I just upgraded a machine from 10-STABLE to FreeBSD 11, and the machine seems to crash frequently if flowtable is enabled. Other machines I have using the identical kernel does not seem to be affected, and the same hardward on the old 10-STABLE branch was quick stable. Interfaces on this machine include several vlans on top of a lagg. Does anyone have any ideas what the trouble might be? Crash stack trace: Fatal trap 12: page fault while in kernel mode cpuid = 7; apic id = 26 fault virtual address = 0x3b0 fault code = supervisor read data, page not present instruction pointer = 0x20:0xffffffff80c55a6b stack pointer = 0x28:0xfffffe088a32b1b0 frame pointer = 0x28:0xfffffe088a32b240 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 = 8419 (sendmail) trap number = 12 panic: page fault cpuid = 7 KDB: stack backtrace: db_trace_self_wrapper() at 0xffffffff8044e24b = db_trace_self_wrapper+0x2b/frame 0xfffffe088a32ad40 vpanic() at 0xffffffff80c5aaa2 = vpanic+0x182/frame 0xfffffe088a32adc0 panic() at 0xffffffff80c5a913 = panic+0x43/frame 0xfffffe088a32ae20 trap_fatal() at 0xffffffff810ac341 = trap_fatal+0x351/frame 0xfffffe088a32ae80 trap_pfault() at 0xffffffff810ac533 = trap_pfault+0x1e3/frame 0xfffffe088a32aee0 trap() at 0xffffffff810ababc = trap+0x26c/frame 0xfffffe088a32b0f0 calltrap() at 0xffffffff8108e191 = calltrap+0x8/frame 0xfffffe088a32b0f0 --- trap 0xc, rip = 0xffffffff80c55a6b, rsp = 0xfffffe088a32b1c0, rbp = 0xfffffe088a32b240 --- __rw_wlock_hard() at 0xffffffff80c55a6b = __rw_wlock_hard+0xfb/frame 0xfffffe088a32b240 in_lltable_lookup() at 0xffffffff80e2196f = in_lltable_lookup+0xcf/frame 0xfffffe088a32b260 llentry_alloc() at 0xffffffff80d7ab5c = llentry_alloc+0x3c/frame 0xfffffe088a32b2b0 flowtable_lookup_common() at 0xffffffff80d5e316 = flowtable_lookup_common+0x326/frame 0xfffffe088a32b3a0 flowtable_lookup() at 0xffffffff80d5d7ac = flowtable_lookup+0x9c/frame 0xfffffe088a32b3f0 ip_output() at 0xffffffff80e398f8 = ip_output+0xa8/frame 0xfffffe088a32b540 tcp_output() at 0xffffffff80ecdb6b = tcp_output+0x195b/frame 0xfffffe088a32b6f0 tcp_usr_send() at 0xffffffff80edcf56 = tcp_usr_send+0x416/frame 0xfffffe088a32b790 sosend_generic() at 0xffffffff80cf7fc7 = sosend_generic+0x5e7/frame 0xfffffe088a32b860 soo_write() at 0xffffffff80cce9c9 = soo_write+0x49/frame 0xfffffe088a32b8a0 dofilewrite() at 0xffffffff80cc4167 = dofilewrite+0x87/frame 0xfffffe088a32b8f0 kern_writev() at 0xffffffff80cc3e48 = kern_writev+0x68/frame 0xfffffe088a32b940 sys_write() at 0xffffffff80cc3dd4 = sys_write+0x84/frame 0xfffffe088a32b990 amd64_syscall() at 0xffffffff810acca8 = amd64_syscall+0x4d8/frame 0xfffffe088a32bab0 Xfast_syscall() at 0xffffffff8108e47b = Xfast_syscall+0xfb/frame 0xfffffe088a32bab0 --- syscall (4, FreeBSD ELF64, sys_write), rip = 0x8017c4bca, rsp = 0x7fffffff9288, rbp = 0x7fffffff9410 --- -- -Jon