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| author | chao <chao@eero.com> | 2020-08-30 23:41:17 -0700 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2020-11-19 19:37:16 -0800 |
| commit | dfe564045c653d9e6969ccca57a8a04771d333f7 (patch) | |
| tree | 7131af1630ff2c254d7304dc5f835765f486f379 /kernel/sysctl.c | |
| parent | 29368e09392123800e5e2bf0f3eda91f16972e52 (diff) | |
| download | lwn-dfe564045c653d9e6969ccca57a8a04771d333f7.tar.gz lwn-dfe564045c653d9e6969ccca57a8a04771d333f7.zip | |
rcu: Panic after fixed number of stalls
Some stalls are transient, so that system fully recovers. This commit
therefore allows users to configure the number of stalls that must happen
in order to trigger kernel panic.
Signed-off-by: chao <chao@eero.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'kernel/sysctl.c')
| -rw-r--r-- | kernel/sysctl.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/kernel/sysctl.c b/kernel/sysctl.c index afad085960b8..c9fbdd848138 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -2650,6 +2650,17 @@ static struct ctl_table kern_table[] = { .extra2 = SYSCTL_ONE, }, #endif +#if defined(CONFIG_TREE_RCU) + { + .procname = "max_rcu_stall_to_panic", + .data = &sysctl_max_rcu_stall_to_panic, + .maxlen = sizeof(sysctl_max_rcu_stall_to_panic), + .mode = 0644, + .proc_handler = proc_dointvec_minmax, + .extra1 = SYSCTL_ONE, + .extra2 = SYSCTL_INT_MAX, + }, +#endif #ifdef CONFIG_STACKLEAK_RUNTIME_DISABLE { .procname = "stack_erasing", |