linux-kernel - Re: [PATCH v4 1/4] locking: Add rwsem_assert_held() and rwsem_assert_held

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Message-ID: <20231120115233.GT8262@noisy.programming.kicks-ass.net>
Date:   Mon, 20 Nov 2023 12:52:33 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     "Matthew Wilcox (Oracle)" <willy@...radead.org>
Cc:     Ingo Molnar <mingo@...hat.com>, Will Deacon <will@...nel.org>,
        Waiman Long <longman@...hat.com>, linux-kernel@...r.kernel.org,
        linux-mm@...ck.org, Chandan Babu R <chandan.babu@...cle.com>,
        "Darrick J . Wong" <djwong@...nel.org>, linux-xfs@...r.kernel.org,
        Mateusz Guzik <mjguzik@...il.com>
Subject: Re: [PATCH v4 1/4] locking: Add rwsem_assert_held() and
 rwsem_assert_held_write()

On Fri, Nov 17, 2023 at 02:51:39PM +0000, Matthew Wilcox (Oracle) wrote:
> Modelled after lockdep_assert_held() and lockdep_assert_held_write(),
> but are always active, even when lockdep is disabled.  Of course, they
> don't test that _this_ thread is the owner, but it's sufficient to catch
> many bugs and doesn't incur the same performance penalty as lockdep.
> 
> Signed-off-by: Matthew Wilcox (Oracle) <willy@...radead.org>

Acked-by: Peter Zijlstra (Intel) <peterz@...radead.org>