Re: [PATCH] detect problematic kernel configs

Gilles Chanteperdrix wrote:
> Jan Kiszka wrote:
>  > Hi,
>  > 
>  > this patch tries to reduce the traps newbies may tap by leaving (for us)
>  > well-known problematic kernel switches on. And are there any futher I
>  > forgot, e.g. on other archs?
>  > 
>  > Jan
>  > Index: ksrc/arch/i386/Kconfig
>  > ===================================================================
>  > --- ksrc/arch/i386/Kconfig (revision 924)
>  > +++ ksrc/arch/i386/Kconfig (working copy)
>  > @@ -194,3 +194,19 @@ depends on XENO_OPT_NUCLEUS
>  >  source "drivers/xenomai/Kconfig"
>  >  
>  >  endmenu
>  > +
>  > +if XENOMAI = y
>  > +
>  > +comment "WARNING: Potential latency killers detected!"
>  > +        depends on PM || ACPI || CPU_FREQ
>  > +
>  > +comment "Power Management (PM)"
>  > +        depends on PM
>  > +
>  > +comment "ACPI"
>  > +        depends on ACPI
> 
> Only ACPI_PROCESSOR is a latency killer.
> 

Good point. Are there also some more fine-grained switches under
CONFIG_PM? Never tried this in details, always picked the safe way.

Jan

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