linux-kernel - [PATCH tip/core/rcu 0/2] smp_call

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Date:   Thu, 5 Nov 2020 15:00:40 -0800
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, 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 0/2] smp_call_function updates for v5.11

Hello!

This series prevents /proc/cpuinfo from piling up quite so many redundant
IPIs, and also avoids IPIing idle CPUs.

1.	Avoid cpuinfo-induced IPI pileups.

2.	Avoid cpuinfo-induced IPIing of idle CPUs.

						Thanx, Paul

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

 arch/x86/kernel/cpu/aperfmperf.c |   16 +++++++++++++++-
 include/linux/rcutiny.h          |    2 ++
 include/linux/rcutree.h          |    1 +
 kernel/rcu/tree.c                |    8 ++++++++
 4 files changed, 26 insertions(+), 1 deletion(-)