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 <[EMAIL PROTECTED]>
Acked-by: Siddha, Suresh <[EMAIL PROTECTED]>
---
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)
-
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