linux-kernel - [PATCH v5 0/2] nohz/watchdog/smp_hotplug

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Message-ID: <1428349556-21873-1-git-send-email-cmetcalf@ezchip.com>
Date:	Mon, 6 Apr 2015 15:45:54 -0400
From:	<cmetcalf@...hip.com>
To:	Thomas Gleixner <tglx@...utronix.de>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Don Zickus <dzickus@...hat.com>,
	Ulrich Obergfell <uobergfe@...hat.com>,
	Ingo Molnar <mingo@...nel.org>,
	Andrew Morton <akpm@...ux-foundation.org>
CC:	Chris Metcalf <cmetcalf@...hip.com>,
	Andrew Jones <drjones@...hat.com>,
	chai wen <chaiw.fnst@...fujitsu.com>,
	Fabian Frederick <fabf@...net.be>,
	Aaron Tomlin <atomlin@...hat.com>,
	Ben Zhang <benzh@...omium.org>,
	Christoph Lameter <cl@...ux.com>,
	Gilad Ben-Yossef <gilad@...yossef.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	<linux-kernel@...r.kernel.org>, Jonathan Corbet <corbet@....net>,
	<linux-doc@...r.kernel.org>, Peter Zijlstra <peterz@...radead.org>
Subject: [PATCH v5 0/2] nohz/watchdog/smp_hotplug_thread changes

From: Chris Metcalf <cmetcalf@...hip.com>

These changes allow the watchdog to work cleanly with nohz_full
by default, and to be configurable if desired to enable the watchdog
on cores that would normally disable it due to being nohz_full.

Thomas, does the addition of an exclude_mask to smp_hotplug_thread
meet with your approval?  It seems like a pretty clean extension
and enables the desired watchdog functionality for nohz_full pretty
nicely, I think.

Uli, this version is based on the linux-next tree, which includes
your recent refactoring changes; I've made all your suggested changes.

Don and/or Uli, do you want to give your Acked-by to the watchdog change?

Frederick, I guess you could push it through your nohz tree?  Or would
it make sense for Andrew to take this into his tree, which looks like
what happened with Uli/Don's earlier watchdog changes?  I'm assuming my
pushing it through the arch/tile tree is probably not the best way to go.

Chris Metcalf (2):
  smpboot: allow excluding cpus from the smpboot threads
  watchdog: add watchdog_exclude sysctl to assist nohz

 Documentation/lockup-watchdogs.txt |  6 ++++++
 Documentation/sysctl/kernel.txt    |  9 +++++++++
 include/linux/nmi.h                |  3 +++
 include/linux/smpboot.h            |  2 ++
 kernel/smpboot.c                   | 11 ++++++++---
 kernel/sysctl.c                    |  7 +++++++
 kernel/watchdog.c                  | 33 +++++++++++++++++++++++++++++++++
 7 files changed, 68 insertions(+), 3 deletions(-)

-- 
2.1.2

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