How to enable CONFIG_PRINTK_TIME

rajes4india · 07-20-2014, 11:44 PM

Hi Friends,

I am debugging kernel for one of network control issue. i need to enable time stamp on log message.

please share how to enable CONFIG_PRINTK_TIME and CONFIG_DEBUG_KERNEL.

thanks in advance.

thanks
Rajesh kumar V

bathory · 07-21-2014, 03:12 AM

You'll find these options under:

Code:

Symbol: PRINTK_TIME [=n]                                                                                                
  | Type  : boolean                                                                                                          
  | Prompt: Show timing information on printks                                                                                
  |   Location:                                                                                                               
  |     -> Kernel hacking                                                                                                    
  | (1)   -> printk and dmesg options

Code:

 Symbol: DEBUG_KERNEL [=n]                                                                            
  | Type  : boolean                                                                                                       
  | Prompt: Kernel debugging                                                                                            
  |   Location:                                                                                                              
  | (1) -> Kernel hacking

Regards

KernelDev0815 · 09-30-2014, 12:38 AM

Friendly note: please also pay close attention to its Kconfig help text (PRINTK_TIME is a *permanently* enabled i.e. binary build-time option, whereas enabling via kernel boot cmdline parm is fully dynamic i.e. will skip timestamp logging efforts once not specified).