Difference between revisions of "Debugging by printing"

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m (added some structure)
Line 12: Line 12:
 
* dynamic debug, pr_debug and dev_dbg
 
* dynamic debug, pr_debug and dev_dbg
 
* pr_warn and family - see printk.h for details
 
* pr_warn and family - see printk.h for details
 +
* early_printk
 +
* printascii, printch and printhex (on ARM only?)
  
 
* Examples - maybe use example module.
 
* Examples - maybe use example module.

Revision as of 21:15, 14 June 2011


Note: This article is currently only a draft and is a part of a series of articles I'm going to publish the next few months - if you want to contribute to it, please feel free to. However it would be nice if you could coordinate your efforts with me



What this article will be about - ideas

  • printk format
  • Debug/log levels - dmesg -n /proc/sys/kernel/printk
  • printk_ratelimited
  • dynamic debug, pr_debug and dev_dbg
  • pr_warn and family - see printk.h for details
  • early_printk
  • printascii, printch and printhex (on ARM only?)
  • Examples - maybe use example module.


References

  • Linux Kernel Development 3rd Edition
  • Essential Device Drivers


External links