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Date: Thu, 12 Oct 2017 15:46:17 -0700 From: "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> To: Steven Rostedt <rostedt@...dmis.org> Cc: LKML <linux-kernel@...r.kernel.org>, Andrew Morton <akpm@...ux-foundation.org> Subject: Re: [PATCH] tracing, rcu: Remove no longer used trace event rcu_prep_idle On Thu, Oct 12, 2017 at 06:32:39PM -0400, Steven Rostedt wrote: > On Thu, 12 Oct 2017 15:26:45 -0700 > "Paul E. McKenney" <paulmck@...ux.vnet.ibm.com> wrote: > > > On Thu, Oct 12, 2017 at 06:12:57PM -0400, Steven Rostedt wrote: > > > From: Steven Rostedt (VMware) <rostedt@...dmis.org> > > > > > > Commit c0f4dfd4f90 ("rcu: Make RCU_FAST_NO_HZ take advantage of > > > numbered callbacks") removed the only instances of trace_rcu_prep_idle, > > > but did not remove the TRACE_EVENT() that creates it. As defined trace > > > events take up memory within the kernel even when they are not used, > > > this is a waste of space. Remove the obsolete event. > > > > > > Signed-off-by: Steven Rostedt (VMware) <rostedt@...dmis.org> > > > > Good catch, queued for review and testing, thank you! > > > > Slight change in the context of the final hunk of the patch for -rcu, > > updated version shown below. > > I now have a utility that complains when tracepoints are not used. But > I'm working on getting this to work at build time and not run time. In > the mean time, I might as well do some clean up ;-) Well, I just today learned that I am not supposed to be using the %p printk format option, so been doing a bit of cleaning here as well. ;-) Thanx, Paul
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