linux-kernel - Re: [PATCH] locking/lockdep: Enforce PROVE_RAW_LOCK_NESTING only if ARCH_SUPPORTS

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Message-ID: <e40965ae-cb21-4b23-b393-a86a1f601236@redhat.com>
Date: Wed, 27 Nov 2024 19:00:29 -0500
From: Waiman Long <llong@...hat.com>
To: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>,
 Will Deacon <will.deacon@....com>, Boqun Feng <boqun.feng@...il.com>,
 linux-kernel@...r.kernel.org, Guenter Roeck <linux@...ck-us.net>
Subject: Re: [PATCH] locking/lockdep: Enforce PROVE_RAW_LOCK_NESTING only if
 ARCH_SUPPORTS_RT


On 11/27/24 11:44 AM, Sebastian Andrzej Siewior wrote:
> On 2024-11-26 18:11:54 [-0500], Waiman Long wrote:
>> Relax the rule to set PROVE_RAW_LOCK_NESTING by default only for arches
>> that supports PREEMPT_RT.  For arches that do not support PREEMPT_RT,
>> they will not be forced to address irrelevant raw lock nesting issues
>> when they want to enable PROVE_LOCKING.
> I don't like the wording here. It is not "irrelevant raw lock nesting
> issues". This is documented in Documentation/locking/locktypes.rst.
> *IFF* we agree to ignore those because we don't want PREEMPT_RT on
> certain architectures then okay. But please don't describe it as
> irrelevant.

Sorry for that. I will post a v2 patch to fix the wording.

Cheers,
Longman