Re: [PATCH] Doc: lockdep: add information about performance impact

From: Will Deacon
Date: Tue Oct 09 2018 - 11:58:22 EST

On Tue, Oct 09, 2018 at 05:43:59PM +0200, Peter Zijlstra wrote:
> On Tue, Oct 09, 2018 at 05:39:27PM +0200, Lukasz Luba wrote:
> > This patch add some warning related to performance drop.
> > It should be mentioned that this is not for free
> > and the platfrom resources (cache, bus interconnect, etc.)
> > will be used more frequently.
> To me this reads a bit like: water is wet.
> Is this really needed?

I don't think so -- this is a debug option under "kernel hacking". Surely
the perf hit comes with the territory.