On Thu, Aug 04, 2016 at 12:02:29PM +0800, zhong jiang wrote: > according to the total_mapcount, Different process can map any subpages of > the > transparent hugepages. How it can happen to ?
For anonymous memory it can only happen over copy-on-write via fork() + munmap() or something in one of the processes. Now we have tmpfs/shmem with huge pages in mainline. In this case you can map any subpage directly from file. -- Kirill A. Shutemov
