* mm: kernel BUG at mm/huge_memory.c:1371!
@ 2014-02-21 22:46 Sasha Levin
2014-02-21 23:51 ` Kirill A. Shutemov
0 siblings, 1 reply; 6+ messages in thread
From: Sasha Levin @ 2014-02-21 22:46 UTC (permalink / raw)
To: linux-mm@kvack.org; +Cc: Andrew Morton, LKML
Hi all,
While fuzzing with trinity inside a KVM tools guest running latest -next kernel I've stumbled on the
following (now with pretty line numbers!) spew:
[ 746.125099] kernel BUG at mm/huge_memory.c:1371!
[ 746.125775] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
[ 746.126774] Dumping ftrace buffer:
[ 746.127484] (ftrace buffer empty)
[ 746.127781] Modules linked in:
[ 746.128358] CPU: 2 PID: 19816 Comm: trinity-c127 Tainted: G W
3.14.0-rc3-next-20140221-sasha-00008-g0e660cf-dirty #114
[ 746.130196] task: ffff8803a7cc3000 ti: ffff8803a7f1c000 task.ti: ffff8803a7f1c000
[ 746.130317] RIP: 0010:[<mm/huge_memory.c:1371>] [<mm/huge_memory.c:1371>] zap_huge_pmd+0x17a/0x200
[ 746.130317] RSP: 0018:ffff8803a7f1dca8 EFLAGS: 00010246
[ 746.130317] RAX: ffff8801ab4ac000 RBX: ffff8803a7f1ddd8 RCX: 000000000000002e
[ 746.130317] RDX: 0000000000000000 RSI: ffff8803a7cc3d00 RDI: 000000000172c000
[ 746.130317] RBP: ffff8803a7f1dce8 R08: 0000000000000000 R09: 0000000000000000
[ 746.130317] R10: 0000000000000001 R11: 0000000000000001 R12: ffffea0006a8fa00
[ 746.130317] R13: ffffea0005cb0000 R14: 00007f784f800000 R15: 00007f785750bfff
[ 746.130317] FS: 00007f785afbc700(0000) GS:ffff8801abc00000(0000) knlGS:0000000000000000
[ 746.130317] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 746.130317] CR2: 0000000000000010 CR3: 00000003a9739000 CR4: 00000000000006e0
[ 746.130317] DR0: 0000000000693000 DR1: 0000000000000000 DR2: 0000000000000000
[ 746.130317] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[ 746.130317] Stack:
[ 746.130317] 00000000000004de ffff8803a9777390 ffff8803a7f1dce8 ffff8803a2afd3e0
[ 746.130317] 00007f784f800000 00007f785750c000 ffff8803a7f1ddd8 00007f785750bfff
[ 746.130317] ffff8803a7f1dd78 ffffffff81285536 00000000001d8500 00007f784fa00000
[ 746.130317] Call Trace:
[ 746.130317] [<mm/memory.c:1231 mm/memory.c:1265 mm/memory.c:1290>] unmap_page_range+0x2c6/0x410
[ 746.130317] [<mm/memory.c:1338>] unmap_single_vma+0xf1/0x110
[ 746.130317] [<mm/memory.c:1390>] zap_page_range+0x121/0x170
[ 746.130317] [<mm/madvise.c:271 mm/madvise.c:371>] madvise_vma+0x180/0x1c0
[ 746.130317] [<mm/madvise.c:518 mm/madvise.c:448>] SyS_madvise+0x17e/0x250
[ 746.130317] [<arch/x86/kernel/entry_64.S:749>] tracesys+0xdd/0xe2
[ 746.152464] Code: 00 eb fe 66 0f 1f 44 00 00 48 8b 03 f0 48 81 80 60 03 00 00 00 fe ff ff 49 8b
45 00 f6 c4 40 75 18 31 f6 4c 89 ef e8 26 29 f9 ff <0f> 0b 0f 1f 40 00 eb fe 66 0f 1f 44 00 00 48 8b
03 f0 48 ff 48
[ 746.152464] RIP [<mm/huge_memory.c:1371>] zap_huge_pmd+0x17a/0x200
[ 746.152464] RSP <ffff8803a7f1dca8>
Thanks,
Sasha
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: mm: kernel BUG at mm/huge_memory.c:1371!
2014-02-21 22:46 mm: kernel BUG at mm/huge_memory.c:1371! Sasha Levin
@ 2014-02-21 23:51 ` Kirill A. Shutemov
2014-02-22 1:10 ` Sasha Levin
0 siblings, 1 reply; 6+ messages in thread
From: Kirill A. Shutemov @ 2014-02-21 23:51 UTC (permalink / raw)
To: Sasha Levin; +Cc: linux-mm@kvack.org, Andrew Morton, LKML
On Fri, Feb 21, 2014 at 05:46:36PM -0500, Sasha Levin wrote:
> Hi all,
>
> While fuzzing with trinity inside a KVM tools guest running latest -next
> kernel I've stumbled on the following (now with pretty line numbers!) spew:
>
> [ 746.125099] kernel BUG at mm/huge_memory.c:1371!
It "VM_BUG_ON_PAGE(!PageHead(page), page);", correct?
I don't see dump_page() output.
> [ 746.125775] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
> [ 746.126774] Dumping ftrace buffer:
> [ 746.127484] (ftrace buffer empty)
> [ 746.127781] Modules linked in:
> [ 746.128358] CPU: 2 PID: 19816 Comm: trinity-c127 Tainted: G W
> 3.14.0-rc3-next-20140221-sasha-00008-g0e660cf-dirty #114
> [ 746.130196] task: ffff8803a7cc3000 ti: ffff8803a7f1c000 task.ti: ffff8803a7f1c000
> [ 746.130317] RIP: 0010:[<mm/huge_memory.c:1371>] [<mm/huge_memory.c:1371>] zap_huge_pmd+0x17a/0x200
> [ 746.130317] RSP: 0018:ffff8803a7f1dca8 EFLAGS: 00010246
> [ 746.130317] RAX: ffff8801ab4ac000 RBX: ffff8803a7f1ddd8 RCX: 000000000000002e
> [ 746.130317] RDX: 0000000000000000 RSI: ffff8803a7cc3d00 RDI: 000000000172c000
> [ 746.130317] RBP: ffff8803a7f1dce8 R08: 0000000000000000 R09: 0000000000000000
> [ 746.130317] R10: 0000000000000001 R11: 0000000000000001 R12: ffffea0006a8fa00
> [ 746.130317] R13: ffffea0005cb0000 R14: 00007f784f800000 R15: 00007f785750bfff
> [ 746.130317] FS: 00007f785afbc700(0000) GS:ffff8801abc00000(0000) knlGS:0000000000000000
> [ 746.130317] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> [ 746.130317] CR2: 0000000000000010 CR3: 00000003a9739000 CR4: 00000000000006e0
> [ 746.130317] DR0: 0000000000693000 DR1: 0000000000000000 DR2: 0000000000000000
> [ 746.130317] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
> [ 746.130317] Stack:
> [ 746.130317] 00000000000004de ffff8803a9777390 ffff8803a7f1dce8 ffff8803a2afd3e0
> [ 746.130317] 00007f784f800000 00007f785750c000 ffff8803a7f1ddd8 00007f785750bfff
> [ 746.130317] ffff8803a7f1dd78 ffffffff81285536 00000000001d8500 00007f784fa00000
> [ 746.130317] Call Trace:
> [ 746.130317] [<mm/memory.c:1231 mm/memory.c:1265 mm/memory.c:1290>] unmap_page_range+0x2c6/0x410
> [ 746.130317] [<mm/memory.c:1338>] unmap_single_vma+0xf1/0x110
> [ 746.130317] [<mm/memory.c:1390>] zap_page_range+0x121/0x170
> [ 746.130317] [<mm/madvise.c:271 mm/madvise.c:371>] madvise_vma+0x180/0x1c0
> [ 746.130317] [<mm/madvise.c:518 mm/madvise.c:448>] SyS_madvise+0x17e/0x250
> [ 746.130317] [<arch/x86/kernel/entry_64.S:749>] tracesys+0xdd/0xe2
> [ 746.152464] Code: 00 eb fe 66 0f 1f 44 00 00 48 8b 03 f0 48 81 80 60 03
> 00 00 00 fe ff ff 49 8b 45 00 f6 c4 40 75 18 31 f6 4c 89 ef e8 26 29 f9 ff
> <0f> 0b 0f 1f 40 00 eb fe 66 0f 1f 44 00 00 48 8b 03 f0 48 ff 48
> [ 746.152464] RIP [<mm/huge_memory.c:1371>] zap_huge_pmd+0x17a/0x200
> [ 746.152464] RSP <ffff8803a7f1dca8>
>
>
> Thanks,
> Sasha
> --
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> the body of a message to majordomo@vger.kernel.org
> More majordomo info at http://vger.kernel.org/majordomo-info.html
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--
Kirill A. Shutemov
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: mm: kernel BUG at mm/huge_memory.c:1371!
2014-02-21 23:51 ` Kirill A. Shutemov
@ 2014-02-22 1:10 ` Sasha Levin
2014-02-28 17:20 ` Sasha Levin
0 siblings, 1 reply; 6+ messages in thread
From: Sasha Levin @ 2014-02-22 1:10 UTC (permalink / raw)
To: Kirill A. Shutemov; +Cc: linux-mm@kvack.org, Andrew Morton, LKML
On 02/21/2014 06:51 PM, Kirill A. Shutemov wrote:
> On Fri, Feb 21, 2014 at 05:46:36PM -0500, Sasha Levin wrote:
>> >Hi all,
>> >
>> >While fuzzing with trinity inside a KVM tools guest running latest -next
>> >kernel I've stumbled on the following (now with pretty line numbers!) spew:
>> >
>> >[ 746.125099] kernel BUG at mm/huge_memory.c:1371!
> It "VM_BUG_ON_PAGE(!PageHead(page), page);", correct?
> I don't see dump_page() output.
Right. However, I'm not seeing the dump_page() output in the log.
I see that dump_page() has been modified not long ago, I'm looking into it.
Thanks,
Sasha
--
To unsubscribe, send a message with 'unsubscribe linux-mm' in
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: mm: kernel BUG at mm/huge_memory.c:1371!
2014-02-22 1:10 ` Sasha Levin
@ 2014-02-28 17:20 ` Sasha Levin
2014-04-08 20:56 ` Sasha Levin
0 siblings, 1 reply; 6+ messages in thread
From: Sasha Levin @ 2014-02-28 17:20 UTC (permalink / raw)
To: Sasha Levin, Kirill A. Shutemov; +Cc: linux-mm@kvack.org, Andrew Morton, LKML
On 02/21/2014 08:10 PM, Sasha Levin wrote:
> On 02/21/2014 06:51 PM, Kirill A. Shutemov wrote:
>> On Fri, Feb 21, 2014 at 05:46:36PM -0500, Sasha Levin wrote:
>>> >Hi all,
>>> >
>>> >While fuzzing with trinity inside a KVM tools guest running latest -next
>>> >kernel I've stumbled on the following (now with pretty line numbers!) spew:
>>> >
>>> >[ 746.125099] kernel BUG at mm/huge_memory.c:1371!
>> It "VM_BUG_ON_PAGE(!PageHead(page), page);", correct?
>> I don't see dump_page() output.
>
> Right. However, I'm not seeing the dump_page() output in the log.
>
> I see that dump_page() has been modified not long ago, I'm looking into it.
Alright, here we go:
[ 3323.062742] page:ffffea00080f0000 count:3 mapcount:0 mapping:ffff8802292ee0e1 index:0x7fa2e6800
[ 3323.065978] page flags: 0x16fffff80090018(uptodate|dirty|swapcache|swapbacked)
[ 3323.068535] ------------[ cut here ]------------
[ 3323.069669] kernel BUG at mm/huge_memory.c:1371!
[ 3323.070961] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
[ 3323.071028] Dumping ftrace buffer:
[ 3323.071028] (ftrace buffer empty)
[ 3323.071028] Modules linked in:
[ 3323.071028] CPU: 101 PID: 48284 Comm: trinity-c101 Tainted: G W
3.14.0-rc4-next-20140228-sasha-00011-g4077c67 #25
[ 3323.071028] task: ffff8800c2718000 ti: ffff8800c26ec000 task.ti: ffff8800c26ec000
[ 3323.071028] RIP: 0010:[<ffffffff812c083a>] [<ffffffff812c083a>] zap_huge_pmd+0x17a/0x200
[ 3323.071028] RSP: 0018:ffff8800c26edc78 EFLAGS: 00010246
[ 3323.071028] RAX: ffff88022febc000 RBX: ffff8800c26edde8 RCX: 0000000000000040
[ 3323.071028] RDX: 0000000000000000 RSI: ffff8800c2718cc0 RDI: 000000000203c000
[ 3323.071028] RBP: ffff8800c26edcb8 R08: 0000000000000000 R09: 0000000000000000
[ 3323.071028] R10: 0000000000000001 R11: 0000000000000001 R12: ffffea0008b9e240
[ 3323.071028] R13: ffffea00080f0000 R14: 00007fa2e6800000 R15: 00007fa2ffffffff
[ 3323.071028] FS: 00007fa31e1b8700(0000) GS:ffff880230600000(0000) knlGS:0000000000000000
[ 3323.071028] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 3323.071028] CR2: 00007fa31e1e8990 CR3: 0000000005c25000 CR4: 00000000000006e0
[ 3323.071028] DR0: 0000000000698000 DR1: 0000000000698000 DR2: 0000000000698000
[ 3323.071028] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
[ 3323.071028] Stack:
[ 3323.071028] 00000000000004de ffff88022e2139d0 ffff8800c26edcb8 ffff88021b7ef9a0
[ 3323.071028] 00007fa2e6800000 00007fa300000000 ffff8800c26edde8 00007fa2ffffffff
[ 3323.071028] ffff8800c26edd48 ffffffff812800c6 ffffea0008454540 00007fa2e6a00000
[ 3323.071028] Call Trace:
[ 3323.071028] [<ffffffff812800c6>] unmap_page_range+0x2c6/0x410
[ 3323.071028] [<ffffffff81280301>] unmap_single_vma+0xf1/0x110
[ 3323.071028] [<ffffffff81280381>] unmap_vmas+0x61/0xa0
[ 3323.071028] [<ffffffff812875e0>] exit_mmap+0xd0/0x170
[ 3323.071028] [<ffffffff811387a7>] mmput+0x77/0xe0
[ 3323.071028] [<ffffffff8113c80d>] exit_mm+0x18d/0x1a0
[ 3323.071028] [<ffffffff811ecea5>] ? acct_collect+0x175/0x1b0
[ 3323.071028] [<ffffffff8113ec1a>] do_exit+0x26a/0x510
[ 3323.071028] [<ffffffff8113ef61>] do_group_exit+0xa1/0xe0
[ 3323.071028] [<ffffffff8113efb2>] SyS_exit_group+0x12/0x20
[ 3323.071028] [<ffffffff8439f720>] tracesys+0xdd/0xe2
[ 3323.071028] Code: 00 eb fe 66 0f 1f 44 00 00 48 8b 03 f0 48 81 80 60 03 00 00 00 fe ff ff 49 8b
45 00 f6 c4 40 75 18 31 f6 4c 89 ef e8 f6 1f f9 ff <0f> 0b 0f 1f 40 00 eb fe 66 0f 1f 44 00 00 48 8b
03 f0 48 ff 48
[ 3323.071028] RIP [<ffffffff812c083a>] zap_huge_pmd+0x17a/0x200
[ 3323.071028] RSP <ffff8800c26edc78>
Thanks,
Sasha
--
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: mm: kernel BUG at mm/huge_memory.c:1371!
2014-02-28 17:20 ` Sasha Levin
@ 2014-04-08 20:56 ` Sasha Levin
2014-04-10 10:37 ` Kirill A. Shutemov
0 siblings, 1 reply; 6+ messages in thread
From: Sasha Levin @ 2014-04-08 20:56 UTC (permalink / raw)
To: Kirill A. Shutemov; +Cc: linux-mm@kvack.org, Andrew Morton, LKML
On 02/28/2014 12:20 PM, Sasha Levin wrote:
> On 02/21/2014 08:10 PM, Sasha Levin wrote:
>> On 02/21/2014 06:51 PM, Kirill A. Shutemov wrote:
>>> On Fri, Feb 21, 2014 at 05:46:36PM -0500, Sasha Levin wrote:
>>>> >Hi all,
>>>> >
>>>> >While fuzzing with trinity inside a KVM tools guest running latest -next
>>>> >kernel I've stumbled on the following (now with pretty line numbers!) spew:
>>>> >
>>>> >[ 746.125099] kernel BUG at mm/huge_memory.c:1371!
>>> It "VM_BUG_ON_PAGE(!PageHead(page), page);", correct?
>>> I don't see dump_page() output.
>>
>> Right. However, I'm not seeing the dump_page() output in the log.
>>
>> I see that dump_page() has been modified not long ago, I'm looking into it.
>
> Alright, here we go:
>
> [ 3323.062742] page:ffffea00080f0000 count:3 mapcount:0 mapping:ffff8802292ee0e1 index:0x7fa2e6800
> [ 3323.065978] page flags: 0x16fffff80090018(uptodate|dirty|swapcache|swapbacked)
> [ 3323.068535] ------------[ cut here ]------------
> [ 3323.069669] kernel BUG at mm/huge_memory.c:1371!
> [ 3323.070961] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
> [ 3323.071028] Dumping ftrace buffer:
> [ 3323.071028] (ftrace buffer empty)
> [ 3323.071028] Modules linked in:
> [ 3323.071028] CPU: 101 PID: 48284 Comm: trinity-c101 Tainted: G W 3.14.0-rc4-next-20140228-sasha-00011-g4077c67 #25
> [ 3323.071028] task: ffff8800c2718000 ti: ffff8800c26ec000 task.ti: ffff8800c26ec000
> [ 3323.071028] RIP: 0010:[<ffffffff812c083a>] [<ffffffff812c083a>] zap_huge_pmd+0x17a/0x200
> [ 3323.071028] RSP: 0018:ffff8800c26edc78 EFLAGS: 00010246
> [ 3323.071028] RAX: ffff88022febc000 RBX: ffff8800c26edde8 RCX: 0000000000000040
> [ 3323.071028] RDX: 0000000000000000 RSI: ffff8800c2718cc0 RDI: 000000000203c000
> [ 3323.071028] RBP: ffff8800c26edcb8 R08: 0000000000000000 R09: 0000000000000000
> [ 3323.071028] R10: 0000000000000001 R11: 0000000000000001 R12: ffffea0008b9e240
> [ 3323.071028] R13: ffffea00080f0000 R14: 00007fa2e6800000 R15: 00007fa2ffffffff
> [ 3323.071028] FS: 00007fa31e1b8700(0000) GS:ffff880230600000(0000) knlGS:0000000000000000
> [ 3323.071028] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> [ 3323.071028] CR2: 00007fa31e1e8990 CR3: 0000000005c25000 CR4: 00000000000006e0
> [ 3323.071028] DR0: 0000000000698000 DR1: 0000000000698000 DR2: 0000000000698000
> [ 3323.071028] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
> [ 3323.071028] Stack:
> [ 3323.071028] 00000000000004de ffff88022e2139d0 ffff8800c26edcb8 ffff88021b7ef9a0
> [ 3323.071028] 00007fa2e6800000 00007fa300000000 ffff8800c26edde8 00007fa2ffffffff
> [ 3323.071028] ffff8800c26edd48 ffffffff812800c6 ffffea0008454540 00007fa2e6a00000
> [ 3323.071028] Call Trace:
> [ 3323.071028] [<ffffffff812800c6>] unmap_page_range+0x2c6/0x410
> [ 3323.071028] [<ffffffff81280301>] unmap_single_vma+0xf1/0x110
> [ 3323.071028] [<ffffffff81280381>] unmap_vmas+0x61/0xa0
> [ 3323.071028] [<ffffffff812875e0>] exit_mmap+0xd0/0x170
> [ 3323.071028] [<ffffffff811387a7>] mmput+0x77/0xe0
> [ 3323.071028] [<ffffffff8113c80d>] exit_mm+0x18d/0x1a0
> [ 3323.071028] [<ffffffff811ecea5>] ? acct_collect+0x175/0x1b0
> [ 3323.071028] [<ffffffff8113ec1a>] do_exit+0x26a/0x510
> [ 3323.071028] [<ffffffff8113ef61>] do_group_exit+0xa1/0xe0
> [ 3323.071028] [<ffffffff8113efb2>] SyS_exit_group+0x12/0x20
> [ 3323.071028] [<ffffffff8439f720>] tracesys+0xdd/0xe2
> [ 3323.071028] Code: 00 eb fe 66 0f 1f 44 00 00 48 8b 03 f0 48 81 80 60 03 00 00 00 fe ff ff 49 8b 45 00 f6 c4 40 75 18 31 f6 4c 89 ef e8 f6 1f f9 ff <0f> 0b 0f 1f 40 00 eb fe 66 0f 1f 44 00 00 48 8b 03 f0 48 ff 48
> [ 3323.071028] RIP [<ffffffff812c083a>] zap_huge_pmd+0x17a/0x200
> [ 3323.071028] RSP <ffff8800c26edc78>
This is still happening in -next. Anything else I can provide that'll be useful?
Thanks,
Sasha
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To unsubscribe, send a message with 'unsubscribe linux-mm' in
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^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: mm: kernel BUG at mm/huge_memory.c:1371!
2014-04-08 20:56 ` Sasha Levin
@ 2014-04-10 10:37 ` Kirill A. Shutemov
0 siblings, 0 replies; 6+ messages in thread
From: Kirill A. Shutemov @ 2014-04-10 10:37 UTC (permalink / raw)
To: Sasha Levin; +Cc: linux-mm@kvack.org, Andrew Morton, LKML
On Tue, Apr 08, 2014 at 04:56:01PM -0400, Sasha Levin wrote:
> On 02/28/2014 12:20 PM, Sasha Levin wrote:
> > On 02/21/2014 08:10 PM, Sasha Levin wrote:
> >> On 02/21/2014 06:51 PM, Kirill A. Shutemov wrote:
> >>> On Fri, Feb 21, 2014 at 05:46:36PM -0500, Sasha Levin wrote:
> >>>> >Hi all,
> >>>> >
> >>>> >While fuzzing with trinity inside a KVM tools guest running latest -next
> >>>> >kernel I've stumbled on the following (now with pretty line numbers!) spew:
> >>>> >
> >>>> >[ 746.125099] kernel BUG at mm/huge_memory.c:1371!
> >>> It "VM_BUG_ON_PAGE(!PageHead(page), page);", correct?
> >>> I don't see dump_page() output.
> >>
> >> Right. However, I'm not seeing the dump_page() output in the log.
> >>
> >> I see that dump_page() has been modified not long ago, I'm looking into it.
> >
> > Alright, here we go:
> >
> > [ 3323.062742] page:ffffea00080f0000 count:3 mapcount:0 mapping:ffff8802292ee0e1 index:0x7fa2e6800
> > [ 3323.065978] page flags: 0x16fffff80090018(uptodate|dirty|swapcache|swapbacked)
> > [ 3323.068535] ------------[ cut here ]------------
> > [ 3323.069669] kernel BUG at mm/huge_memory.c:1371!
> > [ 3323.070961] invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
> > [ 3323.071028] Dumping ftrace buffer:
> > [ 3323.071028] (ftrace buffer empty)
> > [ 3323.071028] Modules linked in:
> > [ 3323.071028] CPU: 101 PID: 48284 Comm: trinity-c101 Tainted: G W 3.14.0-rc4-next-20140228-sasha-00011-g4077c67 #25
> > [ 3323.071028] task: ffff8800c2718000 ti: ffff8800c26ec000 task.ti: ffff8800c26ec000
> > [ 3323.071028] RIP: 0010:[<ffffffff812c083a>] [<ffffffff812c083a>] zap_huge_pmd+0x17a/0x200
> > [ 3323.071028] RSP: 0018:ffff8800c26edc78 EFLAGS: 00010246
> > [ 3323.071028] RAX: ffff88022febc000 RBX: ffff8800c26edde8 RCX: 0000000000000040
> > [ 3323.071028] RDX: 0000000000000000 RSI: ffff8800c2718cc0 RDI: 000000000203c000
> > [ 3323.071028] RBP: ffff8800c26edcb8 R08: 0000000000000000 R09: 0000000000000000
> > [ 3323.071028] R10: 0000000000000001 R11: 0000000000000001 R12: ffffea0008b9e240
> > [ 3323.071028] R13: ffffea00080f0000 R14: 00007fa2e6800000 R15: 00007fa2ffffffff
> > [ 3323.071028] FS: 00007fa31e1b8700(0000) GS:ffff880230600000(0000) knlGS:0000000000000000
> > [ 3323.071028] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
> > [ 3323.071028] CR2: 00007fa31e1e8990 CR3: 0000000005c25000 CR4: 00000000000006e0
> > [ 3323.071028] DR0: 0000000000698000 DR1: 0000000000698000 DR2: 0000000000698000
> > [ 3323.071028] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
> > [ 3323.071028] Stack:
> > [ 3323.071028] 00000000000004de ffff88022e2139d0 ffff8800c26edcb8 ffff88021b7ef9a0
> > [ 3323.071028] 00007fa2e6800000 00007fa300000000 ffff8800c26edde8 00007fa2ffffffff
> > [ 3323.071028] ffff8800c26edd48 ffffffff812800c6 ffffea0008454540 00007fa2e6a00000
> > [ 3323.071028] Call Trace:
> > [ 3323.071028] [<ffffffff812800c6>] unmap_page_range+0x2c6/0x410
> > [ 3323.071028] [<ffffffff81280301>] unmap_single_vma+0xf1/0x110
> > [ 3323.071028] [<ffffffff81280381>] unmap_vmas+0x61/0xa0
> > [ 3323.071028] [<ffffffff812875e0>] exit_mmap+0xd0/0x170
> > [ 3323.071028] [<ffffffff811387a7>] mmput+0x77/0xe0
> > [ 3323.071028] [<ffffffff8113c80d>] exit_mm+0x18d/0x1a0
> > [ 3323.071028] [<ffffffff811ecea5>] ? acct_collect+0x175/0x1b0
> > [ 3323.071028] [<ffffffff8113ec1a>] do_exit+0x26a/0x510
> > [ 3323.071028] [<ffffffff8113ef61>] do_group_exit+0xa1/0xe0
> > [ 3323.071028] [<ffffffff8113efb2>] SyS_exit_group+0x12/0x20
> > [ 3323.071028] [<ffffffff8439f720>] tracesys+0xdd/0xe2
> > [ 3323.071028] Code: 00 eb fe 66 0f 1f 44 00 00 48 8b 03 f0 48 81 80 60 03 00 00 00 fe ff ff 49 8b 45 00 f6 c4 40 75 18 31 f6 4c 89 ef e8 f6 1f f9 ff <0f> 0b 0f 1f 40 00 eb fe 66 0f 1f 44 00 00 48 8b 03 f0 48 ff 48
> > [ 3323.071028] RIP [<ffffffff812c083a>] zap_huge_pmd+0x17a/0x200
> > [ 3323.071028] RSP <ffff8800c26edc78>
>
> This is still happening in -next. Anything else I can provide that'll be useful?
I don't know... :(
One theory I have is that the root cause of the bug is the same as with
mm/huge_memory.c:1829 bug. If the compound page has been split but we miss
the vma where PMD should be split, then we could see the effect. It could
happend due anon_vma_interval_tree_foreach() vs.
anon_vma_interval_tree_insert() race or something else.
--
Kirill A. Shutemov
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2014-04-10 10:37 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2014-02-21 22:46 mm: kernel BUG at mm/huge_memory.c:1371! Sasha Levin
2014-02-21 23:51 ` Kirill A. Shutemov
2014-02-22 1:10 ` Sasha Levin
2014-02-28 17:20 ` Sasha Levin
2014-04-08 20:56 ` Sasha Levin
2014-04-10 10:37 ` Kirill A. Shutemov
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