Messages in this thread | | | From | Logan Gunthorpe <> | Date | Thu, 27 Apr 2017 10:33:37 -0600 | Subject | Re: [PATCH] mm, zone_device: replace {get, put}_zone_device_page() with a single reference |
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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
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