4.4-stable review patch. If anyone has any objections, please let me know.
------------------ From: David Rientjes <rient...@google.com> commit 460bcec84e11c75122ace5976214abbc596eb91b upstream. We got need_resched() warnings in swap_cgroup_swapoff() because swap_cgroup_ctrl[type].length is particularly large. Reschedule when needed. Link: http://lkml.kernel.org/r/alpine.deb.2.10.1704061315270.80...@chino.kir.corp.google.com Signed-off-by: David Rientjes <rient...@google.com> Acked-by: Michal Hocko <mho...@suse.com> Cc: Johannes Weiner <han...@cmpxchg.org> Cc: Vladimir Davydov <vdavydov....@gmail.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hir...@jp.fujitsu.com> Signed-off-by: Andrew Morton <a...@linux-foundation.org> Signed-off-by: Linus Torvalds <torva...@linux-foundation.org> Cc: Ben Hutchings <ben.hutchi...@codethink.co.uk> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- mm/swap_cgroup.c | 2 ++ 1 file changed, 2 insertions(+) --- a/mm/swap_cgroup.c +++ b/mm/swap_cgroup.c @@ -205,6 +205,8 @@ void swap_cgroup_swapoff(int type) struct page *page = map[i]; if (page) __free_page(page); + if (!(i % SWAP_CLUSTER_MAX)) + cond_resched(); } vfree(map); }
