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linux/arch/x86/mm
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Yinghai Lu b7ad149d62 x86: reenable support for system without on node0 
One system doesn't have RAM for node0 installed.

SRAT: PXM 0 -> APIC 0 -> Node 0
SRAT: PXM 0 -> APIC 1 -> Node 0
SRAT: PXM 1 -> APIC 2 -> Node 1
SRAT: PXM 1 -> APIC 3 -> Node 1
SRAT: Node 1 PXM 1 0-a0000
SRAT: Node 1 PXM 1 0-dd000000
SRAT: Node 1 PXM 1 0-123000000
ACPI: SLIT: nodes = 2
 10 13
 13 10
mapped APIC to ffffffffff5fb000 (        fee00000)
Bootmem setup node 1 0000000000000000-0000000123000000
  NODE_DATA [000000000000e000 - 0000000000014fff]
  bootmap [0000000000015000 -  00000000000395ff] pages 25
Could not find start_pfn for node 0
Pid: 0, comm: swapper Not tainted 2.6.24-smp-g5a514e21-dirty #14

Call Trace:
 [<ffffffff80bab498>] free_area_init_node+0x22/0x381
 [<ffffffff8045ffc5>] generic_swap+0x0/0x17
 [<ffffffff80bab0cc>] find_zone_movable_pfns_for_nodes+0x54/0x271
 [<ffffffff80baba5f>] free_area_init_nodes+0x239/0x287
 [<ffffffff80ba6311>] paging_init+0x46/0x4c
 [<ffffffff80b9dda5>] setup_arch+0x3c3/0x44e
 [<ffffffff80b978be>] start_kernel+0x6f/0x2c7
 [<ffffffff80b971cc>] _sinittext+0x1cc/0x1d3

This happens because node 0 is not online, but the node state in
mm/page_alloc.c has node 0 set.

        nodemask_t node_states[NR_NODE_STATES] __read_mostly = {
                [N_POSSIBLE] = NODE_MASK_ALL,
                [N_ONLINE] = { { [0] = 1UL } },

So we need to clear node_online_map before initializing the memory.

Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-02-18 20:54:14 +01:00
..
discontig_32.c Introduce flags for reserve_bootmem() 2008-02-07 08:42:25 -08:00
extable.c x86: unify extable_{32|64}.c 2008-01-30 13:31:41 +01:00
fault.c x86: make dump_pagetable() static 2008-02-14 23:30:19 +01:00
highmem_32.c x86: kmap_atomic() debugging 2008-01-30 13:30:47 +01:00
hugetlbpage.c x86: demacro asm-x86/pgalloc_32.h 2008-01-30 13:33:39 +01:00
init_32.c x86: include proper prototypes for rodata_test 2008-02-14 23:30:20 +01:00
init_64.c x86: zap invalid and unused pmds in early boot 2008-02-18 20:54:14 +01:00
ioremap.c x86/early_ioremap: don't assume we're using swapper_pg_dir 2008-02-13 16:20:35 +01:00
k8topology_64.c x86: add PCI IDs to k8topology_64.c 2008-01-30 13:34:12 +01:00
Makefile x86_64: move mm 2007-10-11 11:17:18 +02:00
Makefile_32 x86: unify fault_32|64.c 2008-01-30 13:34:11 +01:00
Makefile_64 x86: unify fault_32|64.c 2008-01-30 13:34:11 +01:00
mmap.c x86: unify mmap_{32|64}.c 2008-01-30 13:31:10 +01:00
numa_64.c x86: reenable support for system without on node0 2008-02-18 20:54:14 +01:00
pageattr-test.c x86: remove over noisy debug printk 2008-02-11 11:24:24 -08:00
pageattr.c x86: CPA: avoid double checking of alias ranges 2008-02-18 20:54:14 +01:00
pgtable_32.c CONFIG_HIGHPTE vs. sub-page page tables. 2008-02-08 09:22:42 -08:00
srat_64.c Introduce flags for reserve_bootmem() 2008-02-07 08:42:25 -08:00