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Date: Tue, 03 Nov 2020 16:22:19 +0100 From: Thomas Gleixner <tglx@...utronix.de> To: lkp <oliver.sang@...el.com>, David Woodhouse <dwmw@...zon.co.uk> Cc: LKML <linux-kernel@...r.kernel.org>, x86@...nel.org, lkp@...ts.01.org, lkp@...el.com Subject: Re: [x86/ioapic] b643128b91: Kernel panic - not syncing: timer doesn't work through Interrupt-remapped IO-APIC 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
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