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Date:      Mon, 22 Feb 2016 08:35:16 -0800
From:      Andy Carrel <wac@google.com>
To:        stable@freebsd.org
Subject:   10.3-BETA2 panic on boot with GCE NVMe
Message-ID:  <CAPX1pZM%2BBa=EJWB5HJuDv%2B9AB8x0iODrdBki6cpynDHQXA8Gkw@mail.gmail.com>

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I've created a 10.3-BETA2 image for Google Compute Engine using swills'
script and am getting a panic on boot when the VM is configured with Local
SSD as NVMe (--local-ssd interface="NVME"). This is a regression from
10.2-RELEASE which will boot successfully with an identical configuration.

"""
Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address = 0x60
fault code = supervisor read data, page not present
instruction pointer = 0x20:0xffffffff80e16019
stack pointer        = 0x28:0xfffffe01bfff59c0
frame pointer        = 0x28:0xfffffe01bfff59e0
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 (irq11: virtio_pci0+)
[ thread pid 12 tid 100039 ]
Stopped at      nvme_ctrlr_intx_handler+0x39:   cmpq    $0,0x60(%rdi)
db> bt
Tracing pid 12 tid 100039 td 0xfffff8000422e000
nvme_ctrlr_intx_handler() at nvme_ctrlr_intx_handler+0x39/frame
0xfffffe01bfff59e0
intr_event_execute_handlers() at intr_event_execute_handlers+0xab/frame
0xfffffe01bfff5a20
ithread_loop() at ithread_loop+0x96/frame 0xfffffe01bfff5a70
fork_exit() at fork_exit+0x9a/frame 0xfffffe01bfff5ab0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe01bfff5ab0
--- trap 0, rip = 0, rsp = 0, rbp = 0 ---
"""



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