path: root/arch/x86_64
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authorZou Nan hai <nanhai.zou@intel.com>2007-06-01 00:46:28 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-06-01 08:18:27 -0700
commit2e1c49db4c640b35df13889b86b9d62215ade4b6 (patch)
tree8b886843a57f5ff683700a9f623294e3f24d07ef /arch/x86_64
parentfa0aa866c82e441787e07169cb4925e3b673e891 (diff)
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 <nanhai.zou@intel.com> Acked-by: Suresh Siddha <suresh.b.siddha@intel.com> Cc: Andi Kleen <ak@suse.de> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/x86_64')
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86_64/mm/init.c b/arch/x86_64/mm/init.c
index 1336da8bdee..1ad5111aec3 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);