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Merge "kernel: rcu: Panic on RCU stall"

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qctecmdr 2019-07-31 18:17:41 -07:00 • committed by Gerrit - the friendly Code Review server
commit 8e9118fc64
2 changed files with 12 additions and 1 deletions
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11
kernel/rcu/Kconfig.debug
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@ -57,6 +57,17 @@ config RCU_CPU_STALL_TIMEOUT
RCU grace period persists, additional CPU stall warnings are
printed at more widely spaced intervals.
config RCU_PANIC_ON_STALL
int "Panic on RCU Stalls"
range 0 1
default 0
depends on RCU_STALL_COMMON
help
Panic if a given RCU grace period extends more than the specified
number of seconds instead of just printing a CPU stall warning.
This helps to collect cpu context as part of ramdumps for post
mortem analysis.
config RCU_TRACE
bool "Enable tracing for RCU"
depends on DEBUG_KERNEL

2
kernel/rcu/tree_stall.h
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@ -12,7 +12,7 @@
// Controlling CPU stall warnings, including delay calculation.
/* panic() on RCU Stall sysctl. */
int sysctl_panic_on_rcu_stall __read_mostly;
int sysctl_panic_on_rcu_stall __read_mostly = CONFIG_RCU_PANIC_ON_STALL;
#ifdef CONFIG_PROVE_RCU
#define RCU_STALL_DELAY_DELTA (5 * HZ)