The patch titled
x86,nobootmem: make alloc_bootmem_node fall back to other node when 32bit numa is used
has been added to the -mm tree. Its filename is
x86nobootmem-make-alloc_bootmem_node-fall-back-to-other-node-when-32bit-numa-is-used.patch
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out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: x86,nobootmem: make alloc_bootmem_node fall back to other node when 32bit numa is used
From: Yinghai Lu <yinghai@xxxxxxxxxx>
Borislav Petkov reported his 32bit numa system has problem:
[ 0.000000] Reserving total of 4c00 pages for numa KVA remap
[ 0.000000] kva_start_pfn ~ 32800 max_low_pfn ~ 375fe
[ 0.000000] max_pfn = 238000
[ 0.000000] 8202MB HIGHMEM available.
[ 0.000000] 885MB LOWMEM available.
[ 0.000000] mapped low ram: 0 - 375fe000
[ 0.000000] low ram: 0 - 375fe000
[ 0.000000] alloc (nid=8 100000 - 7ee00000) (1000000 - ffffffff) 1000 1000 => 34e7000
[ 0.000000] alloc (nid=8 100000 - 7ee00000) (1000000 - ffffffff) 200 40 => 34c9d80
[ 0.000000] alloc (nid=0 100000 - 7ee00000) (1000000 - ffffffffffffffff) 180 40 => 34e6140
[ 0.000000] alloc (nid=1 80000000 - c7e60000) (1000000 - ffffffffffffffff) 240 40 => 80000000
[ 0.000000] BUG: unable to handle kernel paging request at 40000000
[ 0.000000] IP: [<c2c8cff1>] __alloc_memory_core_early+0x147/0x1d6
[ 0.000000] *pdpt = 0000000000000000 *pde = f000ff53f000ff00
...
[ 0.000000] Call Trace:
[ 0.000000] [<c2c8b4f8>] ? __alloc_bootmem_node+0x216/0x22f
[ 0.000000] [<c2c90c9b>] ? sparse_early_usemaps_alloc_node+0x5a/0x10b
[ 0.000000] [<c2c9149e>] ? sparse_init+0x1dc/0x499
[ 0.000000] [<c2c79118>] ? paging_init+0x168/0x1df
[ 0.000000] [<c2c780ff>] ? native_pagetable_setup_start+0xef/0x1bb
looks like it allocate much high address for bootmem.
Try to cut limit with get_max_mapped()
Reported-by: Borislav Petkov <borislav.petkov@xxxxxxx>
Tested-by: Conny Seidel <conny.seidel@xxxxxxx>
Signed-off-by: Yinghai Lu <yinghai@xxxxxxxxxx>
Cc: <stable@xxxxxxxxxx> [2.6.34.x]
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: "H. Peter Anvin" <hpa@xxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Johannes Weiner <hannes@xxxxxxxxxxx>
Cc: Lee Schermerhorn <lee.schermerhorn@xxxxxx>
Cc: Mel Gorman <mel@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/bootmem.c | 24 ++++++++++++++++++++----
mm/page_alloc.c | 3 +++
2 files changed, 23 insertions(+), 4 deletions(-)
diff -puN mm/bootmem.c~x86nobootmem-make-alloc_bootmem_node-fall-back-to-other-node-when-32bit-numa-is-used mm/bootmem.c
--- a/mm/bootmem.c~x86nobootmem-make-alloc_bootmem_node-fall-back-to-other-node-when-32bit-numa-is-used
+++ a/mm/bootmem.c
@@ -833,15 +833,24 @@ static void * __init ___alloc_bootmem_no
void * __init __alloc_bootmem_node(pg_data_t *pgdat, unsigned long size,
unsigned long align, unsigned long goal)
{
+ void *ptr;
+
if (WARN_ON_ONCE(slab_is_available()))
return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
#ifdef CONFIG_NO_BOOTMEM
- return __alloc_memory_core_early(pgdat->node_id, size, align,
+ ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
+ goal, -1ULL);
+ if (ptr)
+ return ptr;
+
+ ptr = __alloc_memory_core_early(MAX_NUMNODES, size, align,
goal, -1ULL);
#else
- return ___alloc_bootmem_node(pgdat->bdata, size, align, goal, 0);
+ ptr = ___alloc_bootmem_node(pgdat->bdata, size, align, goal, 0);
#endif
+
+ return ptr;
}
void * __init __alloc_bootmem_node_high(pg_data_t *pgdat, unsigned long size,
@@ -977,14 +986,21 @@ void * __init __alloc_bootmem_low(unsign
void * __init __alloc_bootmem_low_node(pg_data_t *pgdat, unsigned long size,
unsigned long align, unsigned long goal)
{
+ void *ptr;
+
if (WARN_ON_ONCE(slab_is_available()))
return kzalloc_node(size, GFP_NOWAIT, pgdat->node_id);
#ifdef CONFIG_NO_BOOTMEM
- return __alloc_memory_core_early(pgdat->node_id, size, align,
+ ptr = __alloc_memory_core_early(pgdat->node_id, size, align,
+ goal, ARCH_LOW_ADDRESS_LIMIT);
+ if (ptr)
+ return ptr;
+ ptr = __alloc_memory_core_early(MAX_NUMNODES, size, align,
goal, ARCH_LOW_ADDRESS_LIMIT);
#else
- return ___alloc_bootmem_node(pgdat->bdata, size, align,
+ ptr = ___alloc_bootmem_node(pgdat->bdata, size, align,
goal, ARCH_LOW_ADDRESS_LIMIT);
#endif
+ return ptr;
}
diff -puN mm/page_alloc.c~x86nobootmem-make-alloc_bootmem_node-fall-back-to-other-node-when-32bit-numa-is-used mm/page_alloc.c
--- a/mm/page_alloc.c~x86nobootmem-make-alloc_bootmem_node-fall-back-to-other-node-when-32bit-numa-is-used
+++ a/mm/page_alloc.c
@@ -3634,6 +3634,9 @@ void * __init __alloc_memory_core_early(
int i;
void *ptr;
+ if (limit > get_max_mapped())
+ limit = get_max_mapped();
+
/* need to go over early_node_map to find out good range for node */
for_each_active_range_index_in_nid(i, nid) {
u64 addr;
_
Patches currently in -mm which might be from yinghai@xxxxxxxxxx are
x86-numa-fix-boot-without-ram-on-node0-again.patch
x86-numa-fix-boot-without-ram-on-node0-again-fix.patch
linux-next.patch
x86nobootmem-make-alloc_bootmem_node-fall-back-to-other-node-when-32bit-numa-is-used.patch
kernel-range-remove-unused-definition-of-array_size.patch
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