From: Peter Zijlstra <peterz@infradead.org>
To: Wander Lairson Costa <wander@redhat.com>
Cc: Ingo Molnar <mingo@redhat.com>,
Juri Lelli <juri.lelli@redhat.com>,
Vincent Guittot <vincent.guittot@linaro.org>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Steven Rostedt <rostedt@goodmis.org>,
Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
Valentin Schneider <vschneid@redhat.com>,
Masami Hiramatsu <mhiramat@kernel.org>,
Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
Andrew Morton <akpm@linux-foundation.org>,
"open list:SCHEDULER" <linux-kernel@vger.kernel.org>,
"open list:TRACING" <linux-trace-kernel@vger.kernel.org>,
acme@kernel.org, williams@redhat.com, gmonaco@redhat.com
Subject: Re: [PATCH v3 1/4] tracing/preemptirq: Optimize preempt_disable/enable() tracepoint overhead
Date: Fri, 13 Mar 2026 10:04:04 +0100 [thread overview]
Message-ID: <20260313090404.GK606826@noisy.programming.kicks-ass.net> (raw)
In-Reply-To: <abLzS0T_wEt_SkL6@fedora>
On Thu, Mar 12, 2026 at 02:19:15PM -0300, Wander Lairson Costa wrote:
> > That's significant bloat, for really very little gain. Realistically
> > nobody is going to need these.
> >
>
> Of course, I can't speak for others, but more than once I debugged issues
> that those tracepoints had made my life far easier. Those cases convinced
> me that such a feature would be worth it. But if you don't see
> value and will reject the patches no matter what, nothing can be done,
> and I will have to accept defeat.
If distros are going to enable this, I suppose I'm not going to stop
this. But I do very much worry about the general bloat of things, there
are a *LOT* of preempt_{dis,en}able() sites.
next prev parent reply other threads:[~2026-03-13 9:04 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-11 12:50 [PATCH v3 0/4] tracing/preemptirq: Optimize disabled tracepoint overhead Wander Lairson Costa
2026-03-11 12:50 ` [PATCH v3 1/4] tracing/preemptirq: Optimize preempt_disable/enable() " Wander Lairson Costa
2026-03-11 19:35 ` Peter Zijlstra
2026-03-12 17:19 ` Wander Lairson Costa
2026-03-13 9:04 ` Peter Zijlstra [this message]
2026-03-13 15:36 ` Wander Lairson Costa
2026-04-28 18:51 ` Steven Rostedt
2026-04-28 19:05 ` Wander Lairson Costa
2026-03-11 12:50 ` [PATCH v3 2/4] trace/preemptirq: make TRACE_PREEMPT_TOGGLE user-selectable Wander Lairson Costa
2026-03-11 12:50 ` [PATCH v3 3/4] trace/preemptirq: add TRACE_IRQFLAGS_TOGGLE Wander Lairson Costa
2026-03-11 12:50 ` [PATCH v3 4/4] trace/preemptirq: Implement trace_irqflags hooks Wander Lairson Costa
2026-03-11 19:43 ` Peter Zijlstra
2026-03-11 19:48 ` Steven Rostedt
2026-03-11 19:53 ` Peter Zijlstra
2026-03-11 20:07 ` Steven Rostedt
2026-03-11 20:46 ` Peter Zijlstra
2026-03-11 23:16 ` Steven Rostedt
2026-03-12 17:09 ` Wander Lairson Costa
2026-04-28 18:54 ` Steven Rostedt
2026-04-28 19:04 ` Wander Lairson Costa
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