linux kernel - Map memory from alloc_page to the calling process address space -

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i have linux device driver allocates physical memory/pages. have single ioctl, application can call, allocates physical page , maps process memory using vm_insert_pfn.

i have allocated contiguous vma based on total number of pages required application. using alloc_page() allocate physical page.

what want know is, if physical page allocated alloc_page() counted against process making ioctl or if physical page belongs driver after mapping pre-allocated vma. if not how can achieve this?

i using flags gfp_movable|gfp_highuser.


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