From: Peter Zijlstra <peterz@infradead.org>
To: Frederic Weisbecker <frederic@kernel.org>
Cc: LKML <linux-kernel@vger.kernel.org>,
Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
"Paul E . McKenney" <paulmck@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [RFC PATCH 2/3] lockdep: Merge hardirq_threaded and irq_config together
Date: Mon, 23 Mar 2020 15:02:20 +0100 [thread overview]
Message-ID: <20200323140220.GK2452@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <20200323033207.32370-3-frederic@kernel.org>
On Mon, Mar 23, 2020 at 04:32:06AM +0100, Frederic Weisbecker wrote:
> These fields describe the same state: a code block running in hardirq
> that might be threaded under specific configurations.
>
> Merge them together in the same field. Also rename the result as
> "hardirq_threadable" as we are talking about a possible state and not
> an actual one.
What isn't instantly obvious is that they cannot overlap. For instance
mainline with force threaded interrupt handlers on, can't that have the
irq_work nest inside a threaded handler ?
I *think* it just about works out, but it definitely wants a little more
than this.
next prev parent reply other threads:[~2020-03-23 14:02 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-23 3:32 [RFC PATCH 0/3] lockdep/irq: wait-type related cleanups Frederic Weisbecker
2020-03-23 3:32 ` [RFC PATCH 1/3] lockdep/irq: Be more strict about IRQ-threadable code end Frederic Weisbecker
2020-03-23 13:53 ` Peter Zijlstra
2020-03-23 15:30 ` Frederic Weisbecker
2020-03-23 16:31 ` Peter Zijlstra
2020-03-24 3:20 ` Frederic Weisbecker
2020-03-23 3:32 ` [RFC PATCH 2/3] lockdep: Merge hardirq_threaded and irq_config together Frederic Weisbecker
2020-03-23 14:02 ` Peter Zijlstra [this message]
2020-03-23 14:53 ` Sebastian Andrzej Siewior
2020-03-23 16:14 ` Frederic Weisbecker
2020-03-23 3:32 ` [RFC PATCH 3/3] lockdep: Briefly comment current->hardirq_threadable usecases Frederic Weisbecker
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