[Ksummit-discuss] Self nomination
Dave Jones
davej at codemonkey.org.uk
Fri Jul 31 18:17:58 UTC 2015
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.
Dave
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