The patch titled
Subject: watchdog: simplify housekeeping affinity with the appropriate mask
has been added to the -mm tree. Its filename is
watchdog-simplify-housekeeping-affinity-with-the-appropriate-mask.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/watchdog-simplify-housekeeping-affinity-with-the-appropriate-mask.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/watchdog-simplify-housekeeping-affinity-with-the-appropriate-mask.patch
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------------------------------------------------------
From: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Subject: watchdog: simplify housekeeping affinity with the appropriate mask
housekeeping_mask gathers all the CPUs that aren't part of the nohz_full
set. This is exactly what we want the watchdog to be affine to without
the need to use complicated cpumask operations.
Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
Reviewed-by: Chris Metcalf <cmetcalf@xxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Chris Metcalf <cmetcalf@xxxxxxxxxx>
Cc: Don Zickus <dzickus@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Ulrich Obergfell <uobergfe@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/watchdog.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff -puN kernel/watchdog.c~watchdog-simplify-housekeeping-affinity-with-the-appropriate-mask kernel/watchdog.c
--- a/kernel/watchdog.c~watchdog-simplify-housekeeping-affinity-with-the-appropriate-mask
+++ a/kernel/watchdog.c
@@ -929,10 +929,8 @@ void __init lockup_detector_init(void)
#ifdef CONFIG_NO_HZ_FULL
if (tick_nohz_full_enabled()) {
- if (!cpumask_empty(tick_nohz_full_mask))
- pr_info("Disabling watchdog on nohz_full cores by default\n");
- cpumask_andnot(&watchdog_cpumask, cpu_possible_mask,
- tick_nohz_full_mask);
+ pr_info("Disabling watchdog on nohz_full cores by default\n");
+ cpumask_copy(&watchdog_cpumask, housekeeping_mask);
} else
cpumask_copy(&watchdog_cpumask, cpu_possible_mask);
#else
_
Patches currently in -mm which might be from fweisbec@xxxxxxxxx are
smpboot-fix-memory-leak-on-error-handling.patch
smpboot-make-cleanup-to-mirror-setup.patch
smpboot-allow-to-pass-the-cpumask-on-per-cpu-thread-registration.patch
watchdog-simplify-housekeeping-affinity-with-the-appropriate-mask.patch
linux-next.patch
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