Commit 5c31f273 authored by Andrew Morton's avatar Andrew Morton Committed by Linus Torvalds
Browse files

[PATCH] pm_trace is dangerous 



CONFIG_PM_TRACES scrogs your RTC.  Mark it as experimental, and defaulting to
`off'.

Also beef up the help message a bit.

Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent b762450e

kernel/power/Kconfig

+11 −2
Original line number Diff line number Diff line
@@ -38,13 +38,22 @@ config PM_DEBUG 


config PM_TRACE

	bool "Suspend/resume event tracing"

	depends on PM && PM_DEBUG && X86_32

	default y

	depends on PM && PM_DEBUG && X86_32 && EXPERIMENTAL

	default n

	---help---

	This enables some cheesy code to save the last PM event point in the

	RTC across reboots, so that you can debug a machine that just hangs

	during suspend (or more commonly, during resume).



	To use this debugging feature you should attempt to suspend the machine,

	then reboot it, then run



		dmesg -s 1000000 | grep 'hash matches'



	CAUTION: this option will cause your machine's real-time clock to be

	set to an invalid time after a resume.





config SOFTWARE_SUSPEND

	bool "Software Suspend"

	depends on PM && SWAP && (X86 && (!SMP || SUSPEND_SMP)) || ((FRV || PPC32) && !SMP)