
Compress hibernation image with LZO in order to save on I/O and
therefore time to hibernate/thaw.
[rjw: Added hibernate=nocompress command line option instead of just
nocompress which would be confusing, fixed a couple of compiler
warnings, fixed kerneldoc comments, minor cleanups.]
Signed-off-by: Bojan Smojver <bojan@rexursive.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
diff --git a/kernel/power/hibernate.c b/kernel/power/hibernate.c
index 8dc31e0..6c9c9dc 100644
--- a/kernel/power/hibernate.c
+++ b/kernel/power/hibernate.c
@@ -29,6 +29,7 @@
#include "power.h"
+static int nocompress = 0;
static int noresume = 0;
static char resume_file[256] = CONFIG_PM_STD_PARTITION;
dev_t swsusp_resume_device;
@@ -638,6 +639,8 @@
if (hibernation_mode == HIBERNATION_PLATFORM)
flags |= SF_PLATFORM_MODE;
+ if (nocompress)
+ flags |= SF_NOCOMPRESS_MODE;
pr_debug("PM: writing image.\n");
error = swsusp_write(flags);
swsusp_free();
@@ -1004,6 +1007,15 @@
return 1;
}
+static int __init hibernate_setup(char *str)
+{
+ if (!strncmp(str, "noresume", 8))
+ noresume = 1;
+ else if (!strncmp(str, "nocompress", 10))
+ nocompress = 1;
+ return 1;
+}
+
static int __init noresume_setup(char *str)
{
noresume = 1;
@@ -1013,3 +1025,4 @@
__setup("noresume", noresume_setup);
__setup("resume_offset=", resume_offset_setup);
__setup("resume=", resume_setup);
+__setup("hibernate=", hibernate_setup);
