linux-kernel - [PATCH v2 0/2] Some enhancement for kvfree_rcu

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Message-Id: <20240904143938.119964-1-urezki@gmail.com>
Date: Wed,  4 Sep 2024 16:39:36 +0200
From: "Uladzislau Rezki (Sony)" <urezki@...il.com>
To: "Paul E . McKenney" <paulmck@...nel.org>
Cc: RCU <rcu@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Neeraj upadhyay <Neeraj.Upadhyay@....com>,
	Boqun Feng <boqun.feng@...il.com>,
	Joel Fernandes <joel@...lfernandes.org>,
	Frederic Weisbecker <frederic@...nel.org>,
	Vlastimil Babka <vbabka@...e.cz>,
	Uladzislau Rezki <urezki@...il.com>,
	Oleksiy Avramchenko <oleksiy.avramchenko@...y.com>
Subject: [PATCH v2 0/2] Some enhancement for kvfree_rcu_mightsleep()

This is v2. This small change tends to improve even more the slow path
of kvfree_rcu_mightsleep() API. It is hit when a low memory condition
occurs which leads us into two options:
  a) check if a GP is already passed for freed object;
  b) if not, initialize and wait for completion of a new GP.

The differecne between v1 -> v2:
  - Drop "Support dynamic rcu_head for single argument objects" patch;
  - Use cond_synchronize_rcu_full() in a slow path.

Uladzislau Rezki (Sony) (2):
  rcu/kvfree: Use polled API in a slow path
  rcu/kvfree: Switch to expedited version in slow path

 kernel/rcu/tree.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

-- 
2.39.2