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Subject[PATCH] x86: fix bootmem cross node for 32bit numa

Imapct: fix panic on system 2g x4 sockets

Found one system with 4 sockets and every sockets has 2g can boot with numa32
because boot mem is crossing nodes.

so try to have numa version setup_bootmem_allocator

Signed-off-by: Yinghai Lu <yinghai@kernel.org>

---
arch/x86/mm/init_32.c | 46 ++++++++++++++++++++++++++++++++++++++++------
arch/x86/mm/numa_32.c | 5 +++--
2 files changed, 43 insertions(+), 8 deletions(-)

Index: linux-2.6/arch/x86/mm/init_32.c
===================================================================
--- linux-2.6.orig/arch/x86/mm/init_32.c
+++ linux-2.6/arch/x86/mm/init_32.c
@@ -814,9 +814,37 @@ static void __init zone_sizes_init(void)
free_area_init_nodes(max_zone_pfns);
}

+#ifdef CONFIG_NEED_MULTIPLE_NODES
+static unsigned long __init setup_node_bootmem(int nodeid,
+ unsigned long start_pfn,
+ unsigned long end_pfn,
+ unsigned long bootmap)
+{
+ unsigned long bootmap_size;
+
+ if (start_pfn > max_low_pfn)
+ return bootmap;
+ if (end_pfn > max_low_pfn)
+ end_pfn = max_low_pfn;
+
+ /* don't touch min_low_pfn */
+ bootmap_size = init_bootmem_node(NODE_DATA(nodeid),
+ bootmap >> PAGE_SHIFT,
+ start_pfn, end_pfn);
+ printk(KERN_INFO " node %d low ram: %08lx - %08lx\n",
+ nodeid, start_pfn<<PAGE_SHIFT, end_pfn<<PAGE_SHIFT);
+ printk(KERN_INFO " node %d bootmap %08lx - %08lx\n",
+ nodeid, bootmap, bootmap + bootmap_size);
+ free_bootmem_with_active_regions(nodeid, end_pfn);
+ early_res_to_bootmem(start_pfn<<PAGE_SHIFT, end_pfn<<PAGE_SHIFT);
+
+ return bootmap + bootmap_size;
+}
+#endif
+
void __init setup_bootmem_allocator(void)
{
- int i;
+ int nodeid;
unsigned long bootmap_size, bootmap;
/*
* Initialize the boot-time allocator (with low memory only):
@@ -829,18 +857,24 @@ void __init setup_bootmem_allocator(void
panic("Cannot find bootmem map of size %ld\n", bootmap_size);
reserve_early(bootmap, bootmap + bootmap_size, "BOOTMAP");

- /* don't touch min_low_pfn */
- bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap >> PAGE_SHIFT,
- min_low_pfn, max_low_pfn);
printk(KERN_INFO " mapped low ram: 0 - %08lx\n",
max_pfn_mapped<<PAGE_SHIFT);
printk(KERN_INFO " low ram: %08lx - %08lx\n",
min_low_pfn<<PAGE_SHIFT, max_low_pfn<<PAGE_SHIFT);
+
+#ifdef CONFIG_NEED_MULTIPLE_NODES
+ for_each_online_node(nodeid)
+ bootmap = setup_node_bootmem(nodeid, node_start_pfn[nodeid],
+ node_end_pfn[nodeid], bootmap);
+#else
+ /* don't touch min_low_pfn */
+ bootmap_size = init_bootmem_node(NODE_DATA(0), bootmap >> PAGE_SHIFT,
+ min_low_pfn, max_low_pfn);
printk(KERN_INFO " bootmap %08lx - %08lx\n",
bootmap, bootmap + bootmap_size);
- for_each_online_node(i)
- free_bootmem_with_active_regions(i, max_low_pfn);
+ free_bootmem_with_active_regions(0, max_low_pfn);
early_res_to_bootmem(0, max_low_pfn<<PAGE_SHIFT);
+#endif

after_init_bootmem = 1;
}
Index: linux-2.6/arch/x86/mm/numa_32.c
===================================================================
--- linux-2.6.orig/arch/x86/mm/numa_32.c
+++ linux-2.6/arch/x86/mm/numa_32.c
@@ -416,10 +416,11 @@ void __init initmem_init(unsigned long s
for_each_online_node(nid)
propagate_e820_map_node(nid);

- for_each_online_node(nid)
+ for_each_online_node(nid) {
memset(NODE_DATA(nid), 0, sizeof(struct pglist_data));
+ NODE_DATA(nid)->bdata = &bootmem_node_data[nid];
+ }

- NODE_DATA(0)->bdata = &bootmem_node_data[0];
setup_bootmem_allocator();
}


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