[ofa-general] Re: [PATCH 10/14] infiniband: use printk_once

Roland Dreier rdreier at cisco.com
Mon Aug 10 10:42:18 PDT 2009


 > I'm a bit nervous about this one.  
 > printk_once will print once ONLY if CONFIG_PRINTK is set in include/linux/autoconf.h
 > (i.e., when the kernel is configured).  Otherwise, it gets defined to printk --
 > and it will always print in this case.
 > (see 2.6.30.xx kernel include file "include/linux/kernel.h", lines 235, 249, and 272).

Umm... if CONFIG_PRINTK is turned off nothing prints, right?

 > Do you think that distributions will ALWAYS have CONFIG_PRINTK defined?

Yes, I suspect they do want to get kernel messages.

 - R.



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