On Fri, Apr 04, 2025 at 09:16:10PM +0200, David Hildenbrand wrote: > On 04.04.25 16:06, Pankaj Raghav (Samsung) wrote: > > From: Pankaj Raghav <p.raghav@xxxxxxxxxxx> > > > > THP support for non-tmpfs filesystem has been around for some time now. > > Update the admin guide to reflect it. > > > > While we are at it, move FilePmdMapped to previous paragraph for clarity, > > and clarify ShmemPmdMapped & ShmemHugePage. > > > > Signed-off-by: Pankaj Raghav <p.raghav@xxxxxxxxxxx> > > Acked-by: David Hildenbrand <david@xxxxxxxxxx> > > --- > > BTW, we should go over the whole document and bring it up to date. > Interestingly, it starts with > > "Performance critical computing applications dealing with large memory > working sets are already running on top of libhugetlbfs and in turn > hugetlbfs. Transparent HugePage Support (THP) is an alternative mean of > using huge pages for the backing of virtual memory with huge pages > that supports the automatic promotion and demotion of page sizes and > without the shortcomings of hugetlbfs. > > Currently THP only works for anonymous memory mappings and tmpfs/shmem. > But in the future it can expand to other filesystems." As a part of this patch, I do change 2nd paragraph: -Currently THP only works for anonymous memory mappings and tmpfs/shmem. -But in the future it can expand to other filesystems. +Currently, THP only works for anonymous memory mappings, tmpfs/shmem and +filesystems that support large folios. Do we need to add more changes to the first paragraph as well? -- Pankaj
