From 2e1c49db4c640b35df13889b86b9d62215ade4b6 Mon Sep 17 00:00:00 2001 From: Zou Nan hai Date: Fri, 1 Jun 2007 00:46:28 -0700 Subject: x86_64: allocate sparsemem memmap above 4G On systems with huge amount of physical memory, VFS cache and memory memmap may eat all available system memory under 4G, then the system may fail to allocate swiotlb bounce buffer. There was a fix for this issue in arch/x86_64/mm/numa.c, but that fix dose not cover sparsemem model. This patch add fix to sparsemem model by first try to allocate memmap above 4G. Signed-off-by: Zou Nan hai Acked-by: Suresh Siddha Cc: Andi Kleen Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/x86_64/mm/init.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'arch/x86_64') diff --git a/arch/x86_64/mm/init.c b/arch/x86_64/mm/init.c index 1336da8bdee1..1ad5111aec38 100644 --- a/arch/x86_64/mm/init.c +++ b/arch/x86_64/mm/init.c @@ -761,3 +761,9 @@ int in_gate_area_no_task(unsigned long addr) { return (addr >= VSYSCALL_START) && (addr < VSYSCALL_END); } + +void *alloc_bootmem_high_node(pg_data_t *pgdat, unsigned long size) +{ + return __alloc_bootmem_core(pgdat->bdata, size, + SMP_CACHE_BYTES, (4UL*1024*1024*1024), 0); +} -- cgit v1.2.2