On Thu, Oct 29, 2020 at 06:44:46PM +0800, Alex Shi wrote: > Add VM_WARN_ON_ONCE_PAGE() macro. > > Since readahead page is charged on memcg too, in theory we don't have to > check this exception now. Before safely remove them all, add a warning > for the unexpected !memcg. > > Signed-off-by: Alex Shi <alex.shi@xxxxxxxxxxxxxxxxx> > Acked-by: Michal Hocko <mhocko@xxxxxxxx> > Acked-by: Hugh Dickins <hughd@xxxxxxxxxx> > Cc: Johannes Weiner <hannes@xxxxxxxxxxx> > Cc: Michal Hocko <mhocko@xxxxxxxxxx> > Cc: Vladimir Davydov <vdavydov.dev@xxxxxxxxx> > Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> > Cc: cgroups@xxxxxxxxxxxxxxx > Cc: linux-mm@xxxxxxxxx > Cc: linux-kernel@xxxxxxxxxxxxxxx Acked-by: Johannes Weiner <hannes@xxxxxxxxxxx>
