Re: [Xen-devel] Xen 4.7.0 boot PANIC on kernel 4.7.0-4 + UEFI ?

[lists@xxxxxxxxxxxx]

On Wed, Aug 3, 2016, at 02:01 AM, Jan Beulich wrote:
> Thanks. Does the use of /mapbs really matter for booting? I was
> assuming it would be relevant only for shutdown/reboot?

It has no effect on boot. With or without the "/mapbs" it boots Xen OK.

Without the "/mapbs" the system used to crash on reboot, but still continued 
with a reboot.  Reboot with the "/mapbs" was OK.

Now, even with the "/mapbs" the system crashes on reboot.


        [  196.052042] reboot: Restarting system
        (XEN) [2016-08-03 13:06:54] Hardware Dom0 shutdown: rebooting machine
        (XEN) [2016-08-03 13:06:54] APIC error on CPU0: 40(00)
        (XEN) [2016-08-03 13:06:54] ----[ Xen-4.7.0_09-454  x86_64  debug=n  
Not tainted ]----
        (XEN) [2016-08-03 13:06:54] CPU:    0
        (XEN) [2016-08-03 13:06:54] RIP:    e008:[<000000009e746340>] 
000000009e746340
        (XEN) [2016-08-03 13:06:54] RFLAGS: 0000000000010202   CONTEXT: 
hypervisor (d0v0)
        (XEN) [2016-08-03 13:06:54] rax: 000000009e746340   rbx: 
0000000000000000   rcx: 0000000000000000
        (XEN) [2016-08-03 13:06:54] rdx: 0000000000000000   rsi: 
0000000000000000   rdi: 0000000000000000
        (XEN) [2016-08-03 13:06:54] rbp: 0000000000000000   rsp: 
ffff83008ce27dc0   r8:  0000000000000000
        (XEN) [2016-08-03 13:06:54] r9:  0000000000000000   r10: 
0000000000000000   r11: 0000000000000000
        (XEN) [2016-08-03 13:06:54] r12: 0000000000000000   r13: 
0000000000000cf9   r14: 0000000000000065
        (XEN) [2016-08-03 13:06:54] r15: ffff830000000000   cr0: 
0000000080050033   cr4: 00000000001526e0
        (XEN) [2016-08-03 13:06:54] cr3: 000000084b4e5000   cr2: 
000000009e746340
        (XEN) [2016-08-03 13:06:54] ds: 0000   es: 0000   fs: 0000   gs: 0000   
ss: e010   cs: e008
        (XEN) [2016-08-03 13:06:54] Xen code around <000000009e746340> 
(000000009e746340):
        (XEN) [2016-08-03 13:06:54]  00 00 00 00 00 00 00 00 <00> 00 00 00 00 
00 00 00 00 00 00 00 00 00 00 00
        (XEN) [2016-08-03 13:06:54] Xen stack trace from rsp=ffff83008ce27dc0:
        (XEN) [2016-08-03 13:06:55]    000000009efe42f6 0000000000000cf9 
ffff82d08022f741 efff000000000000
        (XEN) [2016-08-03 13:06:55]    ffff82d0807fe000 000000084b4e5000 
ffff82d08022f94a 000000085da98000
        (XEN) [2016-08-03 13:06:55]    0000000000000000 0000000000000007 
000000000000e008 0000000000000292
        Initializing Adapter 0

        ...
        XEN) [2016-08-03 13:30:44] Xen call trace:
        (XEN) [2016-08-03 13:30:44]    [<000000009e7463c6>] 000000009e7463c6
        (XEN) [2016-08-03 13:30:44]    [<ffff82d0801670f6>] 
i387.c#_vcpu_save_fpu+0x86/0x190
        (XEN) [2016-08-03 13:30:44]    [<ffff82d08022f94a>] 
efi_reset_system+0x3a/0x60
        (XEN) [2016-08-03 13:30:44]    [<ffff82d08018bcc8>] 
machine_restart+0x208/0x2d0
        (XEN) [2016-08-03 13:30:44]    [<ffff82d08012bf8d>] 
hwdom_shutdown+0x7d/0xf0
        (XEN) [2016-08-03 13:30:44]    [<ffff82d080105871>] 
domain_shutdown+0xf1/0x100
        (XEN) [2016-08-03 13:30:44]    [<ffff82d08012b042>] 
do_sched_op+0x1b2/0x460
        (XEN) [2016-08-03 13:30:44]    [<ffff82d08022c65b>] 
lstar_enter+0x9b/0xa0
        (XEN) [2016-08-03 13:30:44]
        (XEN) [2016-08-03 13:30:44]
        (XEN) [2016-08-03 13:30:44] ****************************************
        (XEN) [2016-08-03 13:30:44] Panic on CPU 0:
        (XEN) [2016-08-03 13:30:44] GENERAL PROTECTION FAULT
        (XEN) [2016-08-03 13:30:44] [error_code=0000]
        (XEN) [2016-08-03 13:30:44] ****************************************

And still reboots.

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