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SubjectRe: [patch V4 2/8] mm/highmem: Provide CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP
On Wed, Nov 18, 2020 at 01:13:57PM -0800, Linus Torvalds wrote:
> On Wed, Nov 18, 2020 at 12:58 PM Thomas Gleixner <tglx@linutronix.de> wrote:
> >
> > Provide CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP which forces the temporary
> > mapping even for lowmem pages. This needs to be a seperate config switch
> > because this only works on architectures which do not have cache aliasing
> > problems.
>
> Very good. And you made sure to have a comment to not enable it for
> production systems.
>
> Hopefully people will even read it ;)
>

And not start thinking it as a security hardening option.

--
Mel Gorman
SUSE Labs

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