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From: Grygorii Strashko <grygorii.strashko@ti.com>
To: Sebastian Andrzej Siewior <bigeasy@linutronix.de>,
	Thomas Gleixner <tglx@linutronix.de>,
	<linux-rt-users@vger.kernel.org>
Cc: <linux-kernel@vger.kernel.org>, Sekhar Nori <nsekhar@ti.com>
Subject: Re: [v4.1.10-rt10][PATCH 0/2] PCI: dra7xx/dwc: fix "WARNING: CPU: 1 PID: 82 at kernel/irq/handle.c:150 handle_irq_event_percpu"
Date: Tue, 3 Nov 2015 21:11:10 +0200	[thread overview]
Message-ID: <563906CE.6090707@ti.com> (raw)
In-Reply-To: <5638BAAE.6050909@linutronix.de>

On 11/03/2015 03:46 PM, Sebastian Andrzej Siewior wrote:
> On 11/02/2015 08:30 PM, Grygorii Strashko wrote:
>> On -RT above code will generate warnings, because driver_xx_hw_irq_handler()
>> will be forced threaded (by default) and, as result, generic_handle_irq()
>> will be called with IRQs enabled. To W/A this issue generic_handle_irq() can
>> be surrounded by raw_spin_lock_irqsave/irqrestore(wa_lock).
> 
> and what happens without -RT if you boot threadedirqs?
> 

Yep. It will still warn :( Can be reworked to cover this case also, i think
(if overall concept will be accepted) 


Thanks.
-- 
regards,
-grygorii

  reply	other threads:[~2015-11-03 19:11 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-11-02 19:30 [v4.1.10-rt10][PATCH 0/2] PCI: dra7xx/dwc: fix "WARNING: CPU: 1 PID: 82 at kernel/irq/handle.c:150 handle_irq_event_percpu" Grygorii Strashko
2015-11-02 19:30 ` [v4.1.10-rt10][PATCH 1/2] genirq: introduce new generic_handle_irq_rt_wa() api Grygorii Strashko
2015-11-02 19:38   ` Thomas Gleixner
2015-11-03 19:11     ` Grygorii Strashko
2015-11-03 19:51       ` Thomas Gleixner
2015-11-03 20:18         ` Sebastian Andrzej Siewior
2015-11-05 16:44           ` Grygorii Strashko
2015-11-02 19:30 ` [v4.1.10-rt10] [PATCH 2/2] PCI: dra7xx: fix "WARNING: CPU: 1 PID: 82 at kernel/irq/handle.c:150 handle_irq_event_percpu" Grygorii Strashko
2015-11-03 13:46 ` [v4.1.10-rt10][PATCH 0/2] PCI: dra7xx/dwc: " Sebastian Andrzej Siewior
2015-11-03 19:11   ` Grygorii Strashko [this message]
2015-11-03 20:01     ` Thomas Gleixner

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