Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   "Joel Fernandes (Google)" <joel@joelfernandes.org>
To:     linux-kernel@vger.kernel.org
Cc:     "Joel Fernandes (Google)" <joel@joelfernandes.org>,
        paulmck@kernel.org,
        Rushikesh S Kadam <rushikesh.s.kadam@intel.com>,
        "Uladzislau Rezki (Sony)" <urezki@gmail.com>,
        Neeraj upadhyay <neeraj.iitr10@gmail.com>,
        Frederic Weisbecker <frederic@kernel.org>,
        Steven Rostedt <rostedt@goodmis.org>,
        rcu <rcu@vger.kernel.org>, vineeth@bitbyteword.org
Subject: [PATCH v4 09/14] net/core: Move call_rcu() to call_rcu_lazy()
Date:   Fri, 19 Aug 2022 20:48:52 +0000
Message-Id: <20220819204857.3066329-10-joel@joelfernandes.org>
In-Reply-To: <20220819204857.3066329-1-joel@joelfernandes.org>
References: <20220819204857.3066329-1-joel@joelfernandes.org>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Precedence: bulk

This is required to prevent callbacks triggering RCU machinery too
quickly and too often, which adds more power to the system.

Signed-off-by: Joel Fernandes (Google) <joel@joelfernandes.org>
---
 net/core/dst.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/net/core/dst.c b/net/core/dst.c
index d16c2c9bfebd..68c240a4a0d7 100644
--- a/net/core/dst.c
+++ b/net/core/dst.c
@@ -174,7 +174,7 @@ void dst_release(struct dst_entry *dst)
 			net_warn_ratelimited("%s: dst:%p refcnt:%d\n",
 					     __func__, dst, newrefcnt);
 		if (!newrefcnt)
-			call_rcu(&dst->rcu_head, dst_destroy_rcu);
+			call_rcu_lazy(&dst->rcu_head, dst_destroy_rcu);
 	}
 }
 EXPORT_SYMBOL(dst_release);
-- 
2.37.2.609.g9ff673ca1a-goog