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authorDavid Miller <davem@davemloft.net>2012-04-25 16:10:50 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2012-04-25 21:18:01 -0700
commit4e1c2b284461fd8aa8d7b295a1e911fc4390755b (patch)
treef51ab604d23af8ac0f6087516f877af5604c3477
parentaf3a3ab2966112c0d0a44df7eeb1e95fe32d4495 (diff)
downloadop-kernel-dev-4e1c2b284461fd8aa8d7b295a1e911fc4390755b.zip
op-kernel-dev-4e1c2b284461fd8aa8d7b295a1e911fc4390755b.tar.gz
mm: nobootmem: Correct alloc_bootmem semantics.
The comments above __alloc_bootmem_node() claim that the code will first try the allocation using 'goal' and if that fails it will try again but with the 'goal' requirement dropped. Unfortunately, this is not what the code does, so fix it to do so. This is important for nobootmem conversions to architectures such as sparc where MAX_DMA_ADDRESS is infinity. On such architectures all of the allocations done by generic spots, such as the sparse-vmemmap implementation, will pass in: __pa(MAX_DMA_ADDRESS) as the goal, and with the limit given as "-1" this will always fail unless we add the appropriate fallback logic here. Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--mm/nobootmem.c10
1 files changed, 8 insertions, 2 deletions
diff --git a/mm/nobootmem.c b/mm/nobootmem.c
index 24f0fc1..e53bb8a 100644
--- a/mm/nobootmem.c
+++ b/mm/nobootmem.c
@@ -298,13 +298,19 @@ void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
if (WARN_ON_ONCE(slab_is_available()))
return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
+again:
ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
goal, -1ULL);
if (ptr)
return ptr;
- return __alloc_memory_core_early(MAX_NUMNODES, size, align,
- goal, -1ULL);
+ ptr = __alloc_memory_core_early(MAX_NUMNODES, size, align,
+ goal, -1ULL);
+ if (!ptr && goal) {
+ goal = 0;
+ goto again;
+ }
+ return ptr;
}
void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size,
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