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[PATCH] x86_64: Try to allocate node memmap near the end of node

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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>
This commit is contained in:
Andi Kleen 2006-03-25 16:31:10 +01:00 committed by Linus Torvalds
parent bd66334769
commit 267b48014a
3 changed files with 15 additions and 2 deletions
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12
arch/x86_64/mm/numa.c
View file

@ -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);

3
include/linux/bootmem.h
View file

@ -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) \

2
mm/bootmem.c
View file

@ -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)
{