From: Zqiang <qiang.zhang1211@gmail.com>
To: pmladek@suse.com
Cc: akpm@linux-foundation.org, frederic@kernel.org,
linux-kernel@vger.kernel.org, Zqiang <qiang.zhang1211@gmail.com>
Subject: [PATCH V2] watchdog: ignore nohz_full cores in new cpumask
Date: Tue, 16 Nov 2021 14:15:36 +0800 [thread overview]
Message-ID: <20211116061536.16293-1-qiang.zhang1211@gmail.com> (raw)
If the nohz_full is enabled, when update watchdog_mask, the
nohz_full cores should be ignored.
Signed-off-by: Zqiang <qiang.zhang1211@gmail.com>
---
v1->v2:
if watchdog_cpumask became empty, set housekeeping_cpumask.
kernel/watchdog.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/kernel/watchdog.c b/kernel/watchdog.c
index ad912511a0c0..6f0c5528b399 100644
--- a/kernel/watchdog.c
+++ b/kernel/watchdog.c
@@ -628,7 +628,9 @@ void lockup_detector_soft_poweroff(void)
static void proc_watchdog_update(void)
{
/* Remove impossible cpus to keep sysctl output clean. */
- cpumask_and(&watchdog_cpumask, &watchdog_cpumask, cpu_possible_mask);
+ cpumask_and(&watchdog_cpumask, &watchdog_cpumask, housekeeping_cpumask(HK_FLAG_TIMER));
+ if (cpumask_empty(&watchdog_cpumask))
+ cpumask_copy(&watchdog_cpumask, housekeeping_cpumask(HK_FLAG_TIMER));
lockup_detector_reconfigure();
}
--
2.17.1
next reply other threads:[~2021-11-16 6:15 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-16 6:15 Zqiang [this message]
2021-11-17 17:03 ` Frederic Weisbecker
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