[Hyper-V][camlock] storvsc driver panics during boot with patches from camlock project

Thu Oct 24 05:34:29 UTC 2013

Hello again.

Camlock patches are now committed and -CURRENT on Hyper-V now panics
with almost the same stacktrace:

FreeBSD 11.0-CURRENT #16 r257016: Wed Oct 23 21:08:44 UTC 2013
    olsi at current:/usr/obj/usr/src/sys/HYPERVKERNEL amd64
FreeBSD clang version 3.3 (tags/RELEASE_33/final 183502) 20130610
CPU: Intel(R) Core(TM) i5-2540M CPU @ 2.60GHz (1309.57-MHz K8-class CPU)
  Origin = "GenuineIntel"  Id = 0x206a7  Family = 0x6  Model = 0x2a
Stepping = 7

......

ZFS filesystem version: 5
ZFS storage pool version: features support (5000)
Timecounters tick every 10.000 msec
storvsc0 on vmbus0
kernel trap 12 with interrupts disabled

Fatal trap 12: page fault while in kernel mode
cpuid = 0; apic id = 00
fault virtual address   = 0x20
fault code              = supervisor read data, page not present
instruction pointer     = 0x20:0xffffffff804f58cc
stack pointer           = 0x28:0xfffffe011dd5f5d0
frame pointer           = 0x28:0xfffffe011dd5f600
code segment            = base 0x0, limit 0xfffff, type 0x1b
                        = DPL 0, pres 1, long 1, def32 0, gran 1
processor eflags        = resume, IOPL = 0
current process         = 0 (hv_control_1 taskq)
[ thread pid 0 tid 100047 ]
Stopped at      turnstile_broadcast+0x8c:       movq    0x20(%rbx,%rax,1),%rdx
db> bt
Tracing pid 0 tid 100047 td 0xfffff8000331e000
turnstile_broadcast() at turnstile_broadcast+0x8c/frame 0xfffffe011dd5f600
__mtx_unlock_sleep() at __mtx_unlock_sleep+0x60/frame 0xfffffe011dd5f630
unlock_mtx() at unlock_mtx+0x2a/frame 0xfffffe011dd5f640
_sleep() at _sleep+0x18e/frame 0xfffffe011dd5f6c0
cam_periph_runccb() at cam_periph_runccb+0x9e/frame 0xfffffe011dd5f7f0
storvsc_attach() at storvsc_attach+0x6d4/frame 0xfffffe011dd5f890
device_attach() at device_attach+0x3a2/frame 0xfffffe011dd5f8f0
hv_vmbus_child_device_register() at
hv_vmbus_child_device_register+0xdb/frame 0xfffffe011dd5f990
vmbus_channel_process_offer() at
vmbus_channel_process_offer+0x133/frame 0xfffffe011dd5f9d0
work_item_callback() at work_item_callback+0x26/frame 0xfffffe011dd5f9f0
taskqueue_run_locked() at taskqueue_run_locked+0xe6/frame 0xfffffe011dd5fa40
taskqueue_thread_loop() at taskqueue_thread_loop+0xa8/frame 0xfffffe011dd5fa70
fork_exit() at fork_exit+0x9a/frame 0xfffffe011dd5fab0
fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe011dd5fab0
--- trap 0, rip = 0, rsp = 0xfffffe011dd5fb70, rbp = 0 ---

Thanks

On Tue, Sep 24, 2013 at 3:04 AM, Abhishek Gupta (LIS)
<abgupta at microsoft.com> wrote:
> Hi Oleg,
>
> Please give us some time. I shall look at it. Thanks for reporting.
>
> Regards,
> Abhishek
>
> -----Original Message-----
> From: owner-freebsd-virtualization at freebsd.org [mailto:owner-freebsd-virtualization at freebsd.org] On Behalf Of Oleg Sidorkin
> Sent: Monday, September 23, 2013 7:21 AM
> To: freebsd-virtualization at freebsd.org
> Cc: Alexander Motin
> Subject: [Hyper-V][camlock] storvsc driver panics during boot with patches from camlock project
>
> Hello.
>
> I'm running the latest current (amd64) under Hyper-V with hyper-v services enabled.
> If camlock patches are applied
> (http://people.freebsd.org/~mav/camlock_patches/camlock_20130906.patch),
> I'm hitting the following  kernel panic during boot:
>
> FreeBSD 10.0-ALPHA2 #5 r255762M: Sun Sep 22 16:48:21 UTC 2013
>     olsi at current:/usr/obj/usr/src/sys/HYPERVKERNEL amd64 FreeBSD clang version 3.3 (tags/RELEASE_33/final 183502) 20130610
> CPU: Intel(R) Core(TM) i5-2540M CPU @ 2.60GHz (1309.17-MHz K8-class CPU)
>   Origin = "GenuineIntel"  Id = 0x206a7  Family = 0x6  Model = 0x2a Stepping =
>                             7
> ....
> Timecounter "Hyper-V" frequency 10000000 Hz quality 10000000 ZFS NOTICE: Prefetch is disabled by default if less than 4GB of RAM is present;
>             to enable, add "vfs.zfs.prefetch_disable=0" to /boot/loader.conf.
> ZFS filesystem version: 5
> ZFS storage pool version: features support (5000) Timecounters tick every 10.000 msec
> storvsc0 on vmbus0
> Netvsc initializing... SMP: AP CPU #3 Launched!
> SMP: AP CPU #2 Launched!
> SMP: AP CPU #1 Launched!
> kernel trap 12 with interrupts disabled
>
>
> Fatal trap 12: page fault while in kernel mode cpuid = 3; apic id = 03
> fault virtual address   = 0x20
> fault code              = supervisor read data, page not present
> instruction pointer     = 0x20:0xffffffff804f444c
> stack pointer           = 0x28:0xfffffe011df38610
> frame pointer           = 0x28:0xfffffe011df38640
> code segment            = base 0x0, limit 0xfffff, type 0x1b
>                         = DPL 0, pres 1, long 1, def32 0, gran 1
> processor eflags        = resume, IOPL = 0
> current process         = 0 (hv_control_1 taskq)
> [ thread pid 0 tid 100046 ]
> Stopped at      turnstile_broadcast+0x8c:       movq    0x20(%rbx,%rax,1),%rdx
> db> bt
> Tracing pid 0 tid 100046 td 0xfffff80001f20490
> turnstile_broadcast() at turnstile_broadcast+0x8c/frame 0xfffffe011df38640
> __mtx_unlock_sleep() at __mtx_unlock_sleep+0x60/frame 0xfffffe011df38670
> unlock_mtx() at unlock_mtx+0x2a/frame 0xfffffe011df38680
> _sleep() at _sleep+0x18e/frame 0xfffffe011df38700
> cam_periph_runccb() at cam_periph_runccb+0x9e/frame 0xfffffe011df38800
> storvsc_attach() at storvsc_attach+0x6d4/frame 0xfffffe011df388a0
> device_attach() at device_attach+0x396/frame 0xfffffe011df388f0
> hv_vmbus_child_device_register() at
> hv_vmbus_child_device_register+0xdb/frame 0xfffffe011df38990
> vmbus_channel_process_offer() at
> vmbus_channel_process_offer+0x133/frame 0xfffffe011df389d0
> work_item_callback() at work_item_callback+0x26/frame 0xfffffe011df389f0
> taskqueue_run_locked() at taskqueue_run_locked+0xe6/frame 0xfffffe011df38a40
> taskqueue_thread_loop() at taskqueue_thread_loop+0xa8/frame 0xfffffe011df38a70
> fork_exit() at fork_exit+0x9a/frame 0xfffffe011df38ab0
> fork_trampoline() at fork_trampoline+0xe/frame 0xfffffe011df38ab0
> --- trap 0, rip = 0, rsp = 0xfffffe011df38b70, rbp = 0 ---
> db>
>
>
> This patch is not commited yet (CFT thread with changes description is
> here: http://lists.freebsd.org/pipermail/freebsd-hackers/2013-September/043333.html),
> but it is going to be commited till the end of the year.
>
> As far as I understand, the invocation chain is storvsc_attach->scan_for_luns->cam_periph_runccb
>
> Thanks
> --
> Oleg Sidorkin
> _______________________________________________
> freebsd-virtualization at freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-virtualization
> To unsubscribe, send any mail to "freebsd-virtualization-unsubscribe at freebsd.org"

-- 
Oleg Sidorkin