RE: [PATCH, RFC 1/2] Add config option to enable FS/DAX PMD sharing

[Elliott, Robert (Servers)]

> -----Original Message-----
> From: Linux-nvdimm <linux-nvdimm-bounces@xxxxxxxxxxxx> On Behalf Of
> Larry Bassel
> Sent: Thursday, May 09, 2019 11:06 AM
> Subject: [PATCH, RFC 1/2] Add config option to enable FS/DAX PMD
> sharing
> 
> If enabled, sharing of FS/DAX PMDs will be attempted.
> 
...
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
...
> 
> +config MAY_SHARE_FSDAX_PMD
> +	def_bool y
> +

Is a config option really necessary - is there any reason to
not choose to do this?