vm_insert_page man page on Scientific

vm_insert_page man page on Scientific

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VM_INSERT_PAGE(9)	  Memory Management in Linux	     VM_INSERT_PAGE(9)

NAME
       vm_insert_page - insert single page into user vma

SYNOPSIS
       int vm_insert_page(struct vm_area_struct * vma, unsigned long addr,
			  struct page * page);

ARGUMENTS
       vma
	   user vma to map to

       addr
	   target user address of this page

       page
	   source kernel page

DESCRIPTION
       This allows drivers to insert individual pages they´ve allocated into a
       user vma.

       The page has to be a nice clean _individual_ kernel allocation. If you
       allocate a compound page, you need to have marked it as such
       (__GFP_COMP), or manually just split the page up yourself (see
       split_page).

       NOTE! Traditionally this was done with “remap_pfn_range” which took an
       arbitrary page protection parameter. This doesn´t allow that. Your vma
       protection will have to be set up correctly, which means that if you
       want a shared writable mapping, you´d better ask for a shared writable
       mapping!

       The page does not need to be reserved.

COPYRIGHT
Kernel Hackers Manual 2.6.	 November 2013		     VM_INSERT_PAGE(9)

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