RE: [Xen-devel] Unknown interrupt on x86_64 Xen on ES7000 x86_64

["Puthiyaparambil, Aravindh" <aravindh.puthiyaparambil@xxxxxxxxxx>]

> I have the same problem "Unknown Interrupt" on a DP machine. Looks
like
> #PF is happening at => when xen is built with debug=y.
> 
> static void map_alloc(unsigned long first_page, unsigned long
nr_pages)
> {
>     ...
>     curr_idx  = first_page / PAGES_PER_MAPWORD;
>     start_off = first_page & (PAGES_PER_MAPWORD-1);
>     end_idx   = (first_page + nr_pages) / PAGES_PER_MAPWORD;
>     end_off   = (first_page + nr_pages) & (PAGES_PER_MAPWORD-1);
> 
>     if ( curr_idx == end_idx )
>     {
>         alloc_bitmap[curr_idx] &= -(1UL<<end_off) |
> ((1UL<<start_off)-1);
>     }
>     else
>     {
>         alloc_bitmap[curr_idx] &= (1UL<<start_off)-1;
>         while ( ++curr_idx != end_idx ) alloc_bitmap[curr_idx] = 0;
>  =>       alloc_bitmap[curr_idx] &= -(1UL<<end_off);
>     }
> }
> 
> If I change
>         while ( ++curr_idx != end_idx - 1 ) alloc_bitmap[curr_idx] =
0;
> I can work around it.

Yes, that fixed the "Unknown Interrupt" problem. I am now seeing the
same issue that I am seeing on the Dell PowerEdge 470 x86_64 system.

BTW, what is a DP machine?

Aravindh

----------------------------

(XEN) Scrubbing Free RAM: ..Assertion 'tsc_elapsed32 != 0' failed, line
821, file time.c
(XEN) Assertion 'tsc_elapsed32 != 0' failed, line 821, file time.c
(XEN) BUG at time.c:821
(XEN) BUG at time.c:821
(XEN) CPU:    2
(XEN) EIP:    e010:[<ffff8300001368c9>]CPU:    3
(XEN) EIP:    e010:[<ffff8300001368c9>]
local_time_calibration+0x479/0x600
(XEN) EFLAGS: 0000000000010282
(XEN) rax: 0000000000000000   rbx: 000000007fffffff   rcx:
0000000000001807   rdx: 0000000000005807
(XEN) rsi: 0000000000000001   rdi: ffff8300000b8fa0   rbp:
0000000000000000   rsp: ffff8300001dfde0
(XEN) r8:  0000000000000001   r9:  0000000000000017   r10:
ffff8300000b8000   r11: 0000000000004001
(XEN) r12: 00000000ffff6ff4   r13: 000000000044c693   r14:
000000003b9aca00   r15: 0000000000000000
(XEN)  local_time_calibration+0x479/0x600
(XEN) EFLAGS: 0000000000010282
(XEN) rax: 0000000000000000   rbx: 000000007fffffff   rcx:
000000000000181f   rdx: 000000000000581f
(XEN) rsi: 0000000000000001   rdi: ffff8300000b8fa0   rbp:
0000000000000000   rsp: ffff8300001d7de0
(XEN) r8:  0000000000000001   r9:  0000000000000017   r10:
ffff8300000b8000   r11: 0000000000004001
(XEN) r12: 00000000ffffefa2   r13: 00000000004559e5   r14:
000000003b9aca00   r15: 0000000000000000
(XEN) Xen stack trace from rsp=ffff8300001dfde0:
(XEN)    0000000000000000 000000003be040cf 0000000000000002
8000000000179100 00000000ef899ea6 0000000028d8c62e 000000020018040
0 ffff830000180500
(XEN)    ffff830000136450 0000000000000000 ffff830000180400
0000000000000100 000000003be1011f ffff830000109345 000000000000010
0 ffff830000180400
(XEN)    0000000000000002 ffff830000189880 ffff83000018a780
ffff830000189780 0000000000000002 0000000000000000 000000000000000
0 ffff830000118c9a
(XEN)    000000ef00000000 0000000000000100 ffffffffffffc000
0000000000000002 ffff8300001a6f10 ffff830000124c0c 000000000000000
2 ffff830000ff0080
(XEN)    ffff8300001dff28 0000000000000000 0000000000000000
ffff830000124ce0 0000000000000000 00000000ffffffff 000000000000000
0 ffff8300001619f8
(XEN)    00000000a5a5a5a5 0000000000000000 0000000000000000
0000000000000000 0000000000000000 0000000000000000 000000000000000
0 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000
0000000000000000 0000000000000000 0000000000000000 000000000000000
0 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000
0000000000000000 0000000000000000 0000000000000000 000000000000000
0 Xen stack trace from rsp=ffff8300001d7de0:
(XEN)    0000000000000000 000000003be05ffb 0000000000000003
8000000000179100 00000000ef8b97ba 0000000028d90422 000000030018040
0 ffff830000180580
(XEN)    ffff830000136450 0000000000000000 ffff830000180400
0000000000000180 000000003be12081 ffff830000109345 000000000000018
0 ffff830000180400
(XEN)    0000000000000003 ffff830000189900 ffff83000018a780
ffff830000189780 0000000000000003 0000000000000000 000000000000000
0 ffff830000118c9a
(XEN)    000000ef00000000 0000000000000180 ffffffffffffc000
0000000000000003 ffff8300001a6f10 ffff830000124c0c 000000000000000
3 ffff8300001da080
(XEN)    ffff8300001d7f28 0000000000000000 0000000000000000
ffff830000124ce0 0000000000000000 00000000ffffffff 000000000000000
0 ffff8300001619f8
(XEN)    00000000a5a5a5a5 0000000000000000 0000000000000000
0000000000000000 0000000000000000 0000000000000000 000000000000000
0 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000
0000000000000000 0000000000000000 0000000000000000 000000000000000
0 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000000
0000000000000000 0000000000000000 0000000000000000 000000000000000
0 0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000003
ffff8300001da080
(XEN) Xen call trace from rsp=ffff8300001d7de0:
(XEN)    [<ffff830000136450>]0000000000000000
(XEN)    0000000000000000 0000000000000000 0000000000000002
ffff830000ff0080
(XEN)  local_time_calibration+0x0/0x600
(XEN) [<ffff830000109345>]Xen call trace from rsp=ffff8300001dfde0:
(XEN)    [<ffff830000136450>] ac_timer_softirq_action+0x185/0x300
(XEN) [<ffff830000118c9a>] local_time_calibration+0x0/0x600
(XEN) [<ffff830000109345>] do_softirq+0xaa/0xc0
(XEN) [<ffff830000124c0c>] ac_timer_softirq_action+0x185/0x300
(XEN) [<ffff830000118c9a>] idle_loop+0xac/0xd0
(XEN) [<ffff830000124ce0>] do_softirq+0xaa/0xc0
(XEN) [<ffff830000124c0c>] startup_cpu_idle_loop+0xb0/0xc0
(XEN) [<ffff8300001619f8>] idle_loop+0xac/0xd0
(XEN) [<ffff830000124ce0>] start_secondary+0xb8/0xc0
(XEN)
(XEN)  startup_cpu_idle_loop+0xb0/0xc0
(XEN) [<ffff8300001619f8>]
****************************************
Panic on CPU3:
CPU3 FATAL TRAP: vector = 6 (invalid operand)
[error_code=0000]
****************************************

Reboot in five seconds...
 start_secondary+0xb8/0xc0
(XEN)

****************************************
Panic on CPU2:
CPU2 FATAL TRAP: vector = 6 (invalid operand)
[error_code=0000]
****************************************

Reboot in five seconds...
(XEN) ......

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