Andrew Morton wrote:
On Wed, 25 Jul 2007 23:41:46 +0100 Andy Whitcroft <[email protected]> wrote:
On Wed, Jul 25, 2007 at 05:36:56PM +0100, Andy Whitcroft wrote:
Will investigate the NUMA-Q explosion and report on that separatly.
Ok, I've been looking at the NUMA-Q boot panic below:
BUG: unable to handle kernel NULL pointer dereference at virtual address 00000000
printing eip:
c111689f
*pdpt = 0000000001387001
*pde = 0000000000000000
Oops: 0000 [#1]
SMP
Modules linked in:
CPU: 0
EIP: 0060:[<c111689f>] Not tainted VLI
EFLAGS: 00010286 (2.6.23-rc1-mm1-gc8131905-dirty #251)
EIP is at pci_create_bus+0x11b/0x277
eax: 00000000 ebx: c9352e00 ecx: c9073e94 edx: c9325400
esi: c9325400 edi: c932559c ebp: 00000002 esp: c9073e90
ds: 007b es: 007b fs: 00d8 gs: 0000 ss: 0068
Process swapper (pid: 1, ti=c9072000 task=c9070030 task.ti=c9072000)
Stack: c12adc4f c9325400 00000000 00000002 00000000 00000000 00000000 c934c800
000000d6 00000000 c1116a09 00000000 c9073ed5 c11b178a 00000000 c934c940
00000000 02fffff4 c12bd8ac c934c800 c12bd8b4 c9325000 c1119825 c934c800
Call Trace:
[<c1116a09>] pci_scan_bus_parented+0xe/0x21
[<c11b178a>] pci_fixup_i450nx+0xa7/0x101
[<c1119825>] pci_do_fixups+0x2d/0x38
[<c111665c>] pci_device_add+0x48/0x77
[<c11166a5>] pci_scan_single_device+0x1a/0x1f
[<c11166bf>] pci_scan_slot+0x15/0x47
[<c111670a>] pci_scan_child_bus+0x19/0x7c
[<c1116a14>] pci_scan_bus_parented+0x19/0x21
[<c11b259d>] pcibios_scan_root+0x75/0x7e
[<c1369ee3>] pci_numa_init+0x2c/0xe4
[<c1354b87>] kernel_init+0x0/0xa1
[<c1354a15>] do_initcalls+0x73/0x1a3
[<c109032c>] proc_register+0xa0/0xa7
[<c10905cd>] create_proc_entry+0x73/0x86
[<c103a5c9>] register_irq_proc+0x75/0x92
[<c1354b87>] kernel_init+0x0/0xa1
[<c1354be6>] kernel_init+0x5f/0xa1
[<c10031c3>] kernel_thread_helper+0x7/0x10
=======================
Code: ff 8b 83 84 00 00 00 c7 04 24 4f dc 2a c1 89 44 24 04 e8 f8 42 f0 ff 83 7c 24 14 00 75 15 8b 93 84 00 00 00 85 d2 74 0b 8b 43 44 <8b> 00 89 82 50 01 00 00 c7 44 24 04 9a 04 00 00 8d bb 88 00 00
EIP: [<c111689f>] pci_create_bus+0x11b/0x277 SS:ESP 0068:c9073e90
Kernel panic - not syncing: Attempted to kill init!
This seems to have been caused by the introduction of the following
code fragment into pci_create_bus:
if (!parent)
set_dev_node(b->bridge, pcibus_to_node(b));
This has come as part of the -mm patch below:
try-parent-numa_node-at-first-before-using-default-v2.patch
This patch does not seem to be wrong in and of itself. It does
expose the fact that we are building busses with NULL sysdata.
This has come up at least three times now. Below is the patch
proposed the last couple of times. It is needed to allow any machine
with i450nx quirk, plus for NUMA-Q systems.
All this could have happened due to my hamfisted repairing of yet another
reject storm, too.
Andrew please could you add this to -mm again.
ok..
Can we add .node and .iommu to pci_bus?
YH
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