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authorZou Nan hai <nanhai.zou@intel.com>2007-06-01 11:46:28 +0400
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-06-01 19:18:27 +0400
commit2e1c49db4c640b35df13889b86b9d62215ade4b6 (patch)
tree8b886843a57f5ff683700a9f623294e3f24d07ef
parentfa0aa866c82e441787e07169cb4925e3b673e891 (diff)
downloadlinux-2e1c49db4c640b35df13889b86b9d62215ade4b6.tar.xz
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>
-rw-r--r--arch/x86_64/mm/init.c6
-rw-r--r--include/linux/bootmem.h1
-rw-r--r--mm/sparse.c11
3 files changed, 18 insertions, 0 deletions
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);
+}
diff --git a/include/linux/bootmem.h b/include/linux/bootmem.h
index 0365ec9fc0c9..c83534ee1e79 100644
--- a/include/linux/bootmem.h
+++ b/include/linux/bootmem.h
@@ -59,6 +59,7 @@ extern void *__alloc_bootmem_core(struct bootmem_data *bdata,
unsigned long align,
unsigned long goal,
unsigned long limit);
+extern void *alloc_bootmem_high_node(pg_data_t *pgdat, unsigned long size);
#ifndef CONFIG_HAVE_ARCH_BOOTMEM_NODE
extern void reserve_bootmem(unsigned long addr, unsigned long size);
diff --git a/mm/sparse.c b/mm/sparse.c
index 1302f8348d51..545e4d3afcdf 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -209,6 +209,12 @@ static int __meminit sparse_init_one_section(struct mem_section *ms,
return 1;
}
+__attribute__((weak))
+void *alloc_bootmem_high_node(pg_data_t *pgdat, unsigned long size)
+{
+ return NULL;
+}
+
static struct page __init *sparse_early_mem_map_alloc(unsigned long pnum)
{
struct page *map;
@@ -219,6 +225,11 @@ static struct page __init *sparse_early_mem_map_alloc(unsigned long pnum)
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)