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

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Message-ID: <20200831181356.GA1224@paulmck-ThinkPad-P72>
Date:   Mon, 31 Aug 2020 11:13:56 -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] Add smp_call_function() debugging for v5.10

Hello!

This series adds debugging code for stalled smp_call_function() handlers:

1.	Add backtrace_idle parameter to force backtrace of idle CPUs.

2.	Add source and destination CPUs to __call_single_data.

3.	kernel/smp: Provide CSD lock timeout diagnostics.

4.	Make symbol 'csd_bug_count' static.

						Thanx, Paul

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

 Documentation/admin-guide/kernel-parameters.txt |    4 
 include/linux/smp.h                             |    3 
 include/linux/smp_types.h                       |    3 
 kernel/smp.c                                    |  136 +++++++++++++++++++++++-
 lib/Kconfig.debug                               |   11 +
 lib/nmi_backtrace.c                             |    6 -
 6 files changed, 161 insertions(+), 2 deletions(-)