diff options
| author | Andi Kleen <ak@suse.de> | 2006-03-25 16:31:10 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-25 09:10:56 -0800 |
| commit | 267b48014a5c0c2ae90b04dad5d95ceb903365a6 (patch) | |
| tree | 95f5475b7b7f6e5b4fd023f51fb2fa826d95a754 | |
| parent | bd6633476922b7b51227f7f704c2546e763ae5ed (diff) | |
| download | op-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>
| -rw-r--r-- | arch/x86_64/mm/numa.c | 12 | ||||
| -rw-r--r-- | include/linux/bootmem.h | 3 | ||||
| -rw-r--r-- | mm/bootmem.c | 2 |
3 files changed, 15 insertions, 2 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); diff --git a/include/linux/bootmem.h b/include/linux/bootmem.h index 993da8c..7155452 100644 --- a/include/linux/bootmem.h +++ b/include/linux/bootmem.h @@ -51,6 +51,9 @@ extern void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size, unsigned long align, unsigned long goal); +extern void * __init __alloc_bootmem_core(struct bootmem_data *bdata, + unsigned long size, unsigned long align, unsigned long goal, + unsigned long limit); #ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE extern void __init reserve_bootmem (unsigned long addr, unsigned long size); #define alloc_bootmem(x) \ diff --git a/mm/bootmem.c b/mm/bootmem.c index 35c3229..b55bd39 100644 --- a/mm/bootmem.c +++ b/mm/bootmem.c @@ -152,7 +152,7 @@ static void __init free_bootmem_core(bootmem_data_t *bdata, unsigned long addr, * * NOTE: This function is _not_ reentrant. */ -static void * __init +void * __init __alloc_bootmem_core(struct bootmem_data *bdata, unsigned long size, unsigned long align, unsigned long goal, unsigned long limit) { |
