Hi,
i've been having kvm VMs running 6.2 hardlocking/deadlocking since a
while, all those running on proxmox 5.1 using linux 4.13.8 & qemu-kvm
2.9.1. There were hardlocks upon reboot which were 'solved' by disabling
x2apic emulation in kvm (args: -cpu=kvm64,-x2apic) or giving the host
cpu flags to the vm (args: -cpu host) but there still remains deadlocks
during normal operation.
I'm now running a kernel with MP_LOCKDEBUG, so i'm collecting traces in
the vain hope that it might help someone interested in locking issues.
Here's the latest one:
login: __mp_lock(0xffffffff81b23ed0): lock spun outStopped at db_enter+0x5:
popq %rbp
ddb{2}> trace
db_enter() at db_enter+0x5
___mp_lock(40) at ___mp_lock+0x66
syscall() at syscall+0x1ff
--- syscall (number 4) ---
end of kernel
end trace frame: 0xb3b20d05fe0, count: -3
0xb3ba081bbfa:
ddb{2}> mach ddbcpu 1
Stopped at x86_ipi_db+0x5: popq %rbp
ddb{1}> tr
x86_ipi_db(ffff800022136530) at x86_ipi_db+0x5
x86_ipi_handler() at x86_ipi_handler+0x6b
Xresume_lapic_ipi() at Xresume_lapic_ipi+0x1f
--- interrupt ---
Bad frame pointer: 0xfffffe4fe85250cc
end trace frame: 0xfffffe4fe85250cc, count: -3
0x41cb8c419c524153:
ddb{1}> ps /o
TID PID UID PRFLAGS PFLAGS CPU COMMAND
216909 39313 726 0 0x4000000 2 rrdcached
*366090 74010 0 0x14000 0x200 1 systq
ddb{1}> tr /p 0t366090
lapic_delay(ffffffff81a97c88) at lapic_delay+0x5c
rtcget(ffffffff81a97c88) at rtcget+0x1a
resettodr() at resettodr+0x3a
perform_resettodr(ffffffff8150a7d9) at perform_resettodr+0x9
taskq_thread(0) at taskq_thread+0x67
end trace frame: 0x0, count: -5
ddb{1}> tr /p 0t216909
uvm_fault(0xffffffff81b526f8, 0x0, 0, 1) -> e
kernel: double fault trap, code=0
Faulted in DDB; continuing...
if i continue at that point or try bo sync, ddb is kaput and i can only stop
the vm. Of course an option would be to run bsd.sp, but that's a bit .. sad.
dmesg attached.
Landry
OpenBSD 6.2-stable (GENERIC.MP) #0: Fri Dec 1 11:27:09 CET 2017
[email protected]:/usr/src/sys/arch/amd64/compile/GENERIC.MP
real mem = 17162944512 (16367MB)
avail mem = 16635760640 (15865MB)
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.8 @ 0xf68d0 (10 entries)
bios0: vendor SeaBIOS version "rel-1.10.2-0-g5f4c7b1-prebuilt.qemu-project.org"
date 04/01/2014
bios0: QEMU Standard PC (i440FX + PIIX, 1996)
acpi0 at bios0: rev 0
acpi0: sleep states S3 S4 S5
acpi0: tables DSDT FACP APIC HPET
acpi0: wakeup devices
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Intel(R) Xeon(R) CPU E5-2603 v4 @ 1.70GHz, 286.92 MHz
cpu0:
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,SS,HTT,SSE3,PCLMUL,SSSE3,FMA3,CX16,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,HV,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,FSGSBASE,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM,RDSEED,ADX,SMAP,ARAT
cpu0: 64KB 64b/line 2-way I-cache, 64KB 64b/line 2-way D-cache, 512KB 64b/line
16-way L2 cache
cpu0: ITLB 255 4KB entries direct-mapped, 255 4MB entries direct-mapped
cpu0: DTLB 255 4KB entries direct-mapped, 255 4MB entries direct-mapped
cpu0: smt 0, core 0, package 0
mtrr: Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges
cpu0: apic clock running at 999MHz
cpu1 at mainbus0: apid 1 (application processor)
cpu1: Intel(R) Xeon(R) CPU E5-2603 v4 @ 1.70GHz, 472.57 MHz
cpu1:
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,SS,HTT,SSE3,PCLMUL,SSSE3,FMA3,CX16,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,HV,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,FSGSBASE,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM,RDSEED,ADX,SMAP,ARAT
cpu1: 64KB 64b/line 2-way I-cache, 64KB 64b/line 2-way D-cache, 512KB 64b/line
16-way L2 cache
cpu1: ITLB 255 4KB entries direct-mapped, 255 4MB entries direct-mapped
cpu1: DTLB 255 4KB entries direct-mapped, 255 4MB entries direct-mapped
cpu1: smt 0, core 1, package 0
cpu2 at mainbus0: apid 2 (application processor)
cpu2: Intel(R) Xeon(R) CPU E5-2603 v4 @ 1.70GHz, 465.40 MHz
cpu2:
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,SS,HTT,SSE3,PCLMUL,SSSE3,FMA3,CX16,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,HV,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,FSGSBASE,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM,RDSEED,ADX,SMAP,ARAT
cpu2: 64KB 64b/line 2-way I-cache, 64KB 64b/line 2-way D-cache, 512KB 64b/line
16-way L2 cache
cpu2: ITLB 255 4KB entries direct-mapped, 255 4MB entries direct-mapped
cpu2: DTLB 255 4KB entries direct-mapped, 255 4MB entries direct-mapped
cpu2: smt 0, core 2, package 0
cpu3 at mainbus0: apid 3 (application processor)
cpu3: Intel(R) Xeon(R) CPU E5-2603 v4 @ 1.70GHz, 467.31 MHz
cpu3:
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,SS,HTT,SSE3,PCLMUL,SSSE3,FMA3,CX16,PCID,SSE4.1,SSE4.2,x2APIC,MOVBE,POPCNT,DEADLINE,AES,XSAVE,AVX,F16C,RDRAND,HV,NXE,PAGE1GB,RDTSCP,LONG,LAHF,ABM,3DNOWP,PERF,FSGSBASE,BMI1,HLE,AVX2,SMEP,BMI2,ERMS,INVPCID,RTM,RDSEED,ADX,SMAP,ARAT
cpu3: 64KB 64b/line 2-way I-cache, 64KB 64b/line 2-way D-cache, 512KB 64b/line
16-way L2 cache
cpu3: ITLB 255 4KB entries direct-mapped, 255 4MB entries direct-mapped
cpu3: DTLB 255 4KB entries direct-mapped, 255 4MB entries direct-mapped
cpu3: smt 0, core 3, package 0
ioapic0 at mainbus0: apid 0 pa 0xfec00000, version 11, 24 pins
acpihpet0 at acpi0: 100000000 Hz
acpiprt0 at acpi0: bus 0 (PCI0)
acpicpu0 at acpi0: C1(@1 halt!)
acpicpu1 at acpi0: C1(@1 halt!)
acpicpu2 at acpi0: C1(@1 halt!)
acpicpu3 at acpi0: C1(@1 halt!)
"ACPI0006" at acpi0 not configured
"PNP0F13" at acpi0 not configured
"PNP0700" at acpi0 not configured
"PNP0A06" at acpi0 not configured
"PNP0A06" at acpi0 not configured
"PNP0A06" at acpi0 not configured
"QEMU0002" at acpi0 not configured
"ACPI0010" at acpi0 not configured
pvbus0 at mainbus0: KVM
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "Intel 82441FX" rev 0x02
pcib0 at pci0 dev 1 function 0 "Intel 82371SB ISA" rev 0x00
pciide0 at pci0 dev 1 function 1 "Intel 82371SB IDE" rev 0x00: DMA, channel 0
wired to compatibility, channel 1 wired to compatibility
pciide0: channel 0 disabled (no drives)
pciide0: channel 1 disabled (no drives)
uhci0 at pci0 dev 1 function 2 "Intel 82371SB USB" rev 0x01: apic 0 int 11
piixpm0 at pci0 dev 1 function 3 "Intel 82371AB Power" rev 0x03: apic 0 int 9
iic0 at piixpm0
vga1 at pci0 dev 2 function 0 "Bochs VGA" rev 0x02
wsdisplay0 at vga1 mux 1: console (80x25, vt100 emulation)
wsdisplay0: screen 1-5 added (80x25, vt100 emulation)
virtio0 at pci0 dev 3 function 0 "Qumranet Virtio Memory" rev 0x00
viomb0 at virtio0
virtio0: apic 0 int 11
virtio1 at pci0 dev 10 function 0 "Qumranet Virtio Storage" rev 0x00
vioblk0 at virtio1
scsibus1 at vioblk0: 2 targets
sd0 at scsibus1 targ 0 lun 0: <VirtIO, Block Device, > SCSI3 0/direct fixed
sd0: 153600MB, 512 bytes/sector, 314572800 sectors
virtio1: msix shared
virtio2 at pci0 dev 18 function 0 "Qumranet Virtio Network" rev 0x00
vio0 at virtio2: address 46:ae:54:5a:0d:80
virtio2: msix shared
ppb0 at pci0 dev 30 function 0 "Red Hat Qemu PCI-PCI" rev 0x00
pci1 at ppb0 bus 1
ppb1 at pci0 dev 31 function 0 "Red Hat Qemu PCI-PCI" rev 0x00
pci2 at ppb1 bus 2
isa0 at pcib0
isadma0 at isa0
fdc0 at isa0 port 0x3f0/6 irq 6 drq 2
com0 at isa0 port 0x3f8/8 irq 4: ns16550a, 16 byte fifo
com0: console
pckbc0 at isa0 port 0x60/5 irq 1 irq 12
pckbd0 at pckbc0 (kbd slot)
wskbd0 at pckbd0: console keyboard, using wsdisplay0
pms0 at pckbc0 (aux slot)
wsmouse0 at pms0 mux 0
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
usb0 at uhci0: USB revision 1.0
uhub0 at usb0 configuration 1 interface 0 "Intel UHCI root hub" rev 1.00/1.00
addr 1
uhidev0 at uhub0 port 1 configuration 1 interface 0 "QEMU QEMU USB Tablet" rev
2.00/0.00 addr 2
uhidev0: iclass 3/0
ums0 at uhidev0: 3 buttons, Z dir
wsmouse1 at ums0 mux 0
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
root on sd0a (0a797a44a76827db.a) swap on sd0b dump on sd0b
fd0 at fdc0 drive 1: density unknown
