On April 05, 2017 3:47 PM Vlastimil Babka wrote: > > The previous patch has shown that simply setting and clearing PF_MEMALLOC in > current->flags can result in wrongly clearing a pre-existing PF_MEMALLOC flag > and potentially lead to recursive reclaim. Let's introduce helpers that > support > proper nesting by saving the previous stat of the flag, similar to the > existing > memalloc_noio_* and memalloc_nofs_* helpers. Convert existing setting/clearing > of PF_MEMALLOC within mm to the new helpers. > > There are no known issues with the converted code, but the change makes it > more > robust. > > Suggested-by: Michal Hocko <mho...@suse.com> > Signed-off-by: Vlastimil Babka <vba...@suse.cz> > ---
Acked-by: Hillf Danton <hillf...@alibaba-inc.com>
