[Xen-users] Getting more info from assert fails ?

[HÃkon Alstadheim <hakon@xxxxxxxxxxxxxxxxxx>]

In the last couple of days I've got theese in my xen console:

----
$ grep Assertion xen-serial*
xen-serial.2.log:(XEN) [2016-01-15 07:02:56] Assertion '(sp == 0) ||
(peoi[sp-1].vector < vector)' failed at irq.c:1163
xen-serial.4.log:(XEN) [2016-01-12 17:40:20] Assertion '(sp == 0) ||
(peoi[sp-1].vector < vector)' failed at irq.c:1163
xen-serial.log:(XEN) [2016-01-15 07:14:05] Assertion '(sp == 0) ||
(peoi[sp-1].vector < vector)' failed at irq.c:1163
----
The last one can be seen with some context at the bottom of this email.

Not being a developer I'm unsure how to proceed (other than keeping up
with updates) . Is there some knob I can twiddle either at run-time or
compile-time to get some more info on this, to allow me to find a
work-around for this bug? Running the latest ~amd64 xen  (i.e. 4.6.0-r7
) with Linux gentoo 4.1.12-gentoo as dom0. I suspect the problem is my
usb and/or sound cards, which I gather use some kind of "legacy" irq and
low memory. Would be nice to have that confirmed though.

The last Asert fail in full:

-------------
(XEN) [2016-01-15 07:02:56] Assertion '(sp == 0) || (peoi[sp-1].vector <
vector)' failed at irq.c:1163
(XEN) [2016-01-15 07:02:56] ----[ Xen-4.6.0  x86_64  debug=y  Not
tainted ]----
(XEN) [2016-01-15 07:02:56] CPU:    19
(XEN) [2016-01-15 07:02:56] RIP:    e008:[<ffff82d08017017e>]
do_IRQ+0x3ca/0x63b
(XEN) [2016-01-15 07:02:56] RFLAGS: 0000000000010046   CONTEXT: hypervisor
(XEN) [2016-01-15 07:02:56] rax: 0000000000000001   rbx:
ffff830839c06b00   rcx: 0000000000000001
(XEN) [2016-01-15 07:02:56] rdx: ffff830839d86480   rsi:
0000000000000033   rdi: 0000000000000033
(XEN) [2016-01-15 07:02:56] rbp: ffff83107e06fdc8   rsp:
ffff83107e06fd68   r8:  0000000000001a3c
(XEN) [2016-01-15 07:02:56] r9:  ffff830857e7b650   r10:
ffff880039bd7d80   r11: 0000000000000000
(XEN) [2016-01-15 07:02:56] r12: ffff8310418e8ef0   r13:
0000000000000033   r14: 0000000000006b00
(XEN) [2016-01-15 07:02:56] r15: 000000000000006b   cr0:
000000008005003b   cr4: 00000000001526e0
(XEN) [2016-01-15 07:02:56] cr3: 00000004cfcfd000   cr2: 00007f903fa37030
(XEN) [2016-01-15 07:02:56] ds: 0000   es: 0000   fs: 0000   gs: 0000  
ss: 0000   cs: e008
(XEN) [2016-01-15 07:02:56] Xen stack trace from rsp=ffff83107e06fd68:
(XEN) [2016-01-15 07:02:56]    ffff831000000000 ffff830839c06b24
0000000000000000 0000006b8034a480
(XEN) [2016-01-15 07:02:56]    0000001300000013 ffff830857e7b000
ffff82d08034a480 00013afa0cbacffd
(XEN) [2016-01-15 07:02:56]    ffff830839d8c840 0000000000000004
0000000000000008 ffff830839d8c900
(XEN) [2016-01-15 07:02:56]    00007cef81f90207 ffff82d08023b132
ffff830839d8c900 0000000000000008
(XEN) [2016-01-15 07:02:56]    0000000000000004 ffff830839d8c840
ffff83107e06fef0 00013afa0cbacffd
(XEN) [2016-01-15 07:02:56]    0000000000000000 ffff880039bd7d80
ffff830857e7b650 0000000000001a3c
(XEN) [2016-01-15 07:02:56]    ffff830839d86020 20c49ba5e353f7cf
ffff83107e068000 00013afa0cba5d69
(XEN) [2016-01-15 07:02:56]    ffff830839d8c870 0000003300000000
ffff82d0801af0ba 000000000000e008
(XEN) [2016-01-15 07:02:56]    0000000000000202 ffff83107e06fe80
0000000000000000 0000002075ff8000
(XEN) [2016-01-15 07:02:56]    00013afa0cb5fbb1 ffff82d0801eba00
ffff83107e06ff08 ffff82d080321a00
(XEN) [2016-01-15 07:02:56]    0000000000000000 0000000000000000
0000037c000019fc ffffffff81a04000
(XEN) [2016-01-15 07:02:56]    ffff83107e068000 ffff83007ddd6000
00000000ffffffff ffff83083ffe7000
(XEN) [2016-01-15 07:02:56]    ffff830857e7b000 ffff83107e06ff10
ffff82d0801607bc ffff82d08012c574
(XEN) [2016-01-15 07:02:56]    ffff830075ff8000 ffff83107e06fdd8
ffffffff81a04000 ffffffff81a04000
(XEN) [2016-01-15 07:02:56]    ffffffff81a04000 0000000000000000
ffffffff81a03ed8 0000000000000000
(XEN) [2016-01-15 07:02:56]    0000000000000000 ffff880039bd7d80
0000000000000000 0000000000000000
(XEN) [2016-01-15 07:02:56]    0000000000000000 ffffffff81a2e700
ffff8803bf20da70 0000000000000000
(XEN) [2016-01-15 07:02:56]    0000000000000000 0000beef0000beef
ffffffff81038162 000000bf0000beef
(XEN) [2016-01-15 07:02:56]    0000000000000286 ffffffff81a03ed8
000000000000beef 000000000000beef
(XEN) [2016-01-15 07:02:56]    000000000000beef 000000000000beef
000000000000beef 0000000000000013
(XEN) [2016-01-15 07:02:56] Xen call trace:
(XEN) [2016-01-15 07:02:56]    [<ffff82d08017017e>] do_IRQ+0x3ca/0x63b
(XEN) [2016-01-15 07:02:56]    [<ffff82d08023b132>]
common_interrupt+0x62/0x70
(XEN) [2016-01-15 07:02:56]    [<ffff82d0801af0ba>] mwait_idle+0x2cb/0x315
(XEN) [2016-01-15 07:02:56]    [<ffff82d0801607bc>] idle_loop+0x51/0x6b
(XEN) [2016-01-15 07:02:56]
(XEN) [2016-01-15 07:02:56]
(XEN) [2016-01-15 07:02:56] ****************************************
(XEN) [2016-01-15 07:02:56] Panic on CPU 19:
(XEN) [2016-01-15 07:02:56] Assertion '(sp == 0) || (peoi[sp-1].vector <
vector)' failed at irq.c:1163
(XEN) [2016-01-15 07:02:56] ****************************************
(XEN) [2016-01-15 07:02:56]
(XEN) [2016-01-15 07:02:56] Reboot in five seconds...
-----------------

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