svn commit: r326376 - head/sys/kern
Don Lewis
truckman at FreeBSD.org
Thu Nov 30 05:13:27 UTC 2017
On 29 Nov, Cy Schubert wrote:
> In message <201711292328.vATNSeOM046518 at repo.freebsd.org>, Hans Petter
> Selasky
> writes:
>> Author: hselasky
>> Date: Wed Nov 29 23:28:40 2017
>> New Revision: 326376
>> URL: https://svnweb.freebsd.org/changeset/base/326376
>>
>> Log:
>> The sched_add() function is not only used when the thread is initially
>> started, but also by the turnstiles to mark a thread as runnable for
>> all locks, for instance sleepqueues do:
>> setrunnable()->sched_wakeup()->sched_add()
>>
>> In r326218 code was added to allow booting from non-zero CPU numbers
>> by setting the ts_cpu field inside the ULE scheduler's sched_add()
>> function. This had an undesired side-effect that prior sched_pin() and
>> sched_bind() calls got disregarded. This patch fixes the
>> initialization of the ts_cpu field for the ULE scheduler to only
>> happen once when the initial thread is constructed during system
>> init. Forking will then later on ensure that a valid ts_cpu value gets
>> copied to all children.
>>
>> Reviewed by: jhb, kib
>> Discussed with: nwhitehorn
>> MFC after: 1 month
>> Differential revision: https://reviews.freebsd.org/D13298
>> Sponsored by: Mellanox Technologies
>>
>> Modified:
>> head/sys/kern/sched_ule.c
>>
>> Modified: head/sys/kern/sched_ule.c
>> =============================================================================
>> =
>> --- head/sys/kern/sched_ule.c Wed Nov 29 21:16:14 2017 (r326375)
>> +++ head/sys/kern/sched_ule.c Wed Nov 29 23:28:40 2017 (r326376)
>> @@ -1405,7 +1405,6 @@ sched_setup(void *dummy)
>>
>> /* Add thread0's load since it's running. */
>> TDQ_LOCK(tdq);
>> - td_get_sched(&thread0)->ts_cpu = curcpu; /* Something valid to start */
>> thread0.td_lock = TDQ_LOCKPTR(TDQ_SELF());
>> tdq_load_add(tdq, &thread0);
>> tdq->tdq_lowpri = thread0.td_priority;
>> @@ -1642,6 +1641,7 @@ schedinit(void)
>> ts0->ts_ltick = ticks;
>> ts0->ts_ftick = ticks;
>> ts0->ts_slice = 0;
>> + ts0->ts_cpu = curcpu; /* set valid CPU number */
>> }
>>
>> /*
>> @@ -2453,7 +2453,6 @@ sched_add(struct thread *td, int flags)
>> * Pick the destination cpu and if it isn't ours transfer to the
>> * target cpu.
>> */
>> - td_get_sched(td)->ts_cpu = curcpu; /* Pick something valid to start */
>> cpu = sched_pickcpu(td, flags);
>> tdq = sched_setcpu(td, cpu, flags);
>> tdq_add(tdq, td, flags);
>>
>
> Hi Hans,
>
> Sorry I didn't get to this sooner: $JOB (and I have a change window in an
> hour).
>
> I sent you a couple of photos from my laptop however I've been able to
> reproduce this on my testbed.
>
> It boots okay without INVARIANTS and and WITNESS however with them it gets
> a double fault.
>
> Type '?' for a list of commands, 'help' for more detailed help.
> OK include /boot/testbed/amd64-current-t
> /
>
> testbed/amd64-current-t (12.0-CURRENT) loader file selected
> /
> unload complete
> vfs.zfs.arc_max set to 1024M
> vm.kmem_size set to 1536M
> vm.kmem_size_max set to 1536M
> currdev set to disk1s3f:
>
> /boot/kernel/kernel text=0xc3262c data=0xc5288+0x3a5048
> syms=[0x8+0x116508+0x8+0x11285a]
> /boot/kernel/if_sk.ko size 0x17cd0 at 0x16c6000
> /boot/kernel/if_nfe.ko size 0x1a710 at 0x16de000
> /boot/kernel/opensolaris.ko size 0xd6e0 at 0x16f9000
> /boot/kernel/zfs.ko size 0x4ef290 at 0x1707000
> /boot/kernel/amdtemp.ko size 0x53d0 at 0x1bf7000
> loading required module 'amdsmn'
> /boot/kernel/amdsmn.ko size 0x2d78 at 0x1bfd000
> /boot/kernel/cpufreq.ko size 0x168c0 at 0x1c00000
> /boot/kernel/tmpfs.ko size 0x203b0 at 0x1c17000
> /boot/kernel/fdescfs.ko size 0x9d98 at 0x1c38000
> /boot/kernel/nullfs.ko size 0xd308 at 0x1c42000
> -
> new kernel has been loaded
>
> OK boot
> Booting...
> GDB: no debug ports present
> KDB: debugger backends: ddb
> KDB: current backend: ddb
> Copyright (c) 1992-2017 The FreeBSD Project.
> Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
> The Regents of the University of California. All rights reserved.
> FreeBSD is a registered trademark of The FreeBSD Foundation.
> FreeBSD 12.0-CURRENT #0 r326382M: Wed Nov 29 19:44:24 PST 2017
> root at bob:/export/obj/opt/src/svn-current/amd64.amd64/sys/BREAK4 amd64
> FreeBSD clang version 5.0.0 (tags/RELEASE_500/final 312559) (based on LLVM
> 5.0.0svn)
> WARNING: WITNESS option enabled, expect reduced performance.
> VT(vga): text 80x25
> CPU: AMD Athlon(tm) 64 X2 Dual Core Processor 5000+ (2612.09-MHz K8-class
> CPU)
> Origin="AuthenticAMD" Id=0x60fb2 Family=0xf Model=0x6b Stepping=2
> Features=0x178bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,M
> CA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2,HTT>
> Features2=0x2001<SSE3,CX16>
> AMD Features=0xea500800<SYSCALL,NX,MMX+,FFXSR,RDTSCP,LM,3DNow!+,3DNow!>
> AMD Features2=0x11f<LAHF,CMP,SVM,ExtAPIC,CR8,Prefetch>
> SVM: NAsids=64
> real memory = 5368709120 (5120 MB)
> avail memory = 5134057472 (4896 MB)
> Event timer "LAPIC" quality 100
> ACPI APIC Table: <Nvidia ASUSACPI>
> FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
> FreeBSD/SMP: 1 package(s) x 2 core(s)
> arc4random: no preloaded entropy cache
> Firmware Warning (ACPI): 32/64X length mismatch in FADT/Pm1aEventBlock:
> 32/8 (20171110/tbfadt-748)
> Firmware Warning (ACPI): 32/64X length mismatch in FADT/Pm1aControlBlock:
> 16/8 (20171110/tbfadt-748)
> Firmware Warning (ACPI): 32/64X length mismatch in FADT/PmTimerBlock: 32/8
> (20171110/tbfadt-748)
> Firmware Warning (ACPI): 32/64X length mismatch in FADT/Gpe0Block: 64/8
> (20171110/tbfadt-748)
> Firmware Warning (ACPI): 32/64X length mismatch in FADT/Gpe1Block: 128/8
> (20171110/tbfadt-748)
> Firmware Warning (ACPI): Invalid length for FADT/Pm1aEventBlock: 8, using
> default 32 (20171110/tbfadt-850)
> Firmware Warning (ACPI): Invalid length for FADT/Pm1aControlBlock: 8, using
> default 16 (20171110/tbfadt-850)
> Firmware Warning (ACPI): Invalid length for FADT/PmTimerBlock: 8, using
> default 32 (20171110/tbfadt-850)
> ioapic0: Changing APIC ID to 4
> ioapic0 <Version 1.1> irqs 0-23 on motherboard
> random: entropy device external interface
> module_register_init: MOD_LOAD (vesa, 0xffffffff80cad0f0, 0) error 19
> nexus0
> vtvga0: <VT VGA driver> on motherboard
> cryptosoft0: <software crypto> on motherboard
> acpi0: <Nvidia ASUSACPI> on motherboard
> ACPI Error: Could not find/resolve named package element: \_PR_.CPU0
> (20171110/dspkginit-513)
> acpi0: Power Button (fixed)
> cpu0: <ACPI CPU> on acpi0
> cpu1: <ACPI CPU> on acpi0
> attimer0: <AT timer> port 0x40-0x43 on acpi0
> Timecounter "i8254" frequency 1193182 Hz quality 0
> Event timer "i8254" frequency 1193182 Hz quality 100
> hpet0: <High Precision Event Timer> iomem 0xfefff000-0xfefff3ff irq 0,8 on
> acpi0
> Timecounter "HPET" frequency 25000000 Hz quality 950
> atrtc0: <AT realtime clock> port 0x70-0x73 on acpi0
> atrtc0: registered as a time-of-day clock, resolution 1.000000s
> Event timer "RTC" frequency 32768 Hz quality 0
> Timecounter "ACPI-fast" frequency 3579545 Hz quality 900
> acpi_timer0: <24-bit timer at 3.579545MHz> port 0x1008-0x100b on acpi0
> acpi_button0: <Power Button> on acpi0
> pcib0: <ACPI Host-PCI bridge> port 0xcf8-0xcff on acpi0
> pci0: <ACPI PCI bus> on pcib0
> pci0: <memory, RAM> at device 0.0 (no driver attached)
> isab0: <PCI-ISA bridge> at device 1.0 on pci0
> isa0: <ISA bus> on isab0
> ohci0: <nVidia nForce MCP55 USB Controller> mem 0xfe02f000-0xfe02ffff irq
> 21 at device 2.0 on pci0
> usbus0 on ohci0
> ehci0: <NVIDIA nForce MCP55 USB 2.0 controller> mem 0xfe02e000-0xfe02e0ff
> irq 22 at device 2.1 on pci0
> usbus1: EHCI version 1.0
> usbus1 on ehci0
> atapci0: <nVidia nForce MCP55 UDMA133 controller> port
> 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xfc00-0xfc0f at device 4.0 on pci0
> ata0: <ATA channel> at channel 0 on atapci0
> ata1: <ATA channel> at channel 1 on atapci0
> atapci1: <nVidia nForce MCP55 SATA300 controller> port
> 0x9f0-0x9f7,0xbf0-0xbf3,0x970-0x977,0xb70-0xb73,0xf700-0xf70f mem
> 0xfe02d000-0xfe02dfff irq 23 at device 5.0 on pci0
> ata2: <ATA channel> at channel 0 on atapci1
> ata3: <ATA channel> at channel 1 on atapci1
> atapci2: <nVidia nForce MCP55 SATA300 controller> port
> 0x9e0-0x9e7,0xbe0-0xbe3,0x960-0x967,0xb60-0xb63,0xf200-0xf20f mem
> 0xfe02c000-0xfe02cfff irq 20 at device 5.1 on pci0
> ata4: <ATA channel> at channel 0 on atapci2
> ata5: <ATA channel> at channel 1 on atapci2
> atapci3: <nVidia nForce MCP55 SATA300 controller> port
> 0xf100-0xf107,0xf000-0xf003,0xef00-0xef07,0xee00-0xee03,0xed00-0xed0f mem
> 0xfe02b000-0xfe02bfff irq 21 at device 5.2 on pci0
> ata6: <ATA channel> at channel 0 on atapci3
> ata7: <ATA channel> at channel 1 on atapci3
> pcib1: <ACPI PCI-PCI bridge> at device 6.0 on pci0
> pci1: <ACPI PCI bus> on pcib1
> pci1: <network, ethernet> at device 6.0 (no driver attached)
> skc0: <D-Link DGE-530T Gigabit Ethernet> port 0xd800-0xd8ff mem
> 0xfdef8000-0xfdefbfff irq 17 at device 7.0 on pci1
> skc0: DGE-530T Gigabit Ethernet Adapter rev. (0x1)
> sk0: <Marvell Semiconductor, Inc. Yukon> on skc0
> sk0: Ethernet address: 00:13:46:73:0c:0d
> miibus0: <MII bus> on sk0
> e1000phy0: <Marvell 88E1011 Gigabit PHY> PHY 0 on miibus0
> e1000phy0: none, 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX,
> 1000baseT, 1000baseT-master, 1000baseT-FDX, 1000baseT-FDX-master, auto
> pci0: <multimedia, HDA> at device 6.1 (no driver attached)
> nfe0: <NVIDIA nForce MCP55 Networking Adapter> port 0xec00-0xec07 mem
> 0xfe02a000-0xfe02afff,0xfe029000-0xfe0290ff,0xfe028000-0xfe02800f irq 23 at
> device 8.0 on pci0
> miibus1: <MII bus> on nfe0
> e1000phy1: <Marvell 88E1116 Gigabit PHY> PHY 1 on miibus1
> e1000phy1: none, 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX,
> 1000baseT, 1000baseT-master, 1000baseT-FDX, 1000baseT-FDX-master, auto,
> auto-flow
> nfe0: Using defaults for TSO: 65518/35/2048
> nfe0: Ethernet address: 00:18:f3:a0:dc:a4
> pcib2: <ACPI PCI-PCI bridge> at device 15.0 on pci0
> pci2: <ACPI PCI bus> on pcib2
> vgapci0: <VGA-compatible display> mem 0xe8000000-0xefffffff,0xfddfe000-0xfdd
> fffff irq 16 at device 0.0 on pci2
> vgapci0: Boot video device
> amdtemp0: <AMD CPU On-Die Thermal Sensors> on hostb3
> acpi_tz0: <Thermal Zone> on acpi0
> fdc0: <floppy drive controller> port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on acpi0
> fd0: <1440-KB 3.5" drive> on fdc0 drive 0
> uart0: <16550 or compatible> port 0x3f8-0x3ff irq 4 flags 0x10 on acpi0
> uart0: console (9600,n,8,1)
> orm0: <ISA Option ROM> at iomem 0xc0000-0xcc7ff on isa0
> vga0: <Generic ISA VGA> at port 0x3c0-0x3df iomem 0xa0000-0xbffff on isa0
> atkbdc0: <Keyboard controller (i8042)> at port 0x60,0x64 on isa0
> atkbd0: <AT Keyboard> irq 1 on atkbdc0
> kbd0 at atkbd0
> atkbd0: [GIANT-LOCKED]
> powernow0: <PowerNow! K8> on cpu0
> powernow1: <PowerNow! K8> on cpu1
> ZFS filesystem version: 5
> ZFS storage pool version: features support (5000)
> Timecounters tick every 1.000 msec
> usbus0: 12Mbps Full Speed USB v1.0
> usbus1: 480Mbps High Speed USB v2.0
> ugen0.1: <nVidia OHCI root HUB> at usbus0
> uhub0: <nVidia OHCI root HUB, class 9/0, rev 1.00/1.00, addr 1> on usbus0
> ugen1.1: <nVidia EHCI root HUB> at usbus1
> uhub1: <nVidia EHCI root HUB, class 9/0, rev 2.00/1.00, addr 1> on usbus1
> uhub0: 10 ports with 10 removable, self powered
> uhub1: 10 ports with 10 removable, self powered
> ada0 at ata0 bus 0 scbus0 target 0 lun 0
> ada0: <SAMSUNG SP0802N TK100-24> ATA-7 device
> ada0: Serial Number S00JJ20X889726
> ada0: 100.000MB/s transfers (UDMA5, PIO 8192bytes)
> ada0: 76351MB (156368016 512 byte sectors)
> ada1 at ata0 bus 0 scbus0 target 1 lun 0
> ada1: <Maxtor 6Y120P0 YAR41BW0> ATA-7 device
> ada1: Serial Number Y327ZJ1E
> ada1: 133.000MB/s transfers (UDMA6, PIO 8192bytes)
> ada1: 117246MB (240121728 512 byte sectors)
> ada2 at ata2 bus 0 scbus2 target 0 lun 0
> ada2: <ST3500413AS JC4B> ATA8-ACS SATA 3.x device
> ada2: Serial Number 6VMRAGM7
> ada2: 300.000MB/s transfers (SATA 2.x, UDMA5, PIO 8192bytes)
> ada2: 476940MB (976773168 512 byte sectors)
> ada3 at ata3 bus 0 scbus3 target 0 lun 0
> ada3: <ST3320620AS 3.ADG> ATA-7 SATA 2.x device
> ada3: Serial Number 9QFA0729
> ada3: 300.000MB/s transfers (SATA 2.x, UDMA5, PIO 8192bytes)
> ada3: 305245MB (625142448 512 byte sectors)
> SMP: AP CPU #1 Launched!
> random: unblocking device.
> WARNING: WITNESS option enabled, expect reduced performance.
> arc4random: no preloaded entropy cache
> arc4random: no preloaded entropy cache
> Trying to mount root from ufs:/dev/ada0s3f [rw]...
> sysctl: kern.ipc.nmbclusters=32768 at line 28: Invalid argument
> Setting hostuuid: 3428e43e-d455-9478-f48e-14a3b4bb94dd.
> Setting hostid: 0x448c33e0.
>
> Fatal double fault
> rip 0xffffffff80793105 rsp 0xfffffe0036358fe0 rbp 0xfffffe0036359150
> rax 0 rdx 0xfffffe00363590f8 rbx 0x2
> rcx 0x1 rsi 0x2 rdi 0
> r8 0xfffffe00363592f0 r9 0xfffffe0036359350 r10 0
> r11 0 r12 0x60 r13 0xfffffe003635b200
> r14 0xfffffe0036359d30 r15 0x60 rflags 0x10002
> cs 0x20 ss 0x28 ds 0x3b es 0x3b fs 0x13 gs 0x1b
> fsbase 0x80063f8b0 gsbase 0xffffffff8142be80 kgsbase 0
> cpuid = 1; apic id = 01
> panic: double fault
> cpuid = 1
> time = 1511985616
> KDB: stack backtrace:
> db_trace_self_wrapper() at db_trace_self_wrapper+0x2c/frame
> 0xfffffe00003fdb40
> kdb_backtrace() at kdb_backtrace+0x53/frame 0xfffffe00003fdc10
> vpanic() at vpanic+0x268/frame 0xfffffe00003fdce0
> kproc_shutdown() at kproc_shutdown/frame 0xfffffe00003fdd40
> dblfault_handler() at dblfault_handler+0x387/frame 0xfffffe00003fdf30
> Xdblfault() at Xdblfault+0xac/frame 0xfffffe00003fdf30
> --- trap 0x17, rip = 0xffffffff80793105, rsp = 0xfffffe0036358fe0, rbp =
> 0xfffffe0036359150 ---
> cpu_search_lowest() at cpu_search_lowest+0x1b5/frame 0xfffffe0036359150
> cpu_search_lowest() at cpu_search_lowest+0x35e/frame 0xfffffe00363592d0
> sched_lowest() at sched_lowest+0x66/frame 0xfffffe0036359340
> sched_pickcpu() at sched_pickcpu+0x5af/frame 0xfffffe0036359470
> sched_add() at sched_add+0x111/frame 0xfffffe00363594e0
> sched_wakeup() at sched_wakeup+0x10a/frame 0xfffffe0036359530
> setrunnable() at setrunnable+0x1c8/frame 0xfffffe0036359580
> sleepq_resume_thread() at sleepq_resume_thread+0x634/frame
> 0xfffffe0036359600
> sleepq_remove_matching() at sleepq_remove_matching+0xa9/frame
> 0xfffffe0036359660
> sleepq_broadcast() at sleepq_broadcast+0x142/frame 0xfffffe00363596a0
> wakeup() at wakeup+0x29/frame 0xfffffe00363596d0
> g_io_request() at g_io_request+0x739/frame 0xfffffe0036359750
> vdev_geom_io_start() at vdev_geom_io_start+0x582/frame 0xfffffe0036359800
> zio_vdev_io_start() at zio_vdev_io_start+0x962/frame 0xfffffe0036359950
> zio_execute() at zio_execute+0x28a/frame 0xfffffe00363599b0
> zio_nowait() at zio_nowait+0x129/frame 0xfffffe0036359a00
> vdev_cache_read() at vdev_cache_read+0x47c/frame 0xfffffe0036359b20
> zio_vdev_io_start() at zio_vdev_io_start+0x82a/frame 0xfffffe0036359c70
> zio_execute() at zio_execute+0x28a/frame 0xfffffe0036359cd0
> zio_nowait() at zio_nowait+0x129/frame 0xfffffe0036359d20
> vdev_mirror_io_start() at vdev_mirror_io_start+0x28a/frame
> 0xfffffe0036359dc0
> zio_vdev_io_start() at zio_vdev_io_start+0x11f/frame 0xfffffe0036359f10
> zio_execute() at zio_execute+0x28a/frame 0xfffffe0036359f70
> zio_nowait() at zio_nowait+0x129/frame 0xfffffe0036359fc0
> arc_read() at arc_read+0x1e8f/frame 0xfffffe003635a380
> traverse_prefetch_metadata() at traverse_prefetch_metadata+0x21b/frame
> 0xfffffe003635a3f0
> traverse_visitbp() at traverse_visitbp+0x831/frame 0xfffffe003635a600
> traverse_visitbp() at traverse_visitbp+0x8d6/frame 0xfffffe003635a810
> traverse_visitbp() at traverse_visitbp+0x8d6/frame 0xfffffe003635aa20
> traverse_visitbp() at traverse_visitbp+0x8d6/frame 0xfffffe003635ac30
> traverse_visitbp() at traverse_visitbp+0x8d6/frame 0xfffffe003635ae40
> traverse_dnode() at traverse_dnode+0x176/frame 0xfffffe003635aee0
> traverse_visitbp() at traverse_visitbp+0xde8/frame 0xfffffe003635b0f0
> traverse_impl() at traverse_impl+0x73a/frame 0xfffffe003635b320
> traverse_dataset_resume() at traverse_dataset_resume+0x92/frame
> 0xfffffe003635b390
> traverse_dataset() at traverse_dataset+0x43/frame 0xfffffe003635b3d0
> traverse_pool() at traverse_pool+0x1da/frame 0xfffffe003635b4d0
> spa_load_verify() at spa_load_verify+0x15e/frame 0xfffffe003635b580
> spa_load_impl() at spa_load_impl+0x2241/frame 0xfffffe003635ba30
> spa_load() at spa_load+0x301/frame 0xfffffe003635baf0
> spa_load_impl() at spa_load_impl+0x1445/frame 0xfffffe003635bfa0
> spa_load() at spa_load+0x301/frame 0xfffffe003635c060
> spa_load_best() at spa_load_best+0xbd/frame 0xfffffe003635c100
> spa_open_common() at spa_open_common+0x228/frame 0xfffffe003635c1f0
> spa_open() at spa_open+0x35/frame 0xfffffe003635c220
> pool_status_check() at pool_status_check+0x8e/frame 0xfffffe003635c280
> zfsdev_ioctl() at zfsdev_ioctl+0xb9d/frame 0xfffffe003635c540
> devfs_ioctl() at devfs_ioctl+0x187/frame 0xfffffe003635c5e0
> VOP_IOCTL_APV() at VOP_IOCTL_APV+0x227/frame 0xfffffe003635c660
> VOP_IOCTL() at VOP_IOCTL+0x6e/frame 0xfffffe003635c6e0
> vn_ioctl() at vn_ioctl+0x1cc/frame 0xfffffe003635c820
> devfs_ioctl_f() at devfs_ioctl_f+0x62/frame 0xfffffe003635c870
> fo_ioctl() at fo_ioctl+0x4c/frame 0xfffffe003635c8b0
> kern_ioctl() at kern_ioctl+0x361/frame 0xfffffe003635c980
> sys_ioctl() at sys_ioctl+0x2af/frame 0xfffffe003635ca60
> syscallenter() at syscallenter+0x4e4/frame 0xfffffe003635cb30
> amd64_syscall() at amd64_syscall+0x1b/frame 0xfffffe003635cbf0
> Xfast_syscall() at Xfast_syscall+0xfb/frame 0xfffffe003635cbf0
> --- syscall (54, FreeBSD ELF64, sys_ioctl), rip = 0x80143b5aa, rsp =
> 0x7fffffffcf78, rbp = 0x7fffffffcff0 ---
> KDB: enter: panic
> [ thread pid 44 tid 100102 ]
> Stopped at breakpoint+0x5: popq %rbp
> db>
Looks like a kernel stack overflow. That's a pretty deep call stack.
Try setting kern.kstack_pages to a larger value (> 4) in the loader.
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