Ingo Feinerer <feine...@logic.at> wrote:

> with
> 
> $ sysctl kern.version
> kern.version=OpenBSD 6.3-current (GENERIC.MP) #88: Wed Jun  6 20:07:00 MDT 
> 2018
>     dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP
> 
> I observe following messages
(…)

Not exactly the same message but also somewhat i915 related with a snapshot
one day older than yours :

sysctl kern.version
kern.version=OpenBSD 6.3-current (GENERIC.MP) #84: Tue Jun  5 19:22:09 MDT 2018
    dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP

lock order reversal:
 1st 0xffffffff81da5108 &sched_lock (&sched_lock) @ 
/usr/src/sys/kern/kern_synch.c:444
 2nd 0xffff8000000ff9f0 &dev_priv->uncore.lock (&dev_priv->uncore.lock) @ 
/usr/src/sys/dev/pci/drm/i915/intel_uncore.c:811
lock order "&dev_priv->uncore.lock"(mutex) -> "&sched_lock"(sched_lock) first 
seen at:
#0  witness_checkorder+0x4b4
#1  ___mp_lock+0x70
#2  schedclock+0x30
#3  hardclock+0xe3
#4  lapic_clockintr+0x3d
#5  Xresume_lapic_ltimer+0x22
#6  gen6_write32+0x120
#7  ironlake_irq_handler+0x7e
#8  intr_handler+0x74
#9  Xintr_ioapic_edge16_untramp+0x13d
#10 acpicpu_idle+0x166
#11 cpu_idle_cycle+0x10
lock order "&sched_lock"(sched_lock) -> "&dev_priv->uncore.lock"(mutex) first 
seen at:
#0  witness_checkorder+0x4b4
#1  _mtx_enter+0x31
#2  gen6_read32+0x8f
#3  gen6_ring_get_seqno+0x3a
#4  __i915_wait_request+0x232
#5  i915_gem_object_wait_rendering__nonblocking+0x1d6
#6  i915_gem_set_domain_ioctl+0xdb
#7  drm_do_ioctl+0x221
#8  drmioctl+0xf9
#9  VOP_IOCTL+0x5a
#10 vn_ioctl+0x6b
#11 sys_ioctl+0x457
#12 syscall+0x32a
#13 Xsyscall_untramp+0xc0
lock order reversal:
 1st 0xffffffff81da5108 &sched_lock (&sched_lock) @ 
/usr/src/sys/kern/kern_synch.c:444
 2nd 0xffff800000106270 &dev_priv->irq_lock (&dev_priv->irq_lock) @ 
/usr/src/sys/dev/pci/drm/i915/intel_ringbuffer.c:1787
lock order "&dev_priv->irq_lock"(mutex) -> "&sched_lock"(sched_lock) first seen 
at:
#0  witness_checkorder+0x4b4
#1  ___mp_lock+0x70
#2  wakeup_n+0x39
#3  task_add+0x93
#4  gen6_rps_boost+0x129
#5  __i915_wait_request+0x155
#6  i915_gem_object_wait_rendering__nonblocking+0x1d6
#7  i915_gem_set_domain_ioctl+0xdb
#8  drm_do_ioctl+0x221
#9  drmioctl+0xf9
#10 VOP_IOCTL+0x5a
#11 vn_ioctl+0x6b
#12 sys_ioctl+0x457
#13 syscall+0x32a
#14 Xsyscall_untramp+0xc0
lock order "&sched_lock"(sched_lock) -> "&dev_priv->irq_lock"(mutex) first seen 
at:
#0  witness_checkorder+0x4b4
#1  _mtx_enter+0x31
#2  gen6_ring_put_irq+0x36
#3  __i915_wait_request+0x367
#4  i915_gem_object_wait_rendering__nonblocking+0x1d6
#5  i915_gem_set_domain_ioctl+0xdb
#6  drm_do_ioctl+0x221
#7  drmioctl+0xf9
#8  VOP_IOCTL+0x5a
#9  vn_ioctl+0x6b
#10 sys_ioctl+0x457
#11 syscall+0x32a
#12 Xsyscall_untramp+0xc0

on

OpenBSD 6.3-current (GENERIC.MP) #84: Tue Jun  5 19:22:09 MDT 2018
    dera...@amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP
real mem = 8451125248 (8059MB)
avail mem = 8117297152 (7741MB)
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.6 @ 0xdae9c000 (64 entries)
bios0: vendor LENOVO version "8DET70WW (1.40 )" date 05/14/2015
bios0: LENOVO 42919Y5
acpi0 at bios0: rev 2
acpi0: sleep states S0 S3 S4 S5
acpi0: tables DSDT FACP SLIC SSDT SSDT SSDT HPET APIC MCFG ECDT ASF! TCPA SSDT 
SSDT DMAR UEFI UEFI UEFI
acpi0: wakeup devices LID_(S3) SLPB(S3) IGBE(S4) EXP4(S4) EXP7(S4) EHC1(S3) 
EHC2(S3) HDEF(S4)
acpitimer0 at acpi0: 3579545 Hz, 24 bits
acpihpet0 at acpi0: 14318179 Hz
acpimadt0 at acpi0 addr 0xfee00000: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz, 797.55 MHz
cpu0: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,RDTSCP,LONG,LAHF,PERF,ITSC,IBRS,IBPB,STIBP,SENSOR,ARAT,MELTDOWN
cpu0: 256KB 64b/line 8-way L2 cache
cpu0: smt 0, core 0, package 0
mtrr: Pentium Pro MTRR support, 10 var ranges, 88 fixed ranges
using xsaveopt
cpu0: apic clock running at 99MHz
cpu0: mwait min=64, max=64, C-substates=0.2.1.1.2, IBE
cpu1 at mainbus0: apid 1 (application processor)
cpu1: Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz, 797.42 MHz
cpu1: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,RDTSCP,LONG,LAHF,PERF,ITSC,IBRS,IBPB,STIBP,SENSOR,ARAT,MELTDOWN
cpu1: 256KB 64b/line 8-way L2 cache
cpu1: smt 1, core 0, package 0
cpu2 at mainbus0: apid 2 (application processor)
cpu2: Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz, 797.42 MHz
cpu2: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,RDTSCP,LONG,LAHF,PERF,ITSC,IBRS,IBPB,STIBP,SENSOR,ARAT,MELTDOWN
cpu2: 256KB 64b/line 8-way L2 cache
cpu2: smt 0, core 1, package 0
cpu3 at mainbus0: apid 3 (application processor)
cpu3: Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz, 797.42 MHz
cpu3: 
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,DS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE,SSE3,PCLMUL,DTES64,MWAIT,DS-CPL,VMX,SMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,x2APIC,POPCNT,DEADLINE,AES,XSAVE,AVX,NXE,RDTSCP,LONG,LAHF,PERF,ITSC,IBRS,IBPB,STIBP,SENSOR,ARAT,MELTDOWN
cpu3: 256KB 64b/line 8-way L2 cache
cpu3: smt 1, core 1, package 0
ioapic0 at mainbus0: apid 2 pa 0xfec00000, version 20, 24 pins
acpimcfg0 at acpi0 addr 0xf8000000, bus 0-63
acpiec0 at acpi0
acpiprt0 at acpi0: bus 0 (PCI0)
acpiprt1 at acpi0: bus -1 (PEG_)
acpiprt2 at acpi0: bus 2 (EXP1)
acpiprt3 at acpi0: bus 3 (EXP2)
acpiprt4 at acpi0: bus 5 (EXP4)
acpiprt5 at acpi0: bus 13 (EXP5)
acpiprt6 at acpi0: bus -1 (EXP7)
acpicpu0 at acpi0: C3(200@109 io@0x416), C2(500@80 io@0x414), C1(1000@1 halt), 
PSS
acpicpu1 at acpi0: C3(200@109 io@0x416), C2(500@80 io@0x414), C1(1000@1 halt), 
PSS
acpicpu2 at acpi0: C3(200@109 io@0x416), C2(500@80 io@0x414), C1(1000@1 halt), 
PSS
acpicpu3 at acpi0: C3(200@109 io@0x416), C2(500@80 io@0x414), C1(1000@1 halt), 
PSS
acpipwrres0 at acpi0: PUBS, resource for EHC1, EHC2
acpitz0 at acpi0: critical temperature is 99 degC
acpibtn0 at acpi0: LID_
acpibtn1 at acpi0: SLPB
acpicmos0 at acpi0
"LEN0020" at acpi0 not configured
"SMO1200" at acpi0 not configured
acpibat0 at acpi0: BAT0 model "42T4942" serial   222 type LION oem "LGC"
acpiac0 at acpi0: AC unit offline
acpithinkpad0 at acpi0
"PNP0C14" at acpi0 not configured
"PNP0C14" at acpi0 not configured
acpidock0 at acpi0: GDCK not docked (0)
acpivideo0 at acpi0: VID_
acpivout at acpivideo0 not configured
acpivideo1 at acpi0: VID_
cpu0: Enhanced SpeedStep 797 MHz: speeds: 2501, 2500, 2200, 2000, 1800, 1600, 
1400, 1200, 1000, 800 MHz
pci0 at mainbus0 bus 0
pchb0 at pci0 dev 0 function 0 "Intel Core 2G Host" rev 0x09
inteldrm0 at pci0 dev 2 function 0 "Intel HD Graphics 3000" rev 0x09
drm0 at inteldrm0
inteldrm0: msi
inteldrm0: 1366x768, 32bpp
wsdisplay0 at inteldrm0 mux 1: console (std, vt100 emulation)
wsdisplay0: screen 1-5 added (std, vt100 emulation)
"Intel 6 Series MEI" rev 0x04 at pci0 dev 22 function 0 not configured
puc0 at pci0 dev 22 function 3 "Intel 6 Series KT" rev 0x04: ports: 16 com
com4 at puc0 port 0 apic 2 int 19: ns16550a, 16 byte fifo
com4: probed fifo depth: 0 bytes
em0 at pci0 dev 25 function 0 "Intel 82579LM" rev 0x04: msi, address 
f0:de:f1:b9:60:45
ehci0 at pci0 dev 26 function 0 "Intel 6 Series USB" rev 0x04: apic 2 int 16
usb0 at ehci0: USB revision 2.0
uhub0 at usb0 configuration 1 interface 0 "Intel EHCI root hub" rev 2.00/1.00 
addr 1
azalia0 at pci0 dev 27 function 0 "Intel 6 Series HD Audio" rev 0x04: msi
azalia0: codecs: Conexant CX20590, Intel/0x2805, using Conexant CX20590
audio0 at azalia0
ppb0 at pci0 dev 28 function 0 "Intel 6 Series PCIE" rev 0xb4: msi
pci1 at ppb0 bus 2
ppb1 at pci0 dev 28 function 1 "Intel 6 Series PCIE" rev 0xb4: msi
pci2 at ppb1 bus 3
iwn0 at pci2 dev 0 function 0 "Intel Centrino Advanced-N 6205" rev 0x34: msi, 
MIMO 2T2R, MoW, address 10:0b:a9:38:4a:7c
ppb2 at pci0 dev 28 function 3 "Intel 6 Series PCIE" rev 0xb4: msi
pci3 at ppb2 bus 5
ppb3 at pci0 dev 28 function 4 "Intel 6 Series PCIE" rev 0xb4: msi
pci4 at ppb3 bus 13
sdhc0 at pci4 dev 0 function 0 "Ricoh 5U823 SD/MMC" rev 0x04: apic 2 int 16
sdhc0: SDHC 3.0, 50 MHz base clock
sdmmc0 at sdhc0: 4-bit, sd high-speed, mmc high-speed, dma
ehci1 at pci0 dev 29 function 0 "Intel 6 Series USB" rev 0x04: apic 2 int 23
usb1 at ehci1: USB revision 2.0
uhub1 at usb1 configuration 1 interface 0 "Intel EHCI root hub" rev 2.00/1.00 
addr 1
pcib0 at pci0 dev 31 function 0 "Intel QM67 LPC" rev 0x04
ahci0 at pci0 dev 31 function 2 "Intel 6 Series AHCI" rev 0x04: msi, AHCI 1.3
ahci0: port 0: 6.0Gb/s
scsibus1 at ahci0: 32 targets
sd0 at scsibus1 targ 0 lun 0: <ATA, KINGSTON SV300S3, 521A> SCSI3 0/direct 
fixed naa.50026b723c063525
sd0: 114473MB, 512 bytes/sector, 234441648 sectors, thin
ichiic0 at pci0 dev 31 function 3 "Intel 6 Series SMBus" rev 0x04: apic 2 int 18
iic0 at ichiic0
spdmem0 at iic0 addr 0x50: 4GB DDR3 SDRAM PC3-8500 SO-DIMM
spdmem1 at iic0 addr 0x51: 4GB DDR3 SDRAM PC3-8500 SO-DIMM
isa0 at pcib0
isadma0 at isa0
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
wsmouse1 at pms0 mux 0
pms0: Synaptics clickpad, firmware 8.1, 0x1e2b1 0x940300
pcppi0 at isa0 port 0x61
spkr0 at pcppi0
aps0 at isa0 port 0x1600/31
vmm0 at mainbus0: VMX/EPT
uhub2 at uhub0 port 1 configuration 1 interface 0 "Intel Rate Matching Hub" rev 
2.00/0.00 addr 2
urndis0 at uhub2 port 2 configuration 1 interface 0 "HUAWEI PRA-LX1" rev 
2.00/2.99 addr 3
urndis0: using RNDIS, address 26:36:49:69:d1:2b
ugen0 at uhub2 port 2 configuration 1 "HUAWEI PRA-LX1" rev 2.00/2.99 addr 3
uhub3 at uhub1 port 1 configuration 1 interface 0 "Intel Rate Matching Hub" rev 
2.00/0.00 addr 2
vscsi0 at root
scsibus2 at vscsi0: 256 targets
softraid0 at root
scsibus3 at softraid0: 256 targets
root on sd0a (885dba0cd34ca558.a) swap on sd0b dump on sd0b
lock order reversal:
 1st 0xffffffff81da5108 &sched_lock (&sched_lock) @ 
/usr/src/sys/kern/kern_synch.c:444
 2nd 0xffff8000000ff9f0 &dev_priv->uncore.lock (&dev_priv->uncore.lock) @ 
/usr/src/sys/dev/pci/drm/i915/intel_uncore.c:811
lock order "&dev_priv->uncore.lock"(mutex) -> "&sched_lock"(sched_lock) first 
seen at:
#0  witness_checkorder+0x4b4
#1  ___mp_lock+0x70
#2  schedclock+0x30
#3  hardclock+0xe3
#4  lapic_clockintr+0x3d
#5  Xresume_lapic_ltimer+0x22
#6  gen6_write32+0x120
#7  ironlake_irq_handler+0x7e
#8  intr_handler+0x74
#9  Xintr_ioapic_edge16_untramp+0x13d
#10 acpicpu_idle+0x166
#11 cpu_idle_cycle+0x10
lock order "&sched_lock"(sched_lock) -> "&dev_priv->uncore.lock"(mutex) first 
seen at:
#0  witness_checkorder+0x4b4
#1  _mtx_enter+0x31
#2  gen6_read32+0x8f
#3  gen6_ring_get_seqno+0x3a
#4  __i915_wait_request+0x232
#5  i915_gem_object_wait_rendering__nonblocking+0x1d6
#6  i915_gem_set_domain_ioctl+0xdb
#7  drm_do_ioctl+0x221
#8  drmioctl+0xf9
#9  VOP_IOCTL+0x5a
#10 vn_ioctl+0x6b
#11 sys_ioctl+0x457
#12 syscall+0x32a
#13 Xsyscall_untramp+0xc0
lock order reversal:
 1st 0xffffffff81da5108 &sched_lock (&sched_lock) @ 
/usr/src/sys/kern/kern_synch.c:444
 2nd 0xffff800000106270 &dev_priv->irq_lock (&dev_priv->irq_lock) @ 
/usr/src/sys/dev/pci/drm/i915/intel_ringbuffer.c:1787
lock order "&dev_priv->irq_lock"(mutex) -> "&sched_lock"(sched_lock) first seen 
at:
#0  witness_checkorder+0x4b4
#1  ___mp_lock+0x70
#2  wakeup_n+0x39
#3  task_add+0x93
#4  gen6_rps_boost+0x129
#5  __i915_wait_request+0x155
#6  i915_gem_object_wait_rendering__nonblocking+0x1d6
#7  i915_gem_set_domain_ioctl+0xdb
#8  drm_do_ioctl+0x221
#9  drmioctl+0xf9
#10 VOP_IOCTL+0x5a
#11 vn_ioctl+0x6b
#12 sys_ioctl+0x457
#13 syscall+0x32a
#14 Xsyscall_untramp+0xc0
lock order "&sched_lock"(sched_lock) -> "&dev_priv->irq_lock"(mutex) first seen 
at:
#0  witness_checkorder+0x4b4
#1  _mtx_enter+0x31
#2  gen6_ring_put_irq+0x36
#3  __i915_wait_request+0x367
#4  i915_gem_object_wait_rendering__nonblocking+0x1d6
#5  i915_gem_set_domain_ioctl+0xdb
#6  drm_do_ioctl+0x221
#7  drmioctl+0xf9
#8  VOP_IOCTL+0x5a
#9  vn_ioctl+0x6b
#10 sys_ioctl+0x457
#11 syscall+0x32a
#12 Xsyscall_untramp+0xc0
urndis0 detached
ugen0 detached
uhub2 detached
uhub0 detached
uhub3 detached
uhub1 detached
uhub0 at usb0 configuration 1 interface 0 "Intel EHCI root hub" rev 2.00/1.00 
addr 1
uhub1 at usb1 configuration 1 interface 0 "Intel EHCI root hub" rev 2.00/1.00 
addr 1
uhub2 at uhub0 port 1 configuration 1 interface 0 "Intel Rate Matching Hub" rev 
2.00/0.00 addr 2
uhub3 at uhub1 port 1 configuration 1 interface 0 "Intel Rate Matching Hub" rev 
2.00/0.00 addr 2
uhub2 detached
uhub0 detached
uhub3 detached
uhub1 detached
uhub0 at usb0 configuration 1 interface 0 "Intel EHCI root hub" rev 2.00/1.00 
addr 1
uhub1 at usb1 configuration 1 interface 0 "Intel EHCI root hub" rev 2.00/1.00 
addr 1
uhub2 at uhub0 port 1 configuration 1 interface 0 "Intel Rate Matching Hub" rev 
2.00/0.00 addr 2
urndis0 at uhub2 port 2 configuration 1 interface 0 "HUAWEI PRA-LX1" rev 
2.00/2.99 addr 3
urndis0: using RNDIS, address 26:fe:e3:dc:32:a4
ugen0 at uhub2 port 2 configuration 1 "HUAWEI PRA-LX1" rev 2.00/2.99 addr 3
uhub3 at uhub1 port 1 configuration 1 interface 0 "Intel Rate Matching Hub" rev 
2.00/0.00 addr 2

The system is rocking as usual.

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