Rawhide kernel options not enabled?

Josh Boyer jwboyer at gmail.com
Tue Feb 3 12:29:24 UTC 2009


On Mon, Feb 02, 2009 at 08:20:34PM -0500, Steven Rostedt wrote:
>
>
>On Mon, 2 Feb 2009, Steven Rostedt wrote:
>> 
>> Do not put down that debugging ability just yet. Would it not be nice to 
>> just tell a user to run a script you send him (the script would do all 
>> the command line commands) and then the user could send you back the 
>> result. The user would not need to reboot or compile another kernel. You 
>> would be able to turn on or off anything function trace you would like.
>
>Also note, if your user has access to serial consoles, and many enterprise 
>users do, then you could also trace an oops. By setting 

Because many enterprise users are using Fedora...

;)

>"ftrace_dump_on_oops" in the kernel command line, and have them enable 
>function tracing before they do whatever they do to cause the oops. The 
>ftrace dump output will dump to the console. If they have serial, then it 
>will dump to their serial console where they can record the crash. This 
>information can be very handy for us to analyze and find the cause on an 
>oops.

Sounds neat.  Sadly, lots of common hardware these days lacks serial ports.
Will it do the same to a monitor if those options are enabled?

josh




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