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authorAndi Kleen <ak@suse.de>2006-03-25 16:31:10 +0100
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-25 09:10:56 -0800
commit267b48014a5c0c2ae90b04dad5d95ceb903365a6 (patch)
tree95f5475b7b7f6e5b4fd023f51fb2fa826d95a754 /arch
parentbd6633476922b7b51227f7f704c2546e763ae5ed (diff)
downloadop-kernel-dev-267b48014a5c0c2ae90b04dad5d95ceb903365a6.zip
op-kernel-dev-267b48014a5c0c2ae90b04dad5d95ceb903365a6.tar.gz
[PATCH] x86_64: Try to allocate node memmap near the end of node
This fixes problems with very large nodes (over 128GB) filling up all of the first 4GB with their mem_map and not leaving enough space for the swiotlb. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86_64/mm/numa.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/x86_64/mm/numa.c b/arch/x86_64/mm/numa.c
index e4b6275..07471a3 100644
--- a/arch/x86_64/mm/numa.c
+++ b/arch/x86_64/mm/numa.c
@@ -149,7 +149,7 @@ void __init setup_node_bootmem(int nodeid, unsigned long start, unsigned long en
/* Initialize final allocator for a zone */
void __init setup_node_zones(int nodeid)
{
- unsigned long start_pfn, end_pfn;
+ unsigned long start_pfn, end_pfn, memmapsize, limit;
unsigned long zones[MAX_NR_ZONES];
unsigned long holes[MAX_NR_ZONES];
@@ -159,6 +159,16 @@ void __init setup_node_zones(int nodeid)
Dprintk(KERN_INFO "Setting up node %d %lx-%lx\n",
nodeid, start_pfn, end_pfn);
+ /* Try to allocate mem_map at end to not fill up precious <4GB
+ memory. */
+ memmapsize = sizeof(struct page) * (end_pfn-start_pfn);
+ limit = end_pfn << PAGE_SHIFT;
+ NODE_DATA(nodeid)->node_mem_map =
+ __alloc_bootmem_core(NODE_DATA(nodeid)->bdata,
+ memmapsize, SMP_CACHE_BYTES,
+ round_down(limit - memmapsize, PAGE_SIZE),
+ limit);
+
size_zones(zones, holes, start_pfn, end_pfn);
free_area_init_node(nodeid, NODE_DATA(nodeid), zones,
start_pfn, holes);
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