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[PATCH] swsusp: debugging

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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>
This commit is contained in:
Rafael J. Wysocki 2006-11-02 22:07:19 -08:00 • committed by Linus Torvalds
parent 90d5390944
commit b918f6e62c
4 changed files with 60 additions and 11 deletions
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4
include/linux/pm.h
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@ -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;