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Subject: Re: WARNING and PANIC in irq_matrix_free
To:     Thomas Gleixner <tglx@linutronix.de>,
        Song Liu <liu.song.a23@gmail.com>
Cc:     Dmitry Safonov <0x7f454c46@gmail.com>,
        open list <linux-kernel@vger.kernel.org>,
        Maor Gottlieb <maorg@mellanox.com>, kernel-team@fb.com
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From:   Tariq Toukan <tariqt@mellanox.com>
Message-ID: <1b4ded38-f217-fafa-d920-cddf980a685c@mellanox.com>
Date:   Mon, 28 May 2018 14:17:00 +0300
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On 28/05/2018 1:53 PM, Thomas Gleixner wrote:
> On Fri, 25 May 2018, Song Liu wrote:
>> On Wed, May 23, 2018 at 1:49 AM, Thomas Gleixner <tglx@linutronix.de> wrote:
>>> On Wed, 23 May 2018, Tariq Toukan wrote:
>>>> I have your patch merged into my internal branch, it prints the following:
>>>>
>>>> [ 4898.226258] Trying to clear prev_vector: 0
>>>> [ 4898.226439] Trying to clear prev_vector: 0
>>>>
>>>> i.e. vector(0) is lower than FIRST_EXTERNAL_VECTOR.
>>>
>>> Could you please enable the vector and irq matrix trace points and capture
>>> the trace when this happens?
> 
> Does the patch below fix it?
> 
> Thanks,
> 
> 	tglx
> 
> 8<-------------------
> diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c
> index bb6f7a2148d7..54af3d4884b1 100644
> --- a/arch/x86/kernel/apic/vector.c
> +++ b/arch/x86/kernel/apic/vector.c
> @@ -148,6 +148,7 @@ static void apic_update_vector(struct irq_data *irqd, unsigned int newvec,
>   	 * prev_vector for this and the offlined target case.
>   	 */
>   	apicd->prev_vector = 0;
> +	apicd->move_in_progress = false;
>   	if (!apicd->vector || apicd->vector == MANAGED_IRQ_SHUTDOWN_VECTOR)
>   		goto setnew;
>   	/*
> 

I took it into my internal branch. Will let you know.

Tariq