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[PATCH] pm_trace is dangerous

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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: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Andrew Morton 2006-06-27 02:53:26 -07:00 committed by Linus Torvalds
parent b762450e84
commit 5c31f2738a
1 changed files with 11 additions and 2 deletions
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13
kernel/power/Kconfig
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@ -38,13 +38,22 @@ config PM_DEBUG
config PM_TRACE config PM_TRACE
bool "Suspend/resume event tracing" bool "Suspend/resume event tracing"
depends on PM && PM_DEBUG && X86_32 depends on PM && PM_DEBUG && X86_32 && EXPERIMENTAL
default y default n
---help--- ---help---
This enables some cheesy code to save the last PM event point in the 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 RTC across reboots, so that you can debug a machine that just hangs
during suspend (or more commonly, during resume). 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 config SOFTWARE_SUSPEND
bool "Software Suspend" bool "Software Suspend"
depends on PM && SWAP && (X86 && (!SMP || SUSPEND_SMP)) || ((FRV || PPC32) && !SMP) depends on PM && SWAP && (X86 && (!SMP || SUSPEND_SMP)) || ((FRV || PPC32) && !SMP)