linux-kernel - [PATCH tip/core/rcu 0/4] kfree

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Message-ID: <20200415171924.GA9270@paulmck-ThinkPad-P72>
Date:   Wed, 15 Apr 2020 10:19:24 -0700
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     rcu@...r.kernel.org
Cc:     linux-kernel@...r.kernel.org, kernel-team@...com, mingo@...nel.org,
        jiangshanlai@...il.com, dipankar@...ibm.com,
        akpm@...ux-foundation.org, mathieu.desnoyers@...icios.com,
        josh@...htriplett.org, tglx@...utronix.de, peterz@...radead.org,
        rostedt@...dmis.org, dhowells@...hat.com, edumazet@...gle.com,
        fweisbec@...il.com, oleg@...hat.com, joel@...lfernandes.org
Subject: [PATCH tip/core/rcu 0/4] kfree_rcu() updates for v5.8

Hello!

This series updates kfree_rcu() testing and OOM handling.  It also
provides a rcu_gp_might_be_stalled() function that judges whether or
not RCU is being stalled.

1.	Add ability to increase object allocation size, courtesy
	of Joel Fernandes.

2.	rcu/tree: Add a shrinker to prevent OOM due to kfree_rcu()
	batching, courtesy of Joel Fernandes.

3.	rcu/tree: Count number of batched kfree_rcu() locklessly,
	courtesy of Joel Fernandes.

4.	Add rcu_gp_might_be_stalled() to indicate whether or not there
	is currently a good chance that the current RCU grace period
	is being stalled.

							Thanx, Paul

------------------------------------------------------------------------

 include/linux/rcutiny.h |    1 
 include/linux/rcutree.h |    1 
 kernel/rcu/rcuperf.c    |    5 ++-
 kernel/rcu/tree.c       |   70 +++++++++++++++++++++++++++++++++++++++++++-----
 kernel/rcu/tree_stall.h |   40 ++++++++++++++++++++++++---
 5 files changed, 106 insertions(+), 11 deletions(-)