linux-kernel - Re: [PATCH 00/14] replace call_rcu by kfree_rcu for simple kmem_cache

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Message-ID: <20240612143305.451abf58@kernel.org>
Date: Wed, 12 Jun 2024 14:33:05 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Julia Lawall <Julia.Lawall@...ia.fr>
Cc: linux-block@...r.kernel.org, kernel-janitors@...r.kernel.org,
 bridge@...ts.linux.dev, linux-trace-kernel@...r.kernel.org, Mathieu
 Desnoyers <mathieu.desnoyers@...icios.com>, kvm@...r.kernel.org,
 linuxppc-dev@...ts.ozlabs.org, "Naveen N. Rao"
 <naveen.n.rao@...ux.ibm.com>, Christophe Leroy
 <christophe.leroy@...roup.eu>, Nicholas Piggin <npiggin@...il.com>,
 netdev@...r.kernel.org, wireguard@...ts.zx2c4.com,
 linux-kernel@...r.kernel.org, ecryptfs@...r.kernel.org, Neil Brown
 <neilb@...e.de>, Olga Kornievskaia <kolga@...app.com>, Dai Ngo
 <Dai.Ngo@...cle.com>, Tom Talpey <tom@...pey.com>,
 linux-nfs@...r.kernel.org, linux-can@...r.kernel.org, Lai Jiangshan
 <jiangshanlai@...il.com>, netfilter-devel@...r.kernel.org,
 coreteam@...filter.org, "Paul E . McKenney" <paulmck@...nel.org>, Vlastimil
 Babka <vbabka@...e.cz>
Subject: Re: [PATCH 00/14] replace call_rcu by kfree_rcu for simple
 kmem_cache_free callback

On Sun,  9 Jun 2024 10:27:12 +0200 Julia Lawall wrote:
> Since SLOB was removed, it is not necessary to use call_rcu
> when the callback only performs kmem_cache_free. Use
> kfree_rcu() directly.
> 
> The changes were done using the following Coccinelle semantic patch.
> This semantic patch is designed to ignore cases where the callback
> function is used in another way.

How does the discussion on:
  [PATCH] Revert "batman-adv: prefer kfree_rcu() over call_rcu() with free-only callbacks"
  https://lore.kernel.org/all/20240612133357.2596-1-linus.luessing@c0d3.blue/
reflect on this series? IIUC we should hold off..