[PATCH 5/9] powerpc/vmemmap: Add altmap support

Balbir Singh bsingharora at gmail.com
Wed Apr 12 10:24:21 AEST 2017


On Wed, 2017-04-12 at 03:42 +1000, Oliver O'Halloran wrote:
> Adds support to powerpc for the altmap feature of ZONE_DEVICE memory. An
> altmap is a driver provided region that is used to provide the backing
> storage for the struct pages of ZONE_DEVICE memory. In situations where
> large amount of ZONE_DEVICE memory is being added to the system the
> altmap reduces pressure on main system memory by allowing the mm/
> metadata to be stored on the device itself rather in main memory.
> 
> Signed-off-by: Oliver O'Halloran <oohall at gmail.com>
> ---

Reviewed-by: Balbir Singh <bsingharora at gmail.com>


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