Provided by: linux-doc-2.6.15_2.6.15-23.39_all bug

NAME

       unmap_mapping_range - unmap the portion of all mmaps

SYNOPSIS

       void unmap_mapping_range  (struct address_space * mapping,
                                   loff_t const holebegin,
                                   loff_t const holelen, int even_cows);

ARGUMENTS

       mapping
              the address space containing mmaps to be unmapped.

       holebegin
              byte  in  first  page  to  unmap,  relative  to the start of the
              underlying file. This  will  be  rounded  down  to  a  PAGE_SIZE
              boundary.  Note  that  this  is different from vmtruncate, which
              must keep the partial page. In contrast,  we  must  get  rid  of
              partial pages.

       holelen
              size  of prospective hole in bytes. This will be rounded up to a
              PAGE_SIZE boundary. A holelen of zero truncates to  the  end  of
              the file.

       even_cows
              1  when truncating a file, unmap even private COWed pages; but 0
              when invalidating pagecache, don’t throw away private data.

DESCRIPTION

       in the specified address_space  corresponding  to  the  specified  page
       range in the underlying file.