From: paulmck@kernel.org
To: rcu@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, kernel-team@fb.com,
mingo@kernel.org, jiangshanlai@gmail.com,
akpm@linux-foundation.org, mathieu.desnoyers@efficios.com,
josh@joshtriplett.org, tglx@linutronix.de, peterz@infradead.org,
rostedt@goodmis.org, dhowells@redhat.com, edumazet@google.com,
fweisbec@gmail.com, oleg@redhat.com, joel@joelfernandes.org,
"Paul E. McKenney" <paulmck@kernel.org>
Subject: [PATCH tip/core/rcu 2/6] kvfree_rcu: Use __GFP_NOMEMALLOC for single-argument kvfree_rcu()
Date: Wed, 3 Mar 2021 16:11:30 -0800 [thread overview]
Message-ID: <20210304001134.22977-2-paulmck@kernel.org> (raw)
In-Reply-To: <20210304001044.GA22871@paulmck-ThinkPad-P72>
From: "Paul E. McKenney" <paulmck@kernel.org>
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 <mhocko@suse.com>
Suggested-by: Michal Hocko <mhocko@suse.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
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);
}
--
2.9.5
next prev parent reply other threads:[~2021-03-04 0:17 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-04 0:10 [PATCH tip/core/rcu 0/6] kvfree_rcu() updates for v5.12-rc1 Paul E. McKenney
2021-03-04 0:11 ` [PATCH tip/core/rcu 1/6] kvfree_rcu: Directly allocate page for single-argument case paulmck
2021-03-04 0:11 ` paulmck [this message]
2021-03-04 0:11 ` [PATCH tip/core/rcu 3/6] kvfree_rcu: Make krc_this_cpu_unlock() use raw_spin_unlock_irqrestore() paulmck
2021-03-04 0:11 ` [PATCH tip/core/rcu 4/6] kvfree_rcu: Replace __GFP_RETRY_MAYFAIL by __GFP_NORETRY paulmck
2021-03-04 0:11 ` [PATCH tip/core/rcu 5/6] kvfree_rcu: Use same set of GFP flags as does single-argument paulmck
2021-03-04 0:11 ` [PATCH tip/core/rcu 6/6] rcuscale: Add kfree_rcu() single-argument scale test paulmck
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