linux-kernel - [PATCH smp 0/2] Provide CSD lock timeout diagnostics

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Message-ID: <20200709235436.GA20922@paulmck-ThinkPad-P72>
Date:   Thu, 9 Jul 2020 16:54:36 -0700
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     peterz@...radead.org, mingo@...nel.org, tglx@...utronix.de,
        bigeasy@...utronix.de, frederic@...nel.org
Subject: [PATCH smp 0/2] Provide CSD lock timeout diagnostics

Hello!

This is a sneak preview of a series providing diagnostics to help track
down problems that would result in excessive csd_unlock() latencies:

1.	Add source and destination CPUs to __call_single_data.
	I freely admit that I found the union declaration a
	bit confusing!

2.	Provide CSD lock timeout diagnostics.

						Thanx, Paul

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

 include/linux/smp.h       |    3 +
 include/linux/smp_types.h |    3 +
 kernel/smp.c              |  135 +++++++++++++++++++++++++++++++++++++++++++++-
 lib/Kconfig.debug         |   10 +++
 4 files changed, 150 insertions(+), 1 deletion(-)