Re: [PATCH][v2] PM / sleep: Add pm_debug_messages boot command control

[Pavel Machek]

On Sun 2020-03-29 22:46:40, Chen Yu wrote:
> Debug messages from the system suspend/hibernation infrastructure
> is disabled by default, and can only be enabled after the system
> has boot up via /sys/power/pm_debug_messages. This makes the hibernation
> resume hard to track as it involves system boot up across hibernation.
> There's no chance for software_resume() to track the resume process,
> eg.
> 
> Turning on the pm_debug_messages during boot up by appending
> 'pm_debug_message'.
> 
> Cc: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>
> Cc: Len Brown <lenb@xxxxxxxxxx>
> Cc: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
> Signed-off-by: Chen Yu <yu.c.chen@xxxxxxxxx>
> ---
> v2: According to Randy's suggestion, add the command line
>     option to Documentation/admin-guide/kernel-parameters.txt
> ---
>  Documentation/admin-guide/kernel-parameters.txt | 3 +++
>  kernel/power/main.c                             | 7 +++++++
>  2 files changed, 10 insertions(+)
> 
> diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
> index c07815d230bc..105ec73743d7 100644
> --- a/Documentation/admin-guide/kernel-parameters.txt
> +++ b/Documentation/admin-guide/kernel-parameters.txt
> @@ -3698,6 +3698,9 @@
>  			Override pmtimer IOPort with a hex value.
>  			e.g. pmtmr=0x508
>  
> +	pm_debug_message	[SUSPEND,KNL]
> +			Enable suspend/resume debug messages during boot up.
> +
>  	pnp.debug=1	[PNP]
>  			Enable PNP debug messages (depends on the
>  			CONFIG_PNP_DEBUG_MESSAGES option).  Change at

See?

So this should be pm.debug=1 for consistency?

									Pavel
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