[Ksummit-discuss] Self nomination

Greg KH greg at kroah.com
Fri Jul 31 18:22:56 UTC 2015


On Fri, Jul 31, 2015 at 02:17:58PM -0400, Dave Jones wrote:
> On Fri, Jul 31, 2015 at 11:12:45AM -0700, Greg Kroah-Hartman wrote:
>  > On Fri, Jul 31, 2015 at 12:51:53PM -0500, Bjorn Helgaas wrote:
>  > > I prefer that a dmesg collected in the simplest possible way, with no
>  > > special config or boot flags, be as useful as possible.  So converting
>  > > to dynamic debug requires much more thought about which messages
>  > > should be always printed and which should become dynamic.
>  > 
>  > Why would a debugging message ever not be dynamic?  They are there for
>  > you to use, and turn off when you are done.  If you want a user to
>  > report the output of them, then of course they should be dynamic so they
>  > can just write a line to a debugfs file and then start seeing them
> 
> This implies a user knows ahead of time what bugs they are going to hit,
> and which messages they need to enable.  For hard-to-reproduce bugs,
> or bugs that exhibit non-obvious symptoms, this isn't workable.

Fair enough, but wouldn't those messages be "errors"?

Anyway, this is way off-topic from the original thread, it all comes
down to specifics of the message that is being written and the
surrounding issues of why it would be written.

thanks,

greg k-h


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