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SubjectRe: [REGRESSION] in 3.18-rc1: ppp crashes kernel
Am 07.11.2014 um 12:56 schrieb Stefan Seyfried:
> Hi Paul,
>
> Am 07.11.2014 um 12:53 schrieb Paul Bolle:
>> Wild guess: is CONFIG_RCU_NOCB_CPU perhaps set in your
>> v3.18-rc3 .config?
>
> Yes it is:
> tux@linux:~> zgrep CONFIG_RCU_NOCB_CPU /proc/config.gz
> CONFIG_RCU_NOCB_CPU=y
> # CONFIG_RCU_NOCB_CPU_NONE is not set
> # CONFIG_RCU_NOCB_CPU_ZERO is not set
> CONFIG_RCU_NOCB_CPU_ALL=y
>
> And I'll try without it, but looking at the backtrace and the actual
> BUG_ON() in the code, I cannot really believe it is the real problems.
>
> But I'll try with the config changed and with the above line removed.

JFTR, this did not help:
tux@linux:~/linux> zgrep CONFIG_RCU_NOCB_CPU /proc/config.gz
# CONFIG_RCU_NOCB_CPU is not set

neither did:

--- a/init/main.c
+++ b/init/main.c
@@ -583,7 +583,7 @@ asmlinkage __visible void __init start_kernel(void)
early_irq_init();
init_IRQ();
tick_init();
- rcu_init_nohz();
+// rcu_init_nohz();
init_timers();
hrtimers_init();
softirq_init();
--
Stefan Seyfried
Linux Consultant & Developer -- GPG Key: 0x731B665B
B1 Systems GmbH
Osterfeldstraße 7 / 85088 Vohburg / http://www.b1-systems.de
GF: Ralph Dehner / Unternehmenssitz: Vohburg / AG: Ingolstadt,HRB 3537
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