linux-kernel - Re: [BUG] 2.6.23-rc3-mm1 kernel BUG at mm/page

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Date:	Fri, 24 Aug 2007 11:45:09 +0530
From:	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>
To:	Christoph Lameter <clameter@....com>
CC:	Andrew Morton <akpm@...ux-foundation.org>,
	Mel Gorman <mel@...net.ie>, linux-kernel@...r.kernel.org,
	Balbir Singh <balbir@...ux.vnet.ibm.com>, linux-mm@...ck.org
Subject: Re: [BUG] 2.6.23-rc3-mm1 kernel BUG at mm/page_alloc.c:2876!

Christoph Lameter wrote:
> On Thu, 23 Aug 2007, Kamalesh Babulal wrote:
>
>   
>> After applying the patch, the call trace is gone but the kernel bug
>> is still hit
>>     
>
> Yes that is what we expected. We need more information to figure out why 
> the kmalloc_node fails there. It should walk through all nodes to find 
> memory.
>
> I see that you have 4 cpus and 16 nodes. How are the cpus assigned to 
> nodes? If a cpu would be assigned to a nonexisting node then this could be 
> the result.
>
> Could you post the full boot log?
>
>   
boot log with the andrew patch applied

Welcome to yaboot version 1.3.13
Enter "help" to get some basic usage information
boot: autobench
Please wait, loading kernel...
Elf64 kernel loaded...
Loading ramdisk...
ramdisk loaded at 02400000, size: 1191 Kbytes
OF stdout device is: /vdevice/vty@...00000
Hypertas detected, assuming LPAR !
command line: ro console=hvc0 autobench_args: root=/dev/sda6 
ABAT:1187885681
memory layout at init:
alloc_bottom : 000000000252a000
alloc_top : 0000000008000000
alloc_top_hi : 0000000100000000
rmo_top : 0000000008000000
ram_top : 0000000100000000
Looking for displays
instantiating rtas at 0x00000000077d9000 ... done
0000000000000000 : boot cpu 0000000000000000
0000000000000002 : starting cpu hw idx 0000000000000002... done
copying OF device tree ...
Building dt strings...
Building dt structure...
Device tree strings 0x000000000262b000 -> 0x000000000262c1d3
Device tree struct 0x000000000262d000 -> 0x0000000002635000
Calling quiesce ...
returning from prom_init
Partition configured for 4 cpus.


Starting Linux PPC64 #1 SMP Thu Aug 23 11:54:44 EDT 2007
-----------------------------------------------------
ppc64_pft_size = 0x1a
physicalMemorySize = 0x100000000
ppc64_caches.dcache_line_size = 0x80
ppc64_caches.icache_line_size = 0x80
htab_address = 0x0000000000000000
htab_hash_mask = 0x7ffff
-----------------------------------------------------
Linux version 2.6.23-rc3-mm1-autokern1 
(root@...ko-lp3.ltc.austin.ibm.com) (gcc version 3.4.6 20060404 (Red Hat 
3.4.6-3)) #1 SMP Thu Aug 23 11:54:44 EDT 2007
[boot]0012 Setup Arch
vmemmap cf00000000000000 allocated at c000000001000000, physical 
0000000001000000.
vmemmap cf00000001000000 allocated at c000000004000000, physical 
0000000004000000.
vmemmap cf00000002000000 allocated at c000000005000000, physical 
0000000005000000.
vmemmap cf00000003000000 allocated at c000000006000000, physical 
0000000006000000.
EEH: PCI Enhanced I/O Error Handling Enabled
PPC64 nvram contains 7168 bytes
Zone PFN ranges:
DMA 0 -> 1048576
Normal 1048576 -> 1048576
Movable zone start PFN for each node
early_node_map[1] active PFN ranges
2: 0 -> 1048576
Could not find start_pfn for node 0
[boot]0015 Setup Done
Built 2 zonelists in Node order, mobility grouping off. Total pages: 0
Policy zone: DMA
Kernel command line: ro console=hvc0 autobench_args: root=/dev/sda6 
ABAT:1187885681
[boot]0020 XICS Init
[boot]0021 XICS Done
PID hash table entries: 4096 (order: 12, 32768 bytes)
Console: colour dummy device 80x25
console handover: boot [udbg0] -> real [hvc0]
Dentry cache hash table entries: 524288 (order: 10, 4194304 bytes)
Inode-cache hash table entries: 262144 (order: 9, 2097152 bytes)
freeing bootmem node 2
Memory: 4105840k/4194304k available (4964k kernel code, 88464k reserved, 
948k data, 571k bss, 264k init)
SLUB: Genslabs=12, HWalign=128, Order=0-1, MinObjects=4, CPUs=4, Nodes=16
------------[ cut here ]------------
kernel BUG at mm/page_alloc.c:2878!
cpu 0x0: Vector: 700 (Program Check) at [c0000000005cbbe0]
pc: c0000000004b5160: .setup_per_cpu_pageset+0x24/0x48
lr: c0000000004b5160: .setup_per_cpu_pageset+0x24/0x48
sp: c0000000005cbe60
msr: 8000000000029032
current = 0xc0000000004fd1b0
paca = 0xc0000000004fdd80
pid = 0, comm = swapper
kernel BUG at mm/page_alloc.c:2878!
enter ? for help
[c0000000005cbee0] c0000000004978d8 .start_kernel+0x304/0x3f4
[c0000000005cbf90] c0000000003bef1c .start_here_common+0x54/0x58

-
Kamalesh Babulal.



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