From b01b405092b7940bd366053a27ed54a87c84e96a Mon Sep 17 00:00:00 2001 From: "Paul E. McKenney" Date: Wed, 20 Jan 2021 17:21:47 +0100 Subject: [PATCH] kvfree_rcu: Use __GFP_NOMEMALLOC for single-argument kvfree_rcu() This commit applies the __GFP_NOMEMALLOC gfp flag to memory allocations carried out by the single-argument variant of kvfree_rcu(), thus avoiding this can-sleep code path from dipping into the emergency reserves. Acked-by: Michal Hocko Suggested-by: Michal Hocko Signed-off-by: Paul E. McKenney --- kernel/rcu/tree.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/rcu/tree.c b/kernel/rcu/tree.c index 1f8c980..08b5044 100644 --- a/kernel/rcu/tree.c +++ b/kernel/rcu/tree.c @@ -3519,7 +3519,7 @@ add_ptr_to_bulk_krc_lock(struct kfree_rcu_cpu **krcp, if (!bnode && can_alloc) { krc_this_cpu_unlock(*krcp, *flags); bnode = (struct kvfree_rcu_bulk_data *) - __get_free_page(GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_NOWARN); + __get_free_page(GFP_KERNEL | __GFP_RETRY_MAYFAIL | __GFP_NOMEMALLOC | __GFP_NOWARN); *krcp = krc_this_cpu_lock(flags); } -- 2.7.4