intel_iommu=on iommu=pt カーネルパラメーターが hpwdt に設定されている場合は、予期しない NMI で HP システムがクラッシュします
Issue
- カーネルがパニックし、以下のトレースが出力されます。
An NMI occurred, but unable to determine source.
Kernel panic - not syncing:An NMI occurred, please see the Integrated Management Log for details.
Pid:0, comm: swapper Not tainted 2.6.32-358.14.1.el6.x86_64 #1
Call Trace:
<NMI> [<ffffffff8150d668>] ? panic+0xa7/0x16f
[<ffffffffa00404cd>] ? hpwdt_pretimeout+0x8d/0xbc [hpwdt]
[<ffffffff81513875>] ? notifier_call_chain+0x55/0x80
[<ffffffff815138da>] ? atomic_notifier_call_chain+0x1a/0x20
[<ffffffff8109cc3e>] ? notify_die+0x2e/0x30
[<ffffffff81511597>] ? do_nmi+0x217/0x340
[<ffffffff81510e00>] ? nmi+0x20/0x30
[<ffffffff81307665>] ? acpi_idle_do_entry+0x5d/0x67
<<EOE>> [<ffffffff81307ac6>] ? acpi_idle_enter_simple+0xc6/0x14b
[<ffffffff814153a7>] ? cpuidle_idle_call+0xa7/0x140
[<ffffffff81009fc6>] ? cpu_idle+0xb6/0x110
[<ffffffff815071bc>] ? start_secondary+0x2ac/0x2ef
- IML (Integrated Management Log) ログは以下の通りです。
An An Unrecoverable System Error (NMI) has occurred (System error code 0x00000000, 0x00000000)Unrecoverable System Error (NMI) has occurred (System error code 0x00000000, 0x00000000)
Environment
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 5
- HP ProLiant Generation 7
- HP ProLiant Generation 8
- HP Watchdog Timer Driver (hpwdt)
- Kernel のコマンドラインに "intel_iommu=on iommu=pt" が含まれている
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