On Thu, Jun 13, 2019 at 10:57:47AM -0700, Song Liu wrote: > After all uprobes are removed from the huge page (with PTE pgtable), it > is possible to collapse the pmd and benefit from THP again. This patch > does the collapse. > > An issue on earlier version was discovered by kbuild test robot. > > Reported-by: kbuild test robot <lkp@xxxxxxxxx> > Signed-off-by: Song Liu <songliubraving@xxxxxx> > --- > include/linux/huge_mm.h | 7 +++++ > kernel/events/uprobes.c | 5 ++- > mm/huge_memory.c | 69 +++++++++++++++++++++++++++++++++++++++++ I still sync it's duplication of khugepaged functinallity. We need to fix khugepaged to handle SCAN_PAGE_COMPOUND and probably refactor the code to be able to call for collapse of particular range if we have all locks taken (as we do in uprobe case). -- Kirill A. Shutemov
