| From | Dan Williams <> | Date | Fri, 21 Apr 2017 21:46:27 -0700 | Subject | Re: [HMM 02/15] mm/put_page: move ZONE_DEVICE page reference decrement v2 |
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On Fri, Apr 21, 2017 at 8:30 PM, Jérôme Glisse <jglisse@redhat.com> wrote: > Move page reference decrement of ZONE_DEVICE from put_page() > to put_zone_device_page() this does not affect non ZONE_DEVICE > page. > > Doing this allow to catch when a ZONE_DEVICE page refcount reach > 1 which means the device is no longer reference by any one (unlike > page from other zone, ZONE_DEVICE page refcount never reach 0). > > This patch is just a preparatory patch for HMM. > > Changes since v1: > - commit message > > Signed-off-by: Jérôme Glisse <jglisse@redhat.com> > Cc: Dan Williams <dan.j.williams@intel.com> > Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Reviewed-by: Dan Williams <dan.j.williams@intel.com>
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