Re: [PATCH v2 21/27] coresight: Convert driver messages to dev_dbg
From: Kim Phillips
Date: Tue May 01 2018 - 23:55:12 EST
On Tue, 1 May 2018 10:10:51 +0100
Suzuki K Poulose <suzuki.poulose@xxxxxxx> wrote:
> Convert component enable/disable messages from dev_info to dev_dbg.
> This is required to prevent LOCKDEP splats when operating in perf
> mode where we could be called with locks held to enable a coresight
Can we see the splats? Doesn't lockdep turn itself off if it starts
triggering too many splats?
> path. If someone wants to really see the messages, they can always
> enable it at runtime via dynamic_debug.
Won't the splats still occur when the messages are enabled with
dynamic_debug?
So in effect this patch only tries to mitigate the splats, all the
while making things harder for regular users that now have to recompile
their kernels, in exchange for a very small convenience for kernel
developers that happen to see a splat or two with DEBUG_LOCKDEP set?
Not the greatest choice...How about moving the dev_infos outside of the
locks instead?
Thanks,
Kim