On Sun, 17 Feb 2008, Yinghai Lu wrote:
Applied. Thanks,
tglx
>
> 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
>
> the
> Could not find start_pfn for node 0
> should not there, because node 0 is not online.
>
> in mm/page_alloc.c
>
> /*
> * Array of node states.
> */
> nodemask_t node_states[NR_NODE_STATES] __read_mostly = {
> [N_POSSIBLE] = NODE_MASK_ALL,
> [N_ONLINE] = { { [0] = 1UL } },
> #ifndef CONFIG_NUMA
> [N_NORMAL_MEMORY] = { { [0] = 1UL } },
> #ifdef CONFIG_HIGHMEM
> [N_HIGH_MEMORY] = { { [0] = 1UL } },
> #endif
> [N_CPU] = { { [0] = 1UL } },
> #endif /* NUMA */
> };
> EXPORT_SYMBOL(node_states);
>
> this patch will clear node_online_map at first.
>
> Signed-off-by: Yinghai Lu <[EMAIL PROTECTED]>
>
> diff --git a/arch/x86/mm/numa_64.c b/arch/x86/mm/numa_64.c
> index 1aecc65..59898fb 100644
> --- a/arch/x86/mm/numa_64.c
> +++ b/arch/x86/mm/numa_64.c
> @@ -494,11 +494,13 @@ void __init numa_initmem_init(unsigned long start_pfn,
> unsigned long end_pfn)
> int i;
>
> nodes_clear(node_possible_map);
> + nodes_clear(node_online_map);
>
> #ifdef CONFIG_NUMA_EMU
> if (cmdline && !numa_emulation(start_pfn, end_pfn))
> return;
> nodes_clear(node_possible_map);
> + nodes_clear(node_online_map);
> #endif
>
> #ifdef CONFIG_ACPI_NUMA
> @@ -506,6 +508,7 @@ void __init numa_initmem_init(unsigned long start_pfn,
> unsigned long end_pfn)
> end_pfn << PAGE_SHIFT))
> return;
> nodes_clear(node_possible_map);
> + nodes_clear(node_online_map);
> #endif
>
> #ifdef CONFIG_K8_NUMA
> @@ -513,6 +516,7 @@ void __init numa_initmem_init(unsigned long start_pfn,
> unsigned long end_pfn)
> end_pfn<<PAGE_SHIFT))
> return;
> nodes_clear(node_possible_map);
> + nodes_clear(node_online_map);
> #endif
> printk(KERN_INFO "%s\n",
> numa_off ? "NUMA turned off" : "No NUMA configuration found");
> @@ -524,7 +528,6 @@ void __init numa_initmem_init(unsigned long start_pfn,
> unsigned long end_pfn)
> memnode_shift = 63;
> memnodemap = memnode.embedded_map;
> memnodemap[0] = 0;
> - nodes_clear(node_online_map);
> node_set_online(0);
> node_set(0, node_possible_map);
> for (i = 0; i < NR_CPUS; i++)
> --
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