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 <der.herr@xxxxxxx>
---
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
--
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