Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address = 0x40
fault code = supervisor read data, page not present
instruction pointer = 0x20:0xffffffff8260f700
stack pointer = 0x0:0xfffffe0466418580
frame pointer = 0x0:0xfffffe04664185b0
code segment = base 0x0, limit 0xfffff, type 0x1b
= DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags = interrupt enabled, resume, IOPL = 0
current process = 1895 (Compositor)
trap number = 12
panic: page fault
cpuid = 0
KDB: stack backtrace:
#0 0xffffffff80aadac7 at kdb_backtrace+0x67
#1 0xffffffff80a6bba6 at vpanic+0x186
#2 0xffffffff80a6ba13 at panic+0x43
#3 0xffffffff80edf832 at trap_fatal+0x322
#4 0xffffffff80edf889 at trap_pfault+0x49
#5 0xffffffff80edf0c6 at trap+0x286
#6 0xffffffff80ec36d1 at calltrap+0x8
#7 0xffffffff824f4aff at i915_gem_evict_something+0x9f <-----------
#8 0xffffffff824f0f5f at i915_gem_object_pin+0x37f
#9 0xffffffff824eeac9 at i915_gem_pager_populate+0x1a9
#10 0xffffffff80d57c99 at vm_fault_hold+0x1179
#11 0xffffffff80d56ad5 at vm_fault+0x75
#12 0xffffffff80edf927 at trap_pfault+0xe7
#13 0xffffffff80edf170 at trap+0x330
#14 0xffffffff80ec36d1 at calltrap+0x8
Uptime: 10m22s
Dumping 1205 out of 16271 MB:..2%..11%..22%..31%..42%..51%..62%..71%..81%..91%
<loading symbols - stripped>
#0 doadump (textdump=<value optimized out>) at pcpu.h:222
in pcpu.h
222 pcpu.h: No such file or directory.
(kgdb)