diff options
| -rw-r--r-- | Documentation/admin-guide/kernel-parameters.txt | 15 | ||||
| -rw-r--r-- | kernel/panic.c | 9 |
2 files changed, 24 insertions, 0 deletions
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 3780b7e6bfd5..55a887d6309c 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -4563,6 +4563,21 @@ Use this option carefully, maybe worth to setup a bigger log buffer with "log_buf_len" along with this. + panic_sys_info= A comma separated list of extra information to be dumped + on panic. + Format: val[,val...] + Where @val can be any of the following: + + tasks: print all tasks info + mem: print system memory info + timers: print timers info + locks: print locks info if CONFIG_LOCKDEP is on + ftrace: print ftrace buffer + all_bt: print all CPUs backtrace (if available in the arch) + blocked_tasks: print only tasks in uninterruptible (blocked) state + + This is a human readable alternative to the 'panic_print' option. + parkbd.port= [HW] Parallel port number the keyboard adapter is connected to, default is 0. Format: <parport#> diff --git a/kernel/panic.c b/kernel/panic.c index d7aa427dc23c..d9d4fcd5e318 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -143,6 +143,15 @@ static __init int kernel_panic_sysctls_init(void) late_initcall(kernel_panic_sysctls_init); #endif +/* The format is "panic_sys_info=tasks,mem,locks,ftrace,..." */ +static int __init setup_panic_sys_info(char *buf) +{ + /* There is no risk of race in kernel boot phase */ + panic_print = sys_info_parse_param(buf); + return 1; +} +__setup("panic_sys_info=", setup_panic_sys_info); + static atomic_t warn_count = ATOMIC_INIT(0); #ifdef CONFIG_SYSFS |