On Sat, Apr 02, 2016 at 06:37:44PM +0300, Konstantin Khlebnikov wrote: > Khugepaged detects own VMAs by checking vm_file and vm_ops but this > way it cannot distinguish private /dev/zero mappings from other special > mappings like /dev/hpet which has no vm_ops and popultes PTEs in mmap. > > This fixes false-positive VM_BUG_ON and prevents installing THP where > they are not expected. > > Signed-off-by: Konstantin Khlebnikov <[email protected]> > Reported-by: Dmitry Vyukov <[email protected]> > Link: > http://lkml.kernel.org/r/cact4y+zmuzmv5cjsfoexviwqdabagt7t+stkftqan9ydtge...@mail.gmail.com > Fixes: 78f11a255749 ("mm: thp: fix /dev/zero MAP_PRIVATE and vm_flags > cleanups") > Cc: stable <[email protected]>
Looks good to me. Acked-by: Kirill A. Shutemov <[email protected]> -- Kirill A. Shutemov
