From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Michael Ellerman <mpe@ellerman.id.au>, linuxppc-dev@ozlabs.org
Subject: Re: [PATCH] powerpc/xive: Fix/improve verbose debug output
Date: Fri, 28 Apr 2017 08:48:09 +0200 [thread overview]
Message-ID: <1493362089.25766.300.camel@kernel.crashing.org> (raw)
In-Reply-To: <874lx99h25.fsf@concordia.ellerman.id.au>
On Fri, 2017-04-28 at 16:34 +1000, Michael Ellerman wrote:
> > > If there's non-verbose debug that we think would be useful to
> > > differentiate from verbose then those could be pr_debug() - which means
> > > they'll be jump labelled off in most production kernels, but still able
> > > to be enabled.
> >
> > Maybe... I don't like the giant "debug" switch accross the whole
> > kernel, though.
>
> Not sure what you mean. You can enable pr_debug()s individually, by
> function, by module, by file, or for the whole kernel.
>
> To enable everything in xive you'd do:
>
> # echo 'file *xive* +p' > /sys/kernel/debug/dynamic_debug/control
>
> Or boot with: loglevel=8 dyndbg="file *xive* +p"
Ah that's new goodness I wasn't aware of. Anyway, I can spin that
later, not planning on doing any work today ;-)
Cheers,
Ben.
next prev parent reply other threads:[~2017-04-28 6:48 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-27 13:57 [PATCH] powerpc/xive: Fix/improve verbose debug output Benjamin Herrenschmidt
2017-04-28 3:07 ` Michael Ellerman
2017-04-28 5:20 ` Benjamin Herrenschmidt
2017-04-28 6:34 ` Michael Ellerman
2017-04-28 6:48 ` Benjamin Herrenschmidt [this message]
2017-04-28 9:58 ` David Laight
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