[Xen-devel] Xen-unstable: xen panic RIP: dpci_softirq

[Sander Eikelenboom <linux@xxxxxxxxxxxxxx>]

Hi Konrad / Jan,

One of these commits:
- aeeea485bcfe2a517ed9bcb3ba1c3be0f6824e07 dpci: move from an hvm_irq_dpci (and 
struct domain) to an hvm_dirq_dpci model
- f6dd295381f4b6a66acddacf46bca8940586c8d8 pci: replace tasklet with softirq

gives (running under 5 minutes of host boot, on AMD hardware and with guest 
with 
pci passthrough) the splat below.

--
Sander

(XEN) [2014-11-14 13:00:06.810] ----[ Xen-4.5.0-rc  x86_64  debug=y  Not 
tainted ]----
(XEN) [2014-11-14 13:00:06.810] CPU:    3
(XEN) [2014-11-14 13:00:06.810] RIP:    e008:[<ffff82d080148f14>] 
dpci_softirq+0x9c/0x231
(XEN) [2014-11-14 13:00:06.810] RFLAGS: 0000000000010283   CONTEXT: hypervisor
(XEN) [2014-11-14 13:00:06.811] rax: 0000000000100100   rbx: ffff830515c86d90   
rcx: 0000000000000001
(XEN) [2014-11-14 13:00:06.811] rdx: ffff83054ef30000   rsi: 0000000000000002   
rdi: ffff830518b3b0b8
(XEN) [2014-11-14 13:00:06.811] rbp: ffff83054ef37eb0   rsp: ffff83054ef37e50   
r8:  ffff830515c86d60
(XEN) [2014-11-14 13:00:06.811] r9:  0000016b62294400   r10: 0000016b63143e58   
r11: 0000000000000246
(XEN) [2014-11-14 13:00:06.811] r12: ffff830515c86d38   r13: ffff830518b3b000   
r14: ffff830515c86d28
(XEN) [2014-11-14 13:00:06.811] r15: ffff830515c86d28   cr0: 000000008005003b   
cr4: 00000000000006f0
(XEN) [2014-11-14 13:00:06.811] cr3: 000000009fc92000   cr2: 0000000000100108
(XEN) [2014-11-14 13:00:06.811] ds: 0000   es: 0000   fs: 0000   gs: 0000   ss: 
e010   cs: e008
(XEN) [2014-11-14 13:00:06.811] Xen stack trace from rsp=ffff83054ef37e50:
(XEN) [2014-11-14 13:00:06.811]    ffff83054ef37e60 ffff830518b3b0b8 
ffff830515c86d38 ffff83054ef37e70
(XEN) [2014-11-14 13:00:06.811]    ffff830515c86d90 ffff830515c86d90 
ffff83054ef37ef0 ffff82d080300100
(XEN) [2014-11-14 13:00:06.811]    ffff82d0802fff80 ffffffffffffffff 
ffff83054ef30000 0000000000000002
(XEN) [2014-11-14 13:00:06.811]    ffff83054ef37ee0 ffff82d08012bd91 
ffff83054ef30000 ffff83009faea000
(XEN) [2014-11-14 13:00:06.811]    00000000ffffffff ffff83054ef3e068 
ffff83054ef37ef0 ffff82d08012bde9
(XEN) [2014-11-14 13:00:06.811]    ffff83054ef37f10 ffff82d0801623d5 
ffff82d08012bde9 ffff83009fafd000
(XEN) [2014-11-14 13:00:06.811]    ffff83054ef37de8 ffffffff82200000 
ffffffff82200000 0000000000000000
(XEN) [2014-11-14 13:00:06.811]    0000000000000000 ffffffff82203e28 
ffffffff822f3ec0 0000000000000246
(XEN) [2014-11-14 13:00:06.811]    0000000000000001 0000000000000000 
0000000000000000 0000000000000000
(XEN) [2014-11-14 13:00:06.811]    ffffffff810013aa ffffffff8221c520 
00000000deadbeef 00000000deadbeef
(XEN) [2014-11-14 13:00:06.811]    0000010000000000 ffffffff810013aa 
000000000000e033 0000000000000246
(XEN) [2014-11-14 13:00:06.811]    ffffffff82203e10 000000000000e02b 
008000000000beef 000000000000beef
(XEN) [2014-11-14 13:00:06.811]    000000000000beef 00000000ffffbeef 
ffffea0000000003 ffff83009fafd000
(XEN) [2014-11-14 13:00:06.811]    00000034cec15280 0000000000000000
(XEN) [2014-11-14 13:00:06.811] Xen call trace:
(XEN) [2014-11-14 13:00:06.811]    [<ffff82d080148f14>] dpci_softirq+0x9c/0x231
(XEN) [2014-11-14 13:00:06.811]    [<ffff82d08012bd91>] __do_softirq+0x81/0x8c
(XEN) [2014-11-14 13:00:06.811]    [<ffff82d08012bde9>] do_softirq+0x13/0x15
(XEN) [2014-11-14 13:00:06.811]    [<ffff82d0801623d5>] idle_loop+0x5e/0x6e
(XEN) [2014-11-14 13:00:06.811] 
(XEN) [2014-11-14 13:00:06.811] Pagetable walk from 0000000000100108:
(XEN) [2014-11-14 13:00:06.811]  L4[0x000] = 000000055d09a063 ffffffffffffffff
(XEN) [2014-11-14 13:00:06.811]  L3[0x000] = 000000055d099063 ffffffffffffffff
(XEN) [2014-11-14 13:00:06.811]  L2[0x000] = 000000055d098063 ffffffffffffffff 
(XEN) [2014-11-14 13:00:06.811]  L1[0x100] = 0000000000000000 ffffffffffffffff
(XEN) [2014-11-14 13:00:07.692] 
(XEN) [2014-11-14 13:00:07.700] ****************************************
(XEN) [2014-11-14 13:00:07.720] Panic on CPU 3:
(XEN) [2014-11-14 13:00:07.732] FATAL PAGE FAULT
(XEN) [2014-11-14 13:00:07.745] [error_code=0000]
(XEN) [2014-11-14 13:00:07.759] Faulting linear address: 0000000000100108
(XEN) [2014-11-14 13:00:07.778] ****************************************
(XEN) [2014-11-14 13:00:07.797] 
(XEN) [2014-11-14 13:00:07.806] Reboot in five seconds...


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