Hi, We've had a report[1] that the intel_pstate driver will panic on boot under certain virtual machine environments. Thus far it seems VMWare and Hyper-V both see this. While this may be because of something those VMs are doing, the driver probably shouldn't cause a panic if it's getting some iffy data. Oops below. This was with Linus' tree as of Linux v3.8-9456-g309667e. josh [1] https://bugzilla.redhat.com/show_bug.cgi?id=916833 [ 5.740065] Intel P-state driver initializing. [ 5.741503] Intel pstate controlling: cpu 0 [ 5.742983] divide error: 0000 [#1] SMP [ 5.744284] Modules linked in: [ 5.745225] CPU 0 [ 5.745612] Pid: 1, comm: swapper/0 Not tainted 3.9.0-0.rc0.git11.1.fc19.x86_64 #1 VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform [ 5.750186] RIP: 0010:[<ffffffff8158562d>] [<ffffffff8158562d>] intel_pstate_set_policy+0x6d/0x130 [ 5.752686] RSP: 0018:ffff880033535bb0 EFLAGS: 00010246 [ 5.754478] RAX: 0000000000000000 RBX: ffff880033535c10 RCX: 0000000000000000 [ 5.757091] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 [ 5.759356] RBP: ffff880033535bc0 R08: a3d70a3d70a3d70b R09: 0000000000000064 [ 5.761265] R10: 0000000000000000 R11: 0000000000000064 R12: ffff88002ace2760 [ 5.763102] R13: 0000000000000000 R14: 0000000000000040 R15: 0000000000000040 [ 5.765004] FS: 0000000000000000(0000) GS:ffff880036600000(0000) knlGS:0000000000000000 [ 5.767496] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 5.769486] CR2: 0000000000000000 CR3: 0000000001c0c000 CR4: 00000000000407f0 [ 5.771679] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 5.773942] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 [ 5.775722] Process swapper/0 (pid: 1, threadinfo ffff880033534000, task ffff880033538000) [ 5.778419] Stack: [ 5.779495] 0000000000000000 ffff880033535c10 ffff880033535bf0 ffffffff8157d773 [ 5.781799] ffff88002ace2808 ffff88002ace2760 0000000000000000 0000000000000040 [ 5.784320] ffff880033535d88 ffffffff8157dd74 ffff880000000000 0000000000000282 [ 5.786624] Call Trace: [ 5.787644] [<ffffffff8157d773>] __cpufreq_set_policy+0x103/0x280 [ 5.789789] [<ffffffff8157dd74>] cpufreq_add_dev_interface+0x294/0x350 [ 5.791991] [<ffffffff8157daa0>] ? cpufreq_update_policy+0x1b0/0x1b0 [ 5.793740] [<ffffffff8157ec4f>] cpufreq_add_dev+0x4af/0x5e0 [ 5.795496] [<ffffffff8146ed49>] subsys_interface_register+0xa9/0xf0 [ 5.797269] [<ffffffff8157c63f>] cpufreq_register_driver+0x9f/0x200 [ 5.799054] [<ffffffff81f5ea0c>] ? intel_pstate_setup+0x2f/0x2f [ 5.800932] [<ffffffff81f5ea9c>] intel_pstate_init+0x90/0x143 [ 5.802796] [<ffffffff8100210a>] do_one_initcall+0x10a/0x160 [ 5.804657] [<ffffffff81f1f09c>] kernel_init_freeable+0x17c/0x202 [ 5.806830] [<ffffffff81f1e88b>] ? do_early_param+0x88/0x88 [ 5.808404] [<ffffffff816fb6f0>] ? rest_init+0x150/0x150 [ 5.809862] [<ffffffff816fb6fe>] kernel_init+0xe/0x190 [ 5.811507] [<ffffffff8172502c>] ret_from_fork+0x7c/0xb0 [ 5.813352] [<ffffffff816fb6f0>] ? rest_init+0x150/0x150 [ 5.814812] Code: 41 ba 64 00 00 00 8b 7b 1c 31 d2 41 b9 64 00 00 00 49 b8 0b d7 a3 70 3d 0a d7 a3 41 bb 64 00 00 00 41 0f af c2 45 31 d2 44 89 d1 <f7> f7 85 c0 41 0 f 48 c2 48 63 f0 83 fe 64 49 0f 4f f1 89 35 b3 -- To unsubscribe from this list: send the line "unsubscribe cpufreq" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
