hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

softlockup: fix false positives on CONFIG_NOHZ 

David Miller reported soft lockup false-positives that trigger
on NOHZ due to CPUs idling for more than 10 seconds.

The solution is touch the softlockup watchdog when we return from
idle. (by definition we are not 'locked up' when we were idle)

 http://bugzilla.kernel.org/show_bug.cgi?id=9409

Reported-by: David Miller <davem@davemloft.net>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Thomas Gleixner 2007-11-28 15:52:56 +01:00 committed by Ingo Molnar
parent a531a14108
commit d393820446
1 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
kernel/time/tick-sched.c
View File

@ -133,6 +133,8 @@ void tick_nohz_update_jiffies(void)
if (!ts->tick_stopped) if (!ts->tick_stopped)
return; return;
touch_softlockup_watchdog();
cpu_clear(cpu, nohz_cpu_mask); cpu_clear(cpu, nohz_cpu_mask);
now = ktime_get(); now = ktime_get();