Re: [PATCH v5 2/4] mm: Provide kernel parameter to allow disabling page init poisoning

[Dave Hansen]

On 09/25/2018 01:20 PM, Alexander Duyck wrote:
> +	vm_debug[=options]	[KNL] Available with CONFIG_DEBUG_VM=y.
> +			May slow down system boot speed, especially when
> +			enabled on systems with a large amount of memory.
> +			All options are enabled by default, and this
> +			interface is meant to allow for selectively
> +			enabling or disabling specific virtual memory
> +			debugging features.
> +
> +			Available options are:
> +			  P	Enable page structure init time poisoning
> +			  -	Disable all of the above options

Can we have vm_debug=off for turning things off, please?  That seems to
be pretty standard.

Also, we need to document the defaults.  I think the default is "all
debug options are enabled", but it would be nice to document that.