• Heiko Carstens's avatar
    s390/mm: optimize copy_page · dba6bb60
    Heiko Carstens authored
    Always use the mvcl instruction to copy a page instead of mvpg or a
    couple of mvc instructions.
    Copying a huge page is 25% faster this way. Also bypass caches when
    copying pages since only parts of a page will be used afterwards.
    Especially when copying a huge page this would kick everything out
    of the L1 and L2 data caches on a zEC12 machine.
    Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
    dba6bb60
page.h 4.55 KB