Date: Mon, 26 Nov 2018 10:31:43 -0800 From: John Baldwin <jhb@FreeBSD.org> To: Joe Clarke <jclarke@marcuscom.com>, stable@freebsd.org Cc: =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= <royger@FreeBSD.org> Subject: Re: Panic on 11-STABLE with Xen guest Message-ID: <87ec7a7b-f64e-21b7-ac2c-790e2ff70247@FreeBSD.org> In-Reply-To: <00d6d9ae-d5d8-ed88-34ee-2e67c0ca8904@marcuscom.com> References: <00d6d9ae-d5d8-ed88-34ee-2e67c0ca8904@marcuscom.com>
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On 11/22/18 12:39 PM, Joe Clarke wrote: > I believe after the commit 340016 for the dynamic IRQ layout, my Xen VM > started to panic. I just upgraded the kernel today and saw this: > > xen: unable to map IRQ#2 > panic: Unable to register interrupt override > cpuid = 0 > KDB: stack backtrace: > #0 0xffffffff8060a4e7 at kdb_backtrace+0x67 > #1 0xffffffff805c3787 at vpanic+0x177 > #2 0xffffffff805c3603 at panic+0x43 > #3 0xffffffff8093a766 at madt_parse_ints+0x96 > #4 0xffffffff803353f9 at acpi_walk_subtables+0x29 > #5 0xffffffff8093a5e6 at xenpv_register_pirqs+0x56 > #6 0xffffffff80928296 at intr_init_sources+0x116 > #7 0xffffffff8055eba8 at mi_startup+0x118 > #8 0xffffffff8029902c at btext+0x2c > > The following kernel works: > > @(#)FreeBSD 11.2-STABLE #4: Thu Nov 1 02:24:07 EDT 2018 > FreeBSD 11.2-STABLE #4: Thu Nov 1 02:24:07 EDT 2018 > root@creme-brulee:/usr/obj/usr/src/sys/CREME-BRULEE > > The following kernel produces the panic above immediately on boot: > > @(#)FreeBSD 11.2-STABLE #5: Wed Nov 21 11:08:38 EST 2018 > FreeBSD 11.2-STABLE #5: Wed Nov 21 11:08:38 EST 2018 > root@creme-brulee:/usr/obj/usr/src/sys/CREME-BRULEE > > Attached is a screen grab of the console of the panic. Hmm, I don't see any obvious candidates of Xen changes that weren't included in the MFC. I've added royger@ (who maintains Xen in FreeBSD) to the cc to see if he has an idea. Roger, the main changes that aren't MFC'd to 11 from 12/head seem to be some refcounting on event channels and PVHv2 vs PVHv1? -- John Baldwin
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