[PATCH] swsusp: debugging

Add a swsusp debugging mode.  This does everything that's needed for a suspend
except for actually suspending.  So we can look in the log messages and work
out a) what code is being slow and b) which drivers are misbehaving.

(1)
# echo testproc > /sys/power/disk
# echo disk > /sys/power/state

This should turn off the non-boot CPU, freeze all processes, wait for 5
seconds and then thaw the processes and the CPU.

(2)
# echo test > /sys/power/disk
# echo disk > /sys/power/state

This should turn off the non-boot CPU, freeze all processes, shrink
memory, suspend all devices, wait for 5 seconds, resume the devices etc.

Cc: Pavel Machek <pavel@ucw.cz>
Cc: Stefan Seyfried <seife@suse.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 3 insertions, 1 deletions

diff --git a/include/linux/pm.h b/include/linux/pm.h
index 6b27e07aef19..070394e846d0 100644
--- a/include/linux/pm.h
+++ b/include/linux/pm.h
@@ -116,7 +116,9 @@ typedef int __bitwise suspend_disk_method_t;
 #define PM_DISK_PLATFORM        ((__force suspend_disk_method_t) 2)
 #define PM_DISK_SHUTDOWN        ((__force suspend_disk_method_t) 3)
 #define PM_DISK_REBOOT          ((__force suspend_disk_method_t) 4)
-#define PM_DISK_MAX             ((__force suspend_disk_method_t) 5)
+#define PM_DISK_TEST            ((__force suspend_disk_method_t) 5)
+#define PM_DISK_TESTPROC        ((__force suspend_disk_method_t) 6)
+#define PM_DISK_MAX             ((__force suspend_disk_method_t) 7)
 
 struct pm_ops {
         suspend_disk_method_t pm_disk_mode;