diff options
Diffstat (limited to 'lib/sys_info.c')
| -rw-r--r-- | lib/sys_info.c | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/lib/sys_info.c b/lib/sys_info.c index 323624093e54..f32a06ec9ed4 100644 --- a/lib/sys_info.c +++ b/lib/sys_info.c @@ -24,6 +24,13 @@ static const char * const si_names[] = { [ilog2(SYS_INFO_BLOCKED_TASKS)] = "blocked_tasks", }; +/* + * Default kernel sys_info mask. + * If a kernel module calls sys_info() with "parameter == 0", then + * this mask will be used. + */ +static unsigned long kernel_si_mask; + /* Expecting string like "xxx_sys_info=tasks,mem,timers,locks,ftrace,..." */ unsigned long sys_info_parse_param(char *str) { @@ -110,9 +117,26 @@ int sysctl_sys_info_handler(const struct ctl_table *ro_table, int write, else return sys_info_read_handler(&table, buffer, lenp, ppos, ro_table->data); } + +static const struct ctl_table sys_info_sysctls[] = { + { + .procname = "kernel_sys_info", + .data = &kernel_si_mask, + .maxlen = sizeof(kernel_si_mask), + .mode = 0644, + .proc_handler = sysctl_sys_info_handler, + }, +}; + +static int __init sys_info_sysctl_init(void) +{ + register_sysctl_init("kernel", sys_info_sysctls); + return 0; +} +subsys_initcall(sys_info_sysctl_init); #endif -void sys_info(unsigned long si_mask) +static void __sys_info(unsigned long si_mask) { if (si_mask & SYS_INFO_TASKS) show_state(); @@ -135,3 +159,8 @@ void sys_info(unsigned long si_mask) if (si_mask & SYS_INFO_BLOCKED_TASKS) show_state_filter(TASK_UNINTERRUPTIBLE); } + +void sys_info(unsigned long si_mask) +{ + __sys_info(si_mask ? : kernel_si_mask); +} |