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authorYinghai Lu <yinghai@kernel.org>2012-07-11 14:02:53 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-07-11 16:04:49 -0700
commit99ab7b19440a72ebdf225f99b20f8ef40decee86 (patch)
tree74ac6a77d44e5ee0657456c1335ec74edd5c3d0e /mm/bootmem.c
parent07b4e2bc9c35ea88cbd36d806fcd5e3bcbf022be (diff)
downloadlinux-99ab7b19440a72ebdf225f99b20f8ef40decee86.tar.gz
mm: sparse: fix usemap allocation above node descriptor section
After commit f5bf18fa22f8 ("bootmem/sparsemem: remove limit constraint in alloc_bootmem_section"), usemap allocations may easily be placed outside the optimal section that holds the node descriptor, even if there is space available in that section. This results in unnecessary hotplug dependencies that need to have the node unplugged before the section holding the usemap. The reason is that the bootmem allocator doesn't guarantee a linear search starting from the passed allocation goal but may start out at a much higher address absent an upper limit. Fix this by trying the allocation with the limit at the section end, then retry without if that fails. This keeps the fix from f5bf18fa22f8 of not panicking if the allocation does not fit in the section, but still makes sure to try to stay within the section at first. Signed-off-by: Yinghai Lu <yinghai@kernel.org> Signed-off-by: Johannes Weiner <hannes@cmpxchg.org> Cc: <stable@vger.kernel.org> [3.3.x, 3.4.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/bootmem.c')
-rw-r--r--mm/bootmem.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/bootmem.c b/mm/bootmem.c
index ec4fcb7a56c..73096630cb3 100644
--- a/mm/bootmem.c
+++ b/mm/bootmem.c
@@ -698,7 +698,7 @@ void * __init __alloc_bootmem(unsigned long size, unsigned long align,
return ___alloc_bootmem(size, align, goal, limit);
}
-static void * __init ___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
+void * __init ___alloc_bootmem_node_nopanic(pg_data_t *pgdat,
unsigned long size, unsigned long align,
unsigned long goal, unsigned long limit)
{