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From:   Thomas Gleixner <tglx@linutronix.de>
To:     lkp <oliver.sang@intel.com>, David Woodhouse <dwmw@amazon.co.uk>
Cc:     LKML <linux-kernel@vger.kernel.org>, x86@kernel.org,
        lkp@lists.01.org, lkp@intel.com
Subject: Re: [x86/ioapic] b643128b91: Kernel panic - not syncing: timer doesn't work through Interrupt-remapped IO-APIC
In-Reply-To: <20201103143130.GA5804@xsang-OptiPlex-9020>
References: <20201103143130.GA5804@xsang-OptiPlex-9020>
Date:   Tue, 03 Nov 2020 16:22:19 +0100
Message-ID: <871rha31p0.fsf@nanos.tec.linutronix.de>
MIME-Version: 1.0
Content-Type: text/plain
Precedence: bulk

Hi!

On Tue, Nov 03 2020 at 22:31, lkp wrote:
> FYI, we noticed the following commit (built with gcc-9):
>
> commit: b643128b917ca8f1c8b1e14af64ebdc81147b2d1 ("x86/ioapic: Use irq_find_matching_fwspec() to find remapping irqdomain")
>
> [    3.148819] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
> [    3.154825] DMAR: DRHD: handling fault status reg 2
> [    3.159701] DMAR: [INTR-REMAP] Request device [f0:1f.7] fault index 0 [fault reason 37] Blocked a compatibility format interrupt request
> [    3.173870] Kernel panic - not syncing: timer doesn't work through Interrupt-remapped IO-APIC
> [    3.182381] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.10.0-rc1-00029-gb643128b917c #1
> [    3.190370] Hardware name: Supermicro SYS-5018D-FN4T/X10SDV-8C-TLN4F, BIOS 1.1 03/02/2016
> [    3.198534] Call Trace:
> [    3.200983]  dump_stack+0x57/0x6a
> [    3.204298]  panic+0x102/0x2d2
> [    3.207349]  panic_if_irq_remap.cold+0x5/0x5
> [    3.211613]  check_timer+0x1f6/0x694
> [    3.215184]  ? printk+0x58/0x6f
> [    3.218320]  setup_IO_APIC+0x17b/0x1c3
> [    3.222067]  x86_late_time_init+0x20/0x30
> [    3.226077]  start_kernel+0x40c/0x4c7
> [    3.229734]  secondary_startup_64_no_verify+0xb8/0xbb

It's not reproducing here. Can you please redo the test with
apic=verbose on the kernel command line and provide the full dmesg
output?

Thanks,

        tglx