Hello Borislav,
On Wed, Aug 01, 2012 at 07:38:37PM +0200, Borislav Petkov wrote:
> Hi,
>
> I'm hitting the WARN_ON in $Subject with latest linus:
> v3.5-8833-g2d534926205d on a 4-node AMD system. As it looks from
> dmesg, it is happening on node 0, 1 and 2 but not on 3. Probably the
> pgdat->nr_zones thing but I'll have to add more dbg code to be sure.
As I look the code quickly, free_area_init_node initializes node_id and
node_start_pfn doublely. They were initialized by setup_node_data.
Could you test below patch? It's not a totally right way to fix it but
I want to confirm why it happens.
(I'm on vacation now so please understand that it hard to reach me)
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 889532b..009ac28 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -4511,7 +4511,7 @@ void __paginginit free_area_init_node(int nid, unsigned long *zones_size,
pg_data_t *pgdat = NODE_DATA(nid);
/* pg_data_t should be reset to zero when it's allocated */
- WARN_ON(pgdat->nr_zones || pgdat->node_start_pfn || pgdat->classzone_idx);
+ WARN_ON(pgdat->nr_zones || pgdat->classzone_idx);
pgdat->node_id = nid;
pgdat->node_start_pfn = node_start_pfn;
>
> Config is attached.
>
> dmesg:
>
> [ 0.000000] Early memory node ranges
> [ 0.000000] node 0: [mem 0x00010000-0x00087fff]
> [ 0.000000] node 0: [mem 0x00100000-0xc7ebffff]
> [ 0.000000] node 0: [mem 0x100000000-0x437ffffff]
> [ 0.000000] node 1: [mem 0x438000000-0x837ffffff]
> [ 0.000000] node 2: [mem 0x838000000-0xc37ffffff]
> [ 0.000000] node 3: [mem 0xc38000000-0x1037ffffff]
> [ 0.000000] On node 0 totalpages: 4193848
> [ 0.000000] DMA zone: 64 pages used for memmap
> [ 0.000000] DMA zone: 6 pages reserved
> [ 0.000000] DMA zone: 3890 pages, LIFO batch:0
> [ 0.000000] DMA32 zone: 16320 pages used for memmap
> [ 0.000000] DMA32 zone: 798464 pages, LIFO batch:31
> [ 0.000000] Normal zone: 52736 pages used for memmap
> [ 0.000000] Normal zone: 3322368 pages, LIFO batch:31
> [ 0.000000] ------------[ cut here ]------------
> [ 0.000000] WARNING: at mm/page_alloc.c:4514 free_area_init_node+0x4f/0x37b()
> [ 0.000000] Hardware name: Dinar
> [ 0.000000] Modules linked in:
> [ 0.000000] Pid: 0, comm: swapper Not tainted 3.5.0+ #9
> [ 0.000000] Call Trace:
> [ 0.000000] [<ffffffff810320bd>] warn_slowpath_common+0x85/0x9d
> [ 0.000000] [<ffffffff810320ef>] warn_slowpath_null+0x1a/0x1c
> [ 0.000000] [<ffffffff81470bc0>] free_area_init_node+0x4f/0x37b
> [ 0.000000] [<ffffffff81af5962>] ? find_min_pfn_for_node+0x57/0x84
> [ 0.000000] [<ffffffff81af61a2>] free_area_init_nodes+0x55d/0x5ac
> [ 0.000000] [<ffffffff81aed7ca>] zone_sizes_init+0x3b/0x3d
> [ 0.000000] [<ffffffff81aedadc>] paging_init+0x20/0x22
> [ 0.000000] [<ffffffff81ae030d>] setup_arch+0x6f3/0x7c2
> [ 0.000000] [<ffffffff81add806>] start_kernel+0x8f/0x2eb
> [ 0.000000] [<ffffffff81add280>] x86_64_start_reservations+0x84/0x89
> [ 0.000000] [<ffffffff81add377>] x86_64_start_kernel+0xf2/0xf9
> [ 0.000000] ---[ end trace d76bed13a5793ee3 ]---
> [ 0.000000] On node 1 totalpages: 4194304
> [ 0.000000] Normal zone: 65536 pages used for memmap
> [ 0.000000] Normal zone: 4128768 pages, LIFO batch:31
> [ 0.000000] ------------[ cut here ]------------
> [ 0.000000] WARNING: at mm/page_alloc.c:4514 free_area_init_node+0x4f/0x37b()
> [ 0.000000] Hardware name: Dinar
> [ 0.000000] Modules linked in:
> [ 0.000000] Pid: 0, comm: swapper Tainted: G W 3.5.0+ #9
> [ 0.000000] Call Trace:
> [ 0.000000] [<ffffffff810320bd>] warn_slowpath_common+0x85/0x9d
> [ 0.000000] [<ffffffff810320ef>] warn_slowpath_null+0x1a/0x1c
> [ 0.000000] [<ffffffff81470bc0>] free_area_init_node+0x4f/0x37b
> [ 0.000000] [<ffffffff81af5962>] ? find_min_pfn_for_node+0x57/0x84
> [ 0.000000] [<ffffffff81af61a2>] free_area_init_nodes+0x55d/0x5ac
> [ 0.000000] [<ffffffff81aed7ca>] zone_sizes_init+0x3b/0x3d
> [ 0.000000] [<ffffffff81aedadc>] paging_init+0x20/0x22
> [ 0.000000] [<ffffffff81ae030d>] setup_arch+0x6f3/0x7c2
> [ 0.000000] [<ffffffff81add806>] start_kernel+0x8f/0x2eb
> [ 0.000000] [<ffffffff81add280>] x86_64_start_reservations+0x84/0x89
> [ 0.000000] [<ffffffff81add377>] x86_64_start_kernel+0xf2/0xf9
> [ 0.000000] ---[ end trace d76bed13a5793ee4 ]---
> [ 0.000000] On node 2 totalpages: 4194304
> [ 0.000000] Normal zone: 65536 pages used for memmap
> [ 0.000000] Normal zone: 4128768 pages, LIFO batch:31
> [ 0.000000] ------------[ cut here ]------------
> [ 0.000000] WARNING: at mm/page_alloc.c:4514 free_area_init_node+0x4f/0x37b()
> [ 0.000000] Hardware name: Dinar
> [ 0.000000] Modules linked in:
> [ 0.000000] Pid: 0, comm: swapper Tainted: G W 3.5.0+ #9
> [ 0.000000] Call Trace:
> [ 0.000000] [<ffffffff810320bd>] warn_slowpath_common+0x85/0x9d
> [ 0.000000] [<ffffffff810320ef>] warn_slowpath_null+0x1a/0x1c
> [ 0.000000] [<ffffffff81470bc0>] free_area_init_node+0x4f/0x37b
> [ 0.000000] [<ffffffff81af5962>] ? find_min_pfn_for_node+0x57/0x84
> [ 0.000000] [<ffffffff81af61a2>] free_area_init_nodes+0x55d/0x5ac
> [ 0.000000] [<ffffffff81aed7ca>] zone_sizes_init+0x3b/0x3d
> [ 0.000000] [<ffffffff81aedadc>] paging_init+0x20/0x22
> [ 0.000000] [<ffffffff81ae030d>] setup_arch+0x6f3/0x7c2
> [ 0.000000] [<ffffffff81add806>] start_kernel+0x8f/0x2eb
> [ 0.000000] [<ffffffff81add280>] x86_64_start_reservations+0x84/0x89
> [ 0.000000] [<ffffffff81add377>] x86_64_start_kernel+0xf2/0xf9
> [ 0.000000] ---[ end trace d76bed13a5793ee5 ]---
> [ 0.000000] On node 3 totalpages: 4194304
> [ 0.000000] Normal zone: 65536 pages used for memmap
> [ 0.000000] Normal zone: 4128768 pages, LIFO batch:31
>
> --
> Regards/Gruss,
> Boris.
>
> Advanced Micro Devices GmbH
> Einsteinring 24, 85609 Dornach
> GM: Alberto Bozzo
> Reg: Dornach, Landkreis Muenchen
> HRB Nr. 43632 WEEE Registernr: 129 19551
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