On 04/09/2015 04:59 PM, Andrew Morton wrote: > On Thu, 9 Apr 2015 08:50:25 +0900 Minchan Kim <minchan@xxxxxxxxxx> wrote: > >> Bump. > > I'm getting the feeling that MADV_FREE is out of control. > > Below is the overall rollup of > > mm-support-madvisemadv_free.patch > mm-support-madvisemadv_free-fix.patch > mm-support-madvisemadv_free-fix-2.patch > mm-dont-split-thp-page-when-syscall-is-called.patch > mm-dont-split-thp-page-when-syscall-is-called-fix.patch > mm-dont-split-thp-page-when-syscall-is-called-fix-2.patch > mm-free-swp_entry-in-madvise_free.patch > mm-move-lazy-free-pages-to-inactive-list.patch > mm-move-lazy-free-pages-to-inactive-list-fix.patch > mm-move-lazy-free-pages-to-inactive-list-fix-fix.patch > mm-move-lazy-free-pages-to-inactive-list-fix-fix-fix.patch > mm-make-every-pte-dirty-on-do_swap_page.patch > > > It's pretty large and has its sticky little paws in all sorts of places. > > > The feature would need to be pretty darn useful to justify a mainline > merge. Has any such usefulness been demonstrated? The performance increase of MADV_FREE over MADV_DONTNEED is quite significant. I suspect this is especially important for mobile devices, which are more memory starved than desktop systems and servers. -- All rights reversed -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>