Hello When loading kvm-amd.ko on an HP DL-145 G5 with one AMD Opteron 2216 HE (2 cores, 2.4 GHz), I get a kernel panic. I tried to find the exact cause but was unable to do so. It doesn't crash when I add a "return" before "wrmsrl(MSR_EFER, efer | MSR_EFER_SVME_MASK);" in svm_hardware_enable. The backtrace always originates from different functions, but ends up in interrupt handling every time. This isn't a regression because it has been happening since at least 2.6.20.something, but I never bothered to look into it. If you need any more info, please let me know.
I reproduced it with vanilla-2.6.21.5, vanilla-2.6.22-rc5 and current KVM git. Architecture is x86_64. GCC version is "gcc (GCC) 3.4.6 (Gentoo Hardened 3.4.6-r2, ssp-3.4.6-1.0, pie-8.7.10)". Panic with backtrace: # modprobe kvm-amd [ 142.341948] general protection fault: 0000 [1] SMP [ 142.400582] CPU 0 [ 142.424789] Modules linked in: kvm_amd kvm [ 142.474231] Pid: 542, comm: udevd Not tainted 2.6.22-rc4-g6685637b #1 [ 142.560608] RIP: 0010:[<ffffffff8801125e>] [<ffffffff8801125e>] :kvm_amd:svm_hardware_enable+0xa4/0xe1 [ 142.673099] RSP: 0018:ffffffff8063ff38 EFLAGS: 00010006 [ 142.736615] RAX: 0000000000001d01 RBX: 0000000000000040 RCX: 00000000c0000080 [ 142.821935] RDX: 0000000000000000 RSI: 000000008000000a RDI: ffffffff88012e9c [ 142.907256] RBP: ffffffff8063ff78 R08: 00000000ffffffff R09: 0000000000000000 [ 142.992577] R10: 0000000000000000 R11: 0000000000000000 R12: ffffffff880111ba [ 143.077898] R13: ffff81003b0d82c0 R14: 00000000ffffffff R15: 0000000000000000 [ 143.168925] FS: 00002b957acb06d0(0000) GS:ffffffff805cb000(0000) knlGS:0000000000000000 [ 143.265683] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b [ 143.334385] CR2: 00007fff30143fc8 CR3: 000000003c83c000 CR4: 00000000000006e0 [ 143.419705] Process udevd (pid: 542, threadinfo ffff81003cf52000, task ffff81003d245180) [ 143.516463] Stack: ffffffff8023361a ffff810001019300 ffff805e60000080 000000000000ffff [ 143.612944] ffff81003cf53c00 0000000000000000 ffffffff880111ba 0000000000000001 [ 143.702002] ffffffff8063ffa8 ffffffff80215308 0000000080526700 ffff81003cf53ce8 [ 143.788819] Call Trace: [ 143.820305] <IRQ> [<ffffffff8023361a>] _local_bh_enable+0xde/0xf5 [ 143.895402] [<ffffffff880111ba>] :kvm_amd:svm_hardware_enable+0x0/0xe1 [ 143.974492] [<ffffffff80215308>] smp_call_function_interrupt+0x45/0x65 [ 144.053582] [<ffffffff8020a22b>] call_function_interrupt+0x6b/0x70 [ 144.128517] <EOI> [<ffffffff803142c9>] vsnprintf+0x512/0x5ce [ 144.198421] [<ffffffff8031433c>] vsnprintf+0x585/0x5ce [ 144.260897] [<ffffffff80296b1e>] seq_printf+0xb8/0xe1 [ 144.322334] [<ffffffff80247aff>] lockdep_init_map+0x93/0x43c [ 144.391039] [<ffffffff80245ed7>] debug_mutex_init+0x2e/0x43 [ 144.458710] [<ffffffff80248628>] __lock_acquire+0x780/0xdc8 [ 144.526374] [<ffffffff802bc787>] show_stat+0x31b/0x370 [ 144.588848] [<ffffffff802965d1>] seq_read+0x10a/0x29f [ 144.650285] [<ffffffff8027d20a>] vfs_read+0xaf/0x132 [ 144.710682] [<ffffffff8027d52c>] sys_read+0x47/0x6e [ 144.770040] [<ffffffff8020965e>] system_call+0x7e/0x83 [ 144.832515] [ 144.850337] [ 144.850338] Code: 0f 30 49 8b 7d 20 41 bc 17 01 01 c0 e8 c9 94 24 f8 49 8b 7d [ 144.957752] RIP [<ffffffff8801125e>] :kvm_amd:svm_hardware_enable+0xa4/0xe1 [ 145.042187] RSP <ffffffff8063ff38> [ 145.083898] Kernel panic - not syncing: Aiee, killing interrupt handler! Greets, Michael ------------------------------------------------------------------------- This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
