Date: Tue, 17 Feb 2015 22:26:53 +0200 From: Konstantin Belousov <kostikbel@gmail.com> To: sbruno@freebsd.org Cc: FreeBSD CURRENT <freebsd-current@freebsd.org> Subject: Re: Xen HVM Panic, HEAD Message-ID: <20150217202653.GW34251@kib.kiev.ua> In-Reply-To: <54E39DC4.4010802@ignoranthack.me> References: <54E2BF1E.4090002@ignoranthack.me> <20150217085657.GR34251@kib.kiev.ua> <54E39DC4.4010802@ignoranthack.me>
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On Tue, Feb 17, 2015 at 12:00:04PM -0800, Sean Bruno wrote: > -----BEGIN PGP SIGNED MESSAGE----- > Hash: SHA512 > > On 02/17/15 00:56, Konstantin Belousov wrote: > > On Mon, Feb 16, 2015 at 08:10:06PM -0800, Sean Bruno wrote: > >> -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 > >> > >> https://people.freebsd.org/~sbruno/Xen_APIC_panic.png > >> > >> I suspect that there may be one or two more lines above this that > >> are relevant to this panic, but XENHVM kernel's now panic booting > >> on Xen server. The working kernel output looks like this: > >> > >> FreeBSD clang version 3.4.1 (tags/RELEASE_34/dot1-final 208032) > >> 20140512 XEN: Hypervisor version 4.2 detected. CPU: Intel(R) > >> Xeon(R) CPU E5620 @ 2.40GHz (2400.05-MHz K8-class > >> CPU) Origin="GenuineIntel" Id=0x206c2 Family=0x6 Model=0x2c > >> Stepping=2 > >> Features=0x1783fbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,MMX,FXSR,SSE,SSE2,HTT> > >> > >> > Features2=0x81ba2201<SSE3,SSSE3,CX16,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,TSCDLT,HV> > >> AMD Features=0x28100800<SYSCALL,NX,RDTSCP,LM> AMD > >> Features2=0x1<LAHF> Hypervisor: Origin = "XenVMMXenVMM" real > >> memory = 1434451968 (1368 MB) avail memory = 1353293824 (1290 > >> MB) Event timer "LAPIC" quality 400 ACPI APIC Table: <Xen HVM> > >> FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs FreeBSD/SMP: > >> 1 package(s) x 2 core(s) cpu0 (BSP): APIC ID: 0 cpu1 (AP): APIC > >> ID: 2 ioapic0: Changing APIC ID to 1 MADT: Forcing active-low > >> polarity and level trigger for SCI > > I am not sure why your machine uses native lapic instead of xen > > lapic, and should it be other way, or not. > > > > Regardless, show the line number for the ipi_startup+0x56. Did you > > performed clean kernel build ? > > > > > > I have rebuilt a kernel/world based on head at svn r276627. I have > delete /usr/obj completely and started from scratch. > > Updated kernelpanic image at > https://people.freebsd.org/~sbruno/Xen_APIC_panic.png > > /usr/src/sys/x86/include # kgdb /boot/kernel/kernel > GNU gdb 6.1.1 [FreeBSD] > Copyright 2004 Free Software Foundation, Inc. > GDB is free software, covered by the GNU General Public License, and > you are > welcome to change it and/or distribute copies of it under certain > conditions. > Type "show copying" to see the conditions. > There is absolutely no warranty for GDB. Type "show warranty" for > details. > This GDB was configured as "amd64-marcel-freebsd"... > (kgdb) list *(ipi_startup+0x56) > 0xffffffff80e088c6 is in ipi_startup (apicvar.h:383). > 378 > 379 static inline int > 380 lapic_ipi_wait(int delay) > 381 { > 382 > 383 return (apic_ops.ipi_wait(delay)); > 384 } > 385 > 386 static inline int > 387 lapic_set_lvt_mask(u_int apic_id, u_int lvt, u_char masked) > Please disassemble your ipi_startup, also please do 'p *apic_ops'.
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