linux-kernel - Re: WARNING: CPU: 0 PID: 0 at drivers/irqchip/irq-gic-v3-its.c

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Message-ID: <b23b62b4-9ecb-8b76-57e5-d323cc9926ce@arm.com>
Date:   Fri, 9 Nov 2018 13:50:40 +0000
From:   Marc Zyngier <marc.zyngier@....com>
To:     Qian Cai <cai@....us>
Cc:     linux-kernel@...r.kernel.org, Thomas Gleixner <tglx@...utronix.de>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Jason Cooper <jason@...edaemon.net>
Subject: Re: WARNING: CPU: 0 PID: 0 at drivers/irqchip/irq-gic-v3-its.c

On 09/11/18 12:28, Qian Cai wrote:
> 
> On 11/9/18 at 7:08 AM, Marc Zyngier wrote:
> 
>> [+Ard]
>>
>> On 08/11/18 20:59, Qian Cai wrote:
>>> Just booting up the latest git master (b00d209) on an aarch64 server and saw
>>> this. Not sure about the third warning (at kernel/cpu.c:315
>>> lockdep_assert_cpus_held+0x50/0x60) relates to irqchip or not, but appended it
>>> to here anyway just in case.
>>>
>>> [    0.000000] WARNING: CPU: 0 PID: 0 at drivers/irqchip/irq-gic-v3-its.c:1696
>>> its_init+0x588/0xb54
>>
>> It looks like EFI cannot manage to reserve the memory for your GIC
>> redistributors. Pretty annoying. At the same time, you have reported
>> other issues with the EFI reservation mechanism, such as:
>>
>> https://lore.kernel.org/patchwork/patch/1008413/
>>
>> for which you have given a "Tested-by:". Is that related?
> No, I don’t think so. Those warnings are still there even after applied the patch above.

Do you also have this series[1] applied? I'd otherwise need your
configuration to try and reproduce it, as I can't manage to trigger it
on my own setup.

Thanks,

	M.

[1] https://www.spinics.net/lists/arm-kernel/msg685751.html
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