linux-kernel - [LKP] [iommu] fe4b991dcd8: WARNING: CPU: 0 PID: 1 at drivers/iommu/io-pgtable-arm.c:413 __arm_lpae

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Date:	Mon, 16 Feb 2015 13:57:32 +0800
From:	Huang Ying <ying.huang@...el.com>
To:	Will Deacon <will.deacon@....com>
Cc:	LKML <linux-kernel@...r.kernel.org>, LKP ML <lkp@...org>
Subject: [LKP] [iommu] fe4b991dcd8: WARNING: CPU: 0 PID: 1 at
 drivers/iommu/io-pgtable-arm.c:413 __arm_lpae_unmap+0xa8/0x321()

FYI, we noticed the below changes on

git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
commit fe4b991dcd84e0104cf2e29223a819335ed048a7 ("iommu: add self-consistency tests to ARM LPAE IO page table allocator")


+--------------------------------------------------------------------+------------+------------+
|                                                                    | e1d3c0fd70 | fe4b991dcd |
+--------------------------------------------------------------------+------------+------------+
| boot_successes                                                     | 0          | 0          |
| boot_failures                                                      | 80         | 20         |
| Kernel_panic-not_syncing:Out_of_memory_and_no_killable_processes   | 31         | 1          |
| backtrace:async_run_entry_fn                                       | 7          |            |
| backtrace:serio_handle_event                                       | 23         | 1          |
| backtrace:do_fork                                                  | 1          |            |
| backtrace:kthreadd                                                 | 1          |            |
| WARNING:at_net/netlink/genetlink.c:#genl_unbind()                  | 49         | 19         |
| backtrace:do_group_exit                                            | 49         | 19         |
| backtrace:SyS_exit_group                                           | 49         | 19         |
| backtrace:SYSC_socketcall                                          | 19         | 9          |
| backtrace:SyS_socketcall                                           | 19         | 9          |
| WARNING:at_drivers/iommu/io-pgtable-arm.c:#__arm_lpae_unmap()      | 0          | 20         |
| WARNING:at_drivers/iommu/io-pgtable-arm.c:#arm_lpae_do_selftests() | 0          | 20         |
| backtrace:arm_lpae_do_selftests                                    | 0          | 20         |
| backtrace:kernel_init_freeable                                     | 0          | 20         |
+--------------------------------------------------------------------+------------+------------+


[    0.670018] arm-lpae io-pgtable: selftest: pgsize_bitmap 0x40201000, IAS 36
[    0.671681] arm-lpae io-pgtable: selftest: pgsize_bitmap 0x40201000, IAS 40
[    0.673002] ------------[ cut here ]------------
[    0.673352] WARNING: CPU: 0 PID: 1 at drivers/iommu/io-pgtable-arm.c:413 __arm_lpae_unmap+0xa8/0x321()
[    0.675487] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.19.0-05185-g8bd9653 #524
[    0.676672] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[    0.677979]  00000000 00000000 d4485e08 c153abb9 00000000 d4485e24 c103a2e1 0000019d
[    0.680005]  c12e41c0 d454aab0 00000000 00000000 d4485e34 c103a37e 00000009 00000000
[    0.682517]  d4485e90 c12e41c0 00000080 80000000 d4485ed0 0000000c d462b000 00600000
[    0.685218] Call Trace:
[    0.686123]  [<c153abb9>] dump_stack+0x48/0x60
[    0.686685]  [<c103a2e1>] warn_slowpath_common+0x7a/0x91
[    0.687886]  [<c12e41c0>] ? __arm_lpae_unmap+0xa8/0x321
[    0.688868]  [<c103a37e>] warn_slowpath_null+0xf/0x13
[    0.690007]  [<c12e41c0>] __arm_lpae_unmap+0xa8/0x321
[    0.691101]  [<c12e3f84>] ? arm_lpae_map+0xa4/0xaf
[    0.692091]  [<c12e4454>] arm_lpae_unmap+0x1b/0x35
[    0.693122]  [<c18c2226>] arm_lpae_do_selftests+0x1e0/0x394
[    0.693340]  [<c18c2046>] ? arm_lpae_dump_ops+0x37/0x37
[    0.694608]  [<c189cc4f>] do_one_initcall+0x177/0x18a
[    0.695832]  [<c189c505>] ? repair_env_string+0x12/0x54
[    0.696676]  [<c189c400>] ? do_early_param+0x1e/0x73
[    0.697754]  [<c104bb95>] ? parse_args+0x28b/0x38c
[    0.699048]  [<c189c4f3>] ? initcall_blacklist+0x9e/0x9e
[    0.700012]  [<c105e2b8>] ? __wake_up+0x32/0x3b
[    0.701157]  [<c189cdc6>] kernel_init_freeable+0x164/0x1e1
[    0.702379]  [<c189cdc6>] ? kernel_init_freeable+0x164/0x1e1
[    0.703343]  [<c1537939>] kernel_init+0x8/0xb8
[    0.704443]  [<c1540241>] ret_from_kernel_thread+0x21/0x30
[    0.705695]  [<c1537931>] ? rest_init+0x6d/0x6d
[    0.706684] ---[ end trace 256446aaff3c6bbd ]---
[    0.707933] ------------[ cut here ]------------



Thanks,
Ying Huang


View attachment "config-3.19.0-rc4-00003-gfe4b991" of type "text/plain" (75537 bytes)

View attachment ".dmesg" of type "text/plain" (96473 bytes)

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