Re: [PATCH v2 02/12] mm: remove extra ZONE_DEVICE struct page refcount

On 9/13/21 9:15 AM, Alex Sierra wrote: From: Ralph Campbell ZONE_DEVICE struct pages have an extra reference count that complicates the code for put_page() and several places in the kernel that need to check the reference count to see that a page is not being used (gup, compaction, migration, e

[PATCH v2 02/12] mm: remove extra ZONE_DEVICE struct page refcount

From: Ralph Campbell ZONE_DEVICE struct pages have an extra reference count that complicates the code for put_page() and several places in the kernel that need to check the reference count to see that a page is not being used (gup, compaction, migration, etc.). Clean up the code so the reference