Messages in this thread Patch in this message | | | Subject | [Patch] Allocate sparsemem memmap above 4G on X86_64 | From | Zou Nan hai <> | Date | 17 May 2007 10:40:07 +0800 |
| |
On system with huge amount of physical memory. VFS cache and memory memmap may eat all available system memory under 4G, then system may fail to allocated swiotlb bounce buffer.
There was a fix in arch/x86_64/mm/numa.c, but that fix does not cover sparsemem model. This patch add fix to sparsemem model.
Signed-off-by: Zou Nan hai <nanhai.zou@intel.com> Acked-by: Siddha, Suresh <suresh.b.siddha@intel.com> --- include/asm-x86_64/mmzone.h | 5 +++++ include/linux/bootmem.h | 3 +++ mm/sparse.c | 5 +++++ 3 files changed, 13 insertions(+)
diff -Nraup a/include/asm-x86_64/mmzone.h b/include/asm-x86_64/mmzone.h --- a/include/asm-x86_64/mmzone.h 2007-05-17 09:38:02.000000000 +0800 +++ b/include/asm-x86_64/mmzone.h 2007-05-17 09:54:10.000000000 +0800 @@ -52,5 +52,10 @@ extern int pfn_valid(unsigned long pfn); #define FAKE_NODE_MIN_HASH_MASK (~(FAKE_NODE_MIN_SIZE - 1uL)) #endif +#define ARCH_HAS_ALLOC_BOOTMEM_HIGH_NODE 1 +#define alloc_bootmem_high_node(pgdat,size) \ +({__alloc_bootmem_core(pgdat->bdata, size, SMP_CACHE_BYTES, (4UL*1024*1024*1024), 0);}) + + #endif #endif diff -Nraup a/include/linux/bootmem.h b/include/linux/bootmem.h --- a/include/linux/bootmem.h 2007-05-17 09:38:02.000000000 +0800 +++ b/include/linux/bootmem.h 2007-05-17 09:37:00.000000000 +0800 @@ -131,5 +131,8 @@ extern void *alloc_large_system_hash(con #endif extern int hashdist; /* Distribute hashes across NUMA nodes? */ +#ifndef ARCH_HAS_ALLOC_BOOTMEM_HIGH_NODE +#define alloc_bootmem_high_node(pgdat, size) ({NULL;}) +#endif #endif /* _LINUX_BOOTMEM_H */ diff -Nraup a/mm/sparse.c b/mm/sparse.c --- a/mm/sparse.c 2007-05-17 09:38:03.000000000 +0800 +++ b/mm/sparse.c 2007-05-17 09:54:27.000000000 +0800 @@ -219,6 +219,11 @@ static struct page __init *sparse_early_ if (map) return map; + map = alloc_bootmem_high_node(NODE_DATA(nid), + sizeof(struct page) * PAGES_PER_SECTION); + if (map) + return map; + map = alloc_bootmem_node(NODE_DATA(nid), sizeof(struct page) * PAGES_PER_SECTION); if (map)
- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
| |