[PATCH v5 0/2] nohz/watchdog/smp_hotplug_thread changes

cmetcalf
2015-04-06T19:46:13Z

From: Chris Metcalf <cmetcalf@ezchip.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(-)

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2.1.2