* Christoph Lameter <cl@xxxxxxxxxxxxxxxxxxxx>:
> On Tue, 12 Jan 2010, Alex Chiang wrote:
>
> > My HP rx8640 (ia64, 16 CPUs) is experiencing a bad paging request
> > during boot.
>
> Hmmm... Thats with 64k page size?
Yes.
CONFIG_IA64_PAGE_SIZE_64KB=y
> > SLUB: Unable to allocate memory from node 2
> > SLUB: Allocating a useless per node structure in order to be able to continue
>
> Huh? What wrong with node 2?
I've seen that message for quite some time now.
Here's some info from the EFI shell.
Shell> dimmconfig
MEMORY INFORMATION
Cab/ Total Active Failed SW Deconf HW Deconf
Cell Slot Mem Mem DIMMs DIMMs DIMMs Unknown
---- ----- --------- --------- ------ --------- --------- -------
0 0/0 32768 MB 32768 MB 0 0 0 0
1 0/1 32768 MB 32768 MB 0 0 0 0
Active Memory : 65536 MB
Interleaved Memory : 512 MB
NonInterleaved Memory : 65024 MB
Installed Memory : 65536 MB
Firmware puts each cell into a NUMA node, so we should really
only have 2 nodes, but for some reason, that 3rd node gets
created too. I haven't inspected the SRAT/SLIT on this machine
recently, but can do so if you want me to.
> > [<a0000001001a7c60>] kmem_cache_open+0x420/0xca0
> > sp=e00007860955fdf0 bsp=e0000786095512e0
> > [<a0000001001a8cf0>] dma_kmalloc_cache+0x2d0/0x440
> > sp=e00007860955fdf0 bsp=e000078609551290
>
> Maybe we miscalculated the number of DMA caches needed.
>
> Does this patch fix it?
Nope, same oops.
Hm... from the boot log
ACPI: SLIT table looks invalid. Not used.
Number of logical nodes in system = 3
Number of memory chunks in system = 5
...
Virtual mem_map starts at 0xa07ffffe5a400000
Zone PFN ranges:
DMA 0x00000001 -> 0x00010000
Normal 0x00010000 -> 0x0787fc00
Movable zone start PFN for each node
early_node_map[5] active PFN ranges
2: 0x00000001 -> 0x00001ffe
0: 0x07002000 -> 0x07005db7
0: 0x07005db8 -> 0x0707fb00
1: 0x07800000 -> 0x0787fbd9
1: 0x0787fbe8 -> 0x0787fbfd
On node 0 totalpages: 514815
free_area_init_node: node 0, pgdat e000070020080000, node_mem_map a07fffffe2470000
Normal zone: 440 pages used for memmap
Normal zone: 514375 pages, LIFO batch:1
On node 1 totalpages: 523246
free_area_init_node: node 1, pgdat e000078000090080, node_mem_map a07ffffffe400000
Normal zone: 448 pages used for memmap
Normal zone: 522798 pages, LIFO batch:1
On node 2 totalpages: 8189
free_area_init_node: node 2, pgdat e000000000120100, node_mem_map a07ffffe5a400000
DMA zone: 7 pages used for memmap
DMA zone: 0 pages reserved
DMA zone: 8182 pages, LIFO batch:0
So the kernel doesn't like the SLIT; does it go off and create
its own NUMA nodes then?
/ac
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