[Xen-devel] Regression compared to Xen 4.3, Xen 4.4-rc2 - pci_prepare_msix+0xb1/0x12 - BOOM

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

Hey,

I hadn't done yet any diagnosis to figure out exactly which
PCI device is at fault here. But this is regression compared
to Xen 4.3 which boots just fine (see logs). The xen-syms
is at: http://darnok.org/xen/xen-syms.gz

I used idential kernel for Xen 4.3 and it booted nicely.

My next step is to instrument the do_physdev_op to figure out which
of the PCI devices is triggering this, but that will have to wait
till later this week.

What I get is this when booting Xen 4.4:


[   15.927480] xen: registering gsi 19 triggering 0 polarity 1
[   15.933039] Already setup the GSI :19
(XEN) [2014-01-22 05:38:00] ----[ Xen-4.4-rc2  x86_64  debug=y  Tainted:    C 
]----
(XEN) [2014-01-22 05:38:00] CPU:    0
(XEN) [2014-01-22 05:38:00] RIP:    e008:[<ffff82d080168d51>] 
pci_prepare_msix+0xb1/0x128
(XEN) [2014-01-22 05:38:00] RFLAGS: 0000000000010246   CONTEXT: hypervisor
(XEN) [2014-01-22 05:38:00] rax: 0000000000000000   rbx: 00000000fffffff0   
rcx: 0000000000000000
(XEN) [2014-01-22 05:38:00] rdx: ffff830239463b70   rsi: 0000000000000000   
rdi: 0000000000000000
(XEN) [2014-01-22 05:38:00] rbp: ffff82d0802cfe48   rsp: ffff82d0802cfe08   r8: 
 0000000000000000
(XEN) [2014-01-22 05:38:00] r9:  00000000deadbeef   r10: ffff82d080238f20   
r11: 0000000000000202
(XEN) [2014-01-22 05:38:00] r12: ffff830239466700   r13: 0000000000000005   
r14: 0000000000000000
(XEN) [2014-01-22 05:38:00] r15: 0000000000000005   cr0: 0000000080050033   
cr4: 00000000001526f0
(XEN) [2014-01-22 05:38:00] cr3: 000000022dc0c000   cr2: 0000000000000004
(XEN) [2014-01-22 05:38:00] ds: 0000   es: 0000   fs: 0000   gs: 0000   ss: 
e010   cs: e008
(XEN) [2014-01-22 05:38:00] Xen stack trace from rsp=ffff82d0802cfe08:
(XEN) [2014-01-22 05:38:00]    00000070b7313060 0000000000310f00 
ffff82d0802cfe68 000000000000001e
(XEN) [2014-01-22 05:38:00]    ffff880078623e28 ffff8300b7313000 
ffff880078716898 0000000000000000
(XEN) [2014-01-22 05:38:00]    ffff82d0802cfef8 ffff82d08017fede 
ffff82d08012a25f 0000000000000000
(XEN) [2014-01-22 05:38:00]    ffff82d000050000 ffff82d08018cdc8 
ffff82d080310f00 ffff82d0802cff18
(XEN) [2014-01-22 05:38:00]    ffff82d0802cfef8 ffff82d08021d98c 
0000000000040004 0000000000000246
(XEN) [2014-01-22 05:38:00]    ffffffff8100122a 0000000000000000 
ffffffff8100122a 000000000000e030
(XEN) [2014-01-22 05:38:00]    0000000000000246 ffff8300b7313000 
ffff880070fe2780 0000000000000000
(XEN) [2014-01-22 05:38:00]    ffff880078716898 0000000000000000 
00007d2f7fd300c7 ffff82d08022231b
(XEN) [2014-01-22 05:38:00]    ffffffff8100142a 0000000000000021 
ffff88007f60e0e0 0000000000000000
(XEN) [2014-01-22 05:38:00]    000000000007e8b5 00000003b5ef9df9 
ffff880078623e58 ffff880078716800
(XEN) [2014-01-22 05:38:00]    0000000000000202 0000000000000594 
0000000000000006 0000000000000000
(XEN) [2014-01-22 05:38:00]    0000000000000021 ffffffff8100142a 
0000000000000000 ffff880078623e28
(XEN) [2014-01-22 05:38:00]    000000000000001e 0001010000000000 
ffffffff8100142a 000000000000e033
(XEN) [2014-01-22 05:38:00]    0000000000000202 ffff880078623e10 
000000000000e02b 0000000000000000
(XEN) [2014-01-22 05:38:00]    0000000000000000 0000000000000000 
0000000000000000 0000000000000000
(XEN) [2014-01-22 05:38:00]    ffff8300b7313000 0000000000000000 
0000000000000000
(XEN) [2014-01-22 05:38:00] Xen call trace:
(XEN) [2014-01-22 05:38:00]    [<ffff82d080168d51>] pci_prepare_msix+0xb1/0x128
(XEN) [2014-01-22 05:38:00]    [<ffff82d08017fede>] do_physdev_op+0xd10/0x119e
(XEN) [2014-01-22 05:38:00]    [<ffff82d08022231b>] syscall_enter+0xeb/0x145
(XEN) [2014-01-22 05:38:00] 
(XEN) [2014-01-22 05:38:00] Pagetable walk from 0000000000000004:
(XEN) [2014-01-22 05:38:00]  L4[0x000] = 0000000000000000 ffffffffffffffff
(XEN) [2014-01-22 05:38:00] 
(XEN) [2014-01-22 05:38:00] ****************************************
(XEN) [2014-01-22 05:38:00] Panic on CPU 0:
(XEN) [2014-01-22 05:38:00] FATAL PAGE FAULT
(XEN) [2014-01-22 05:38:00] [error_code=0000]
(XEN) [2014-01-22 05:38:00] Faulting linear address: 0000000000000004
(XEN) [2014-01-22 05:38:00] ****************************************
(XEN) [2014-01-22 05:38:00] 
(XEN) [2014-01-22 05:38:00] Manual reset required ('noreboot' specified)

Attachment: tst035-xen-4.3.log
Description: Text document

Attachment: tst035-xen-4.4.log
Description: Text document

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel