allow preemption in mem_cgroup_move_account_page_stat as the call sites of mem_cgroup_move_account_page_stat are under move_lock_mem_cgroup move_unlock_mem_cgroup (spin_lock_irqsave/ spin_unlock_irqrestore respectively) the move operations preempt_disable/enable seem to be purely for migration protection so a migrate_disable/enable should be fine here.
patch on top of 3.12.10-rt15 Signed-off-by: Nicholas Mc Guire <[email protected]> --- mm/memcontrol.c | 4 ++-- 1 files changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/memcontrol.c b/mm/memcontrol.c index a67e630f..e7cc35a 100644 --- a/mm/memcontrol.c +++ b/mm/memcontrol.c @@ -3784,10 +3784,10 @@ void mem_cgroup_move_account_page_stat(struct mem_cgroup *from, enum mem_cgroup_stat_index idx) { /* Update stat data for mem_cgroup */ - preempt_disable(); + migrate_disable(); __this_cpu_sub(from->stat->count[idx], nr_pages); __this_cpu_add(to->stat->count[idx], nr_pages); - preempt_enable(); + migrate_enable(); } /** -- 1.7.2.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
