linux-kernel - Re: [PATCH] mm: slub: annotate kmem_cache_node->list_lock as raw

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Message-ID: <20230412215557.05df918e@gandalf.local.home>
Date:   Wed, 12 Apr 2023 21:55:57 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     Joel Fernandes <joel@...lfernandes.org>
Cc:     Qi Zheng <zhengqi.arch@...edance.com>,
        "Zhang, Qiang1" <qiang1.zhang@...el.com>,
        Boqun Feng <boqun.feng@...il.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        "42.hyeyoo@...il.com" <42.hyeyoo@...il.com>,
        "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
        "roman.gushchin@...ux.dev" <roman.gushchin@...ux.dev>,
        "iamjoonsoo.kim@....com" <iamjoonsoo.kim@....com>,
        "rientjes@...gle.com" <rientjes@...gle.com>,
        "penberg@...nel.org" <penberg@...nel.org>,
        "cl@...ux.com" <cl@...ux.com>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Zhao Gongyi <zhaogongyi@...edance.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Thomas Gleixner <tglx@...utronix.de>,
        RCU <rcu@...r.kernel.org>,
        "Paul E . McKenney" <paulmck@...nel.org>
Subject: Re: [PATCH] mm: slub: annotate kmem_cache_node->list_lock as
 raw_spinlock

On Wed, 12 Apr 2023 20:24:19 -0400
Joel Fernandes <joel@...lfernandes.org> wrote:

> I think it would be better to fix PROVE_LOCKING / CONFIG_PREEMPT_RT
> instead of degrading !CONFIG_PREEMPT_RT just to satisfy a
> false-positive report.

I think getting Peter's patch working:

  https://lore.kernel.org/all/20230412124735.GE628377@hirez.programming.kicks-ass.net/

is the real solution.

-- Steve