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From: Thomas Gleixner <tglx@linutronix.de>
To: Holger Schurig <holgerschurig@gmail.com>
Cc: linux-kernel@vger.kernel.org, Ingo Molnar <mingo@redhat.com>,
	x86@kernel.org
Subject: Re: BUG: "do_IRQ: 0.39 No irq handler for vector" from a 16550 port
Date: Sun, 4 Nov 2018 11:19:49 +0100 (CET)	[thread overview]
Message-ID: <alpine.DEB.2.21.1811041110380.3160@nanos.tec.linutronix.de> (raw)
In-Reply-To: <87h8gzfr2p.fsf@gmail.com>

On Fri, 2 Nov 2018, Holger Schurig wrote:

> I said that kernel 4.9 doesn't show the issue. The same was for later
> kernels up to 4.13.
> 
> I had a compilation issue with 4.14 (which I later solved, something
> unrelated with tools/objcopy when compiling for a different
> architecture), so I did a git bisect between v4.13 and v4.15. This is
> the outcome:
>
> git bisect bad 464d12309e1b5829597793db551ae8ecaecf4036
> # first bad commit: [464d12309e1b5829597793db551ae8ecaecf4036] x86/vector: Switch IOAPIC to global reservation mode

Which is not surprising because the old model just hid the issue of
interrupts which came in after the interrupt had been torn down.

I have no idea what causes this, but it seems to be related to the
particular hardware/BIOS combination.

Thanks,

	tglx




      reply	other threads:[~2018-11-04 10:21 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-11-02 10:58 BUG: "do_IRQ: 0.39 No irq handler for vector" from a 16550 port Holger Schurig
2018-11-02 15:15 ` Holger Schurig
2018-11-04 10:19   ` Thomas Gleixner [this message]

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