linux-kernel - Re: WARNING and PANIC in irq_matrix

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Message-ID: <alpine.DEB.2.21.1805281251140.1578@nanos.tec.linutronix.de>
Date:   Mon, 28 May 2018 12:53:19 +0200 (CEST)
From:   Thomas Gleixner <tglx@...utronix.de>
To:     Song Liu <liu.song.a23@...il.com>
cc:     Tariq Toukan <tariqt@...lanox.com>,
        Dmitry Safonov <0x7f454c46@...il.com>,
        open list <linux-kernel@...r.kernel.org>,
        Maor Gottlieb <maorg@...lanox.com>, kernel-team@...com
Subject: Re: WARNING and PANIC in irq_matrix_free

On Fri, 25 May 2018, Song Liu wrote:
> On Wed, May 23, 2018 at 1:49 AM, Thomas Gleixner <tglx@...utronix.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;
 	/*