[Bug 235856] FreeBSD freezes on AWS EC2 t3 machines

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=235856

--- Comment #7 from Alex Dupre <ale at FreeBSD.org> ---
I'm not 100% sure, but it looks like it didn't happen recently, so it might be
fixed.

The last reboot of that machine was caused by this:

nvme1: Missing interrupt
nvme0: Missing interrupt
ena0: Keep alive watchdog timeout.
ena0: Trigger reset is on
ena0: device is going DOWN
nvme1: cpl does not map to outstanding cmd
cdw0:00000000 sqhd:000a sqid:0001 cid:000b p:0 sc:00 sct:0 m:0 dnr:0
nvme1: Resetting controller due to a timeout.
nvme1: resetting controller
nvme1: temperature threshold not supported
nvme1: aborting outstanding i/o
nvme1: READ sqid:1 cid:11 nsid:1 lba:82665664 len:64
nvme1: ABORTED - BY REQUEST (00/07) sqid:1 cid:11 cdw0:0
nvme1: Missing interrupt
ena0: ena0: device is going UP
link is UP
nvme1: Resetting controller due to a timeout.
nvme1: resetting controller
nvme1: temperature threshold not supported
nvme1: aborting outstanding i/o
nvme1: READ sqid:1 cid:11 nsid:1 lba:101778688 len:64
nvme1: ABORTED - BY REQUEST (00/07) sqid:1 cid:11 cdw0:0
nvme1: aborting outstanding i/o
nvme1: READ sqid:1 cid:21 nsid:1 lba:93070656 len:64
nvme1: ABORTED - BY REQUEST (00/07) sqid:1 cid:21 cdw0:0
nvme1: aborting outstanding i/o
nvme1: WRITE sqid:1 cid:4 nsid:1 lba:87852928 len:64
nvme1: ABORTED - BY REQUEST (00/07) sqid:1 cid:4 cdw0:0


Fatal trap 12: page fault while in kernel mode
cpuid = 2; apic id = 02
fault virtual address   = 0x18
fault code              = supervisor write data, page not present
instruction pointer     = 0x20:0xffffffff80ae362e
stack pointer           = 0x28:0xfffffe00741bc1c0
frame pointer           = 0x28:0xfffffe00741bc200
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         = 12 (irq258: nvme0)
trap number             = 12
panic: page fault
cpuid = 2
time = 1563188396
KDB: stack backtrace:
#0 0xffffffff80be7957 at kdb_backtrace+0x67
#1 0xffffffff80b9b543 at vpanic+0x1a3
#2 0xffffffff80b9b393 at panic+0x43
#3 0xffffffff81074bff at trap_fatal+0x35f
#4 0xffffffff81074c59 at trap_pfault+0x49
#5 0xffffffff8107427e at trap+0x29e
#6 0xffffffff8104f6f5 at calltrap+0x8
#7 0xffffffff807674f6 at nvme_qpair_complete_tracker+0x166
#8 0xffffffff807672b4 at nvme_qpair_process_completions+0x94
#9 0xffffffff80b5edf7 at ithread_loop+0x1a7
#10 0xffffffff80b5bf13 at fork_exit+0x83
#11 0xffffffff810506ee at fork_trampoline+0xe
Uptime: 5d3h3m9s

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