cause system crash

[emctoo]

Running on ix0 interface:

sudo bricks-duplicate ix0 4

Another terminal runs:

sudo ./pkt-gen -i netmap:ix0}3 -f rx

Well it works. But ctrl+c to kill pkt-gen process, system crashes.

Systme info,

uname -a
FreeBSD xd 10.2-RELEASE-p2 FreeBSD 10.2-RELEASE-p2 #0: Thu Sep 10 20:00:45 CST 2015     root@ix:/usr/obj/usr/src/sys/NETMAP  amd64

Crash info in /var/log/message:

Dec 17 16:36:35 xd kernel: ix0: permanently promiscuous mode enabled
Dec 17 16:36:48 xd kernel: 408.141691 [1233] netmap_mem_global_config  reconfiguring
Dec 17 16:38:10 xd kernel: 490.349551 [ 325] netmap_pipe_krings_create 0xfffff8000f90b400: case 1, create everything
Dec 17 16:38:10 xd kernel: 490.351018 [ 325] netmap_pipe_krings_create 0xfffff8000f850400: case 1, create everything
Dec 17 16:38:10 xd kernel: 490.352474 [ 325] netmap_pipe_krings_create 0xfffff8000f90bc00: case 1, create everything
Dec 17 16:38:10 xd kernel: 490.353934 [ 325] netmap_pipe_krings_create 0xfffff8000f90c400: case 1, create everything
Dec 17 16:43:19 xd syslogd: kernel boot file is /boot/kernel/kernel
Dec 17 16:43:19 xd kernel: 
Dec 17 16:43:19 xd kernel: 
Dec 17 16:43:19 xd kernel: Fatal trap 12: page fault while in kernel mode
Dec 17 16:43:19 xd kernel: cpuid = 7; apic id = 02
Dec 17 16:43:19 xd kernel: fault virtual address        = 0x0
Dec 17 16:43:19 xd kernel: fault code           = supervisor read instruction, page not present
Dec 17 16:43:19 xd kernel: instruction pointer  = 0x20:0x0
Dec 17 16:43:19 xd kernel: stack pointer                = 0x28:0xfffffe10483d0700
Dec 17 16:43:19 xd kernel: frame pointer                = 0x28:0xfffffe10483d0770
Dec 17 16:43:19 xd kernel: code segment         = base 0x0, limit 0xfffff, type 0x1b
Dec 17 16:43:19 xd kernel: = DPL 0, pres 1, long 1, def32 0, gran 1
Dec 17 16:43:19 xd kernel: processor eflags     = interrupt enabled, resume, IOPL = 0
Dec 17 16:43:19 xd kernel: current process              = 3267 (pkt-gen)
Dec 17 16:43:19 xd kernel: trap number          = 12
Dec 17 16:43:19 xd kernel: panic: page fault
Dec 17 16:43:19 xd kernel: cpuid = 0
Dec 17 16:43:19 xd kernel: KDB: stack backtrace:
Dec 17 16:43:19 xd kernel: #0 0xffffffff8099c650 at kdb_backtrace+0x60
Dec 17 16:43:19 xd kernel: #1 0xffffffff80960206 at vpanic+0x126
Dec 17 16:43:19 xd kernel: #2 0xffffffff809600d3 at panic+0x43
Dec 17 16:43:19 xd kernel: #3 0xffffffff80d622fb at trap_fatal+0x36b
Dec 17 16:43:19 xd kernel: #4 0xffffffff80d625fd at trap_pfault+0x2ed
Dec 17 16:43:19 xd kernel: #5 0xffffffff80d61c9a at trap+0x47a
Dec 17 16:43:19 xd kernel: #6 0xffffffff80d48012 at calltrap+0x8
Dec 17 16:43:19 xd kernel: #7 0xffffffff80680d15 at netmap_do_unregif+0xa5
Dec 17 16:43:19 xd kernel: #8 0xffffffff80680bce at netmap_dtor_locked+0x3e
Dec 17 16:43:19 xd kernel: #9 0xffffffff80680e2a at netmap_dtor+0x4a
Dec 17 16:43:19 xd kernel: #10 0xffffffff806859b3 at netmap_dev_pager_dtor+0x73
Dec 17 16:43:19 xd kernel: #11 0xffffffff80bce0f7 at dev_pager_dealloc+0x57
Dec 17 16:43:19 xd kernel: #12 0xffffffff80beb156 at vm_object_terminate+0x246
Dec 17 16:43:19 xd kernel: #13 0xffffffff80bea11e at vm_object_deallocate+0x1e
Dec 17 16:43:19 xd kernel: #14 0xffffffff80be084d at vm_map_process_deferred+0x5d
Dec 17 16:43:19 xd kernel: #15 0xffffffff80be8928 at sys_munmap+0x1a8
Dec 17 16:43:19 xd kernel: #16 0xffffffff80d62c17 at amd64_syscall+0x357
Dec 17 16:43:19 xd kernel: #17 0xffffffff80d482fb at Xfast_syscall+0xfb

[emctoo]

I tried the same thing on my FreeBSD 11.0-CURRENT, everything works well.

[ajamshed]

Hi emctoo,

We tested packet-bricks on FreeBSD-10.2 but we patched the kernel with the latest netmap driver. We did not face any issues. Can you please try patching your kernel with the latest driver as well?

[emctoo]

@ajamshed
I'll try it later.