Hi, it said: [other boot messages elided] [ 1.0000030] fdc0 at isa0 port 0x3f0-0x3f7 irq 6 drq 2 [ 1.0000030] uvm_fault(0xffffffff80d12860, 0x0, 1) -> e [ 1.0000030] fatal page fault in supervisor mode [ 1.0000030] trap type 6 code 0 rip 0xffffffff8021d6f8 cs 0xe030 rflags 0x10286 cr2 0x10 ilevel 0x8 rsp 0xffffffff810722c0 [ 1.0000030] curlwp 0xffffffff80b47a80 pid 0.0 lowest kstack 0xffffffff8106e2c0 kernel: page fault trap, code=0 Stopped in pid 0.0 (system) at netbsd:bus_dmamap_create+0x1a: testb $0x1,10( %rdi) bus_dmamap_create() at netbsd:bus_dmamap_create+0x1a _isa_dmamap_create() at netbsd:_isa_dmamap_create+0x4b fdcattach() at netbsd:fdcattach+0xb2 fdc_isa_attach() at netbsd:fdc_isa_attach+0xfe config_attach_internal() at netbsd:config_attach_internal+0x197 config_attach() at netbsd:config_attach+0x49 isasearch() at netbsd:isasearch+0x1ee mapply() at netbsd:mapply+0x23 config_search_internal() at netbsd:config_search_internal+0x179 config_search() at netbsd:config_search+0x7d isarescan() at netbsd:isarescan+0xb4 isaattach() at netbsd:isaattach+0xad config_attach_internal() at netbsd:config_attach_internal+0x197 config_found() at netbsd:config_found+0xc1 pcibrescan() at netbsd:pcibrescan+0xc1 pcib_callback() at netbsd:pcib_callback+0x12 config_process_deferred() at netbsd:config_process_deferred+0xbc config_attach_internal() at netbsd:config_attach_internal+0x225 config_found() at netbsd:config_found+0xc1 mp_pci_scan() at netbsd:mp_pci_scan+0xd6 hypervisor_attach() at netbsd:hypervisor_attach+0x56c config_attach_internal() at netbsd:config_attach_internal+0x197 config_found() at netbsd:config_found+0xc1 xen_mainbus_attach() at netbsd:xen_mainbus_attach+0x9c mainbus_attach() at netbsd:mainbus_attach+0x4a config_attach_internal() at netbsd:config_attach_internal+0x197 config_rootfound() at netbsd:config_rootfound+0x77 cpu_configure() at netbsd:cpu_configure+0x25 main() at netbsd:main+0x32c ds 0 es 2a40 fs 6970 gs 6f69 rdi 0 rsi 0 rbp ffffffff81072330 rbx 0 rdx 1 rcx 0 rax ffffffff80c81be0 x86_isa_chipset+0x40 r8 0 r9 3 r10 0 r11 ffffffff80b00394 cpu_info_primary+0x694 r12 0 r13 ffffb680025ad940 r14 3 r15 ffffffff80b559c0 cfdata+0x3720 rip ffffffff8021d6f8 bus_dmamap_create+0x1a cs e030 rflags 10286 rsp ffffffff810722c0 ss e02b netbsd:bus_dmamap_create+0x1a: testb $0x1,10(%rdi)
This specific boot is with a 4.15 xenkernel but it showed the same behaviour with a 4.8 xenkernel. regards, spz