Re: [PATCH] mm, zone_device: replace {get, put}_zone_device_page() with a single reference

[Logan Gunthorpe]

On 27/04/17 10:14 AM, Dan Williams wrote:
> You're overlooking that the page reference count 1 after
> arch_add_memory(). So at the end of time we're just dropping the
> arch_add_memory() reference to release the page and related
> dev_pagemap.

Thanks, that does actually make a lot more sense to me now. However,
there still appears to be an asymmetry in that the pgmap->ref is
incremented once and decremented once per page...

Logan