linux-kernel - Re: [PATCH 0/6] locking/rtmutex: Avoid PI state recursion through sched_submit

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Message-ID: <20230816101902.Pz8wdats@linutronix.de>
Date:   Wed, 16 Aug 2023 12:19:02 +0200
From:   Sebastian Andrzej Siewior <bigeasy@...utronix.de>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     tglx@...utronix.de, linux-kernel@...r.kernel.org,
        bsegall@...gle.com, boqun.feng@...il.com, swood@...hat.com,
        bristot@...hat.com, dietmar.eggemann@....com, mingo@...hat.com,
        jstultz@...gle.com, juri.lelli@...hat.com, mgorman@...e.de,
        rostedt@...dmis.org, vschneid@...hat.com,
        vincent.guittot@...aro.org, longman@...hat.com, will@...nel.org
Subject: Re: [PATCH 0/6] locking/rtmutex: Avoid PI state recursion through
 sched_submit_work()

On 2023-08-16 11:42:57 [+0200], Peter Zijlstra wrote:
> Not the same -- this is namespace_lock(), right? That's a regular rwsem
> afaict and that *should* be good. Clearly I messed something up.

Most likely. I do see it also fom inode_lock() which does down_write().
I see it only to originate from rwbase_write_lock().

> Thanks!

Sebastian