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Date:   Tue, 20 Aug 2019 19:16:40 +0200
From:   Sebastian Siewior <bigeasy@linutronix.de>
To:     Christoph Hellwig <hch@infradead.org>
Cc:     Thomas Gleixner <tglx@linutronix.de>,
        LKML <linux-kernel@vger.kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Ingo Molnar <mingo@kernel.org>,
        Anna-Maria Gleixner <anna-maria@linutronix.de>,
        Steven Rostedt <rostedt@goodmis.org>,
        Julia Cartwright <julia@ni.com>, Jan Kara <jack@suse.cz>,
        Theodore Tso <tytso@mit.edu>,
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        Alexander Viro <viro@zeniv.linux.org.uk>,
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        Jan Kara <jack@suse.com>, Mark Fasheh <mark@fasheh.com>,
        Joseph Qi <joseph.qi@linux.alibaba.com>,
        Joel Becker <jlbec@evilplan.org>
Subject: Re: [patch V2 0/7] fs: Substitute bit-spinlocks for PREEMPT_RT and
 debugging
Message-ID: <20190820171640.elgrbetjivvk7zti@linutronix.de>
References: <20190801010126.245731659@linutronix.de>
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 <20190806061119.GA17492@infradead.org>
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On 2019-08-10 01:18:34 [-0700], Christoph Hellwig wrote:
> > > Does SLUB work on -rt at all?
> > 
> > It's the only allocator we support with a few tweaks :)
> 
> What do you do about this particular piece of code there?

This part remains untouched. This "lock" is acquired within ->list_lock
which is a raw_spinlock_t and disables preemption/interrupts on -RT.

Sebastian