linux-kernel - Re: [RFC PATCH 0/4] Add hazard pointers to kernel

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Message-ID: <CAHk-=wi76E2xxvOaZtgN2FK9YKmbK1ru_1atL8eBCs34z7UigA@mail.gmail.com>
Date: Wed, 18 Sep 2024 09:18:43 +0200
From: Linus Torvalds <torvalds@...ux-foundation.org>
To: Boqun Feng <boqun.feng@...il.com>
Cc: linux-kernel@...r.kernel.org, rcu@...r.kernel.org, linux-mm@...ck.org, 
	lkmm@...r.kernel.org, "Paul E. McKenney" <paulmck@...nel.org>, 
	Frederic Weisbecker <frederic@...nel.org>, Neeraj Upadhyay <neeraj.upadhyay@...nel.org>, 
	Joel Fernandes <joel@...lfernandes.org>, Josh Triplett <josh@...htriplett.org>, 
	Uladzislau Rezki <urezki@...il.com>, Steven Rostedt <rostedt@...dmis.org>, 
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>, Lai Jiangshan <jiangshanlai@...il.com>, 
	Zqiang <qiang.zhang1211@...il.com>, Peter Zijlstra <peterz@...radead.org>, 
	Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>, Waiman Long <longman@...hat.com>, 
	Mark Rutland <mark.rutland@....com>, Thomas Gleixner <tglx@...utronix.de>, 
	Kent Overstreet <kent.overstreet@...il.com>, Vlastimil Babka <vbabka@...e.cz>, maged.michael@...il.com
Subject: Re: [RFC PATCH 0/4] Add hazard pointers to kernel

On Tue, 17 Sept 2024 at 16:34, Boqun Feng <boqun.feng@...il.com> wrote:
>
> This series introduces hazard pointers [1] to kernel space. A TL;DR
> description of hazard pointers is "a scalable refcounting mechanim
> with RCU-like API". More information can be found at [2].

Please give actual "this is useful for X, and here is an actual real
load with numbers showing why it matters".

We don't just merge random infrastructure without a use-case and an
argument for it.

                 Linus