On 06/24/22 17:36, James Houghton wrote: > This allows fork() to work with high-granularity mappings. The page > table structure is copied such that partially mapped regions will remain > partially mapped in the same way for the new process. > > Signed-off-by: James Houghton <jthoughton@xxxxxxxxxx> > --- > mm/hugetlb.c | 74 +++++++++++++++++++++++++++++++++++++++++----------- > 1 file changed, 59 insertions(+), 15 deletions(-) FYI - With https://lore.kernel.org/linux-mm/20220621235620.291305-5-mike.kravetz@xxxxxxxxxx/ copy_hugetlb_page_range() should never be called for shared mappings. Since HGM only works on shared mappings, code in this patch will never be executed. I have a TODO to remove shared mapping support from copy_hugetlb_page_range. -- Mike Kravetz
