* Russ Anderson <rja@xxxxxxx> wrote:
> Booting with 32 TBytes memory hits BUG at mm/page_alloc.c:552! (output below).
>
> The key hint is "page 4294967296 outside zone".
> 4294967296 = 0x100000000 (bit 32 is set).
>
> The problem is in include/linux/mmzone.h:
>
> 530 static inline unsigned zone_end_pfn(const struct zone *zone)
> 531 {
> 532 return zone->zone_start_pfn + zone->spanned_pages;
> 533 }
>
> zone_end_pfn is "unsigned" (32 bits). Changing it to
> "unsigned long" (64 bits) fixes the problem.
>
> zone_end_pfn() was added recently in commit 108bcc96ef7047c02cad4d229f04da38186a3f3f.
> http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/include/linux/mmzone.h?id=108bcc96ef7047c02cad4d229f04da38186a3f3f
>
>
> Output from the failure.
>
> No AGP bridge found
> page 4294967296 outside zone [ 4294967296 - 4327469056 ]
> ------------[ cut here ]------------
> kernel BUG at mm/page_alloc.c:552!
> invalid opcode: 0000 [#1] SMP
> Modules linked in:
> CPU 0
> Pid: 0, comm: swapper Not tainted 3.9.0-rc2.dtp+ #10
> RIP: 0010:[<ffffffff811477d2>] [<ffffffff811477d2>] free_one_page+0x382/0x430
> RSP: 0000:ffffffff81943d98 EFLAGS: 00010002
> RAX: 0000000000000001 RBX: ffffea4000000000 RCX: 000000000000b3d9
> RDX: 0000000000000000 RSI: 0000000000000086 RDI: 0000000000000046
> RBP: ffffffff81943df8 R08: 0000000000000040 R09: 0000000000000023
> R10: 00000000000034bf R11: 00000000000034bf R12: ffffea4000000000
> R13: ffff981efefd9d80 R14: 0000000000000006 R15: 0000000000000006
> FS: 0000000000000000(0000) GS:ffffc90000000000(0000) knlGS:0000000000000000
> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
> CR2: ffffc7defefff000 CR3: 000000000194e000 CR4: 00000000000406b0
> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
> DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
> Process swapper (pid: 0, threadinfo ffffffff81942000, task ffffffff81955420)
> Stack:
> 00000000000000ff ffffc900000100a0 ffffc900000100d0 ffffffff00000040
> 0000000000000000 0000000081148809 0000000000000097 ffffea4000000000
> 0000000000000006 0000000000000002 0000000101e82bc0 ffffea4000001000
> Call Trace:
> [<ffffffff81149176>] __free_pages_ok+0x96/0xb0
> [<ffffffff8114c585>] __free_pages+0x25/0x50
> [<ffffffff8164c006>] __free_pages_bootmem+0x8a/0x8c
> [<ffffffff81a9684f>] __free_memory_core+0xea/0x131
> [<ffffffff81a968e0>] free_low_memory_core_early+0x4a/0x98
> [<ffffffff81a96973>] free_all_bootmem+0x45/0x47
> [<ffffffff81a87cff>] mem_init+0x7b/0x14c
> [<ffffffff81a70051>] start_kernel+0x216/0x433
> [<ffffffff81a6fc59>] ? repair_env_string+0x5b/0x5b
> [<ffffffff81a6f5f7>] x86_64_start_reservations+0x2a/0x2c
> [<ffffffff81a6f73d>] x86_64_start_kernel+0x144/0x153
> Code: 89 f1 ba 01 00 00 00 31 f6 d3 e2 4c 89 ef e8 66 a4 01 00 e9 2c fe ff ff 0f 0b eb fe 0f 0b 66 66 2e 0f 1f 84 00 00 00 00 00 eb f3 <0f> 0b eb fe 0f 0b 0f 1f 84 00 00 00 00 00 eb f6 0f 0b eb fe 49
> RIP [<ffffffff811477d2>] free_one_page+0x382/0x430
> RSP <ffffffff81943d98>
> ---[ end trace a7919e7f17c0a725 ]---
> Kernel panic - not syncing: Attempted to kill the idle task!
>
> Signed-off-by: Russ Anderson <rja@xxxxxxx>
> Reported-by: George Beshers <gbeshers@xxxxxxx>
> Acked-by: Hedi Berriche <hedi@xxxxxxx>
>
> ---
> include/linux/mmzone.h | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> Index: linux/include/linux/mmzone.h
> ===================================================================
> --- linux.orig/include/linux/mmzone.h 2013-03-18 10:06:59.744082190 -0500
> +++ linux/include/linux/mmzone.h 2013-03-18 10:23:27.374031648 -0500
> @@ -527,7 +527,7 @@ static inline int zone_is_oom_locked(con
> return test_bit(ZONE_OOM_LOCKED, &zone->flags);
> }
>
> -static inline unsigned zone_end_pfn(const struct zone *zone)
> +static inline unsigned long zone_end_pfn(const struct zone *zone)
> {
> return zone->zone_start_pfn + zone->spanned_pages;
> }
Ouch...
Any way to get the compiler to complain about the harmful integer
truncation here that happens on 64-bit platforms?
Thanks,
Ingo
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