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Message-ID: <2179243.rz3pEnzpnU@vostro.rjw.lan> Date: Wed, 06 Mar 2013 01:35:19 +0100 From: "Rafael J. Wysocki" <rjw@...k.pl> To: Dirk Brandewie <dirk.brandewie@...il.com> Cc: Konrad Rzeszutek Wilk <konrad.wilk@...cle.com>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>, "linux-acpi@...r.kernel.org" <linux-acpi@...r.kernel.org>, "rafael.j.wysocki@...el.com" <rafael.j.wysocki@...el.com>, "xen-devel@...ts.xensource.com" <xen-devel@...ts.xensource.com> Subject: Re: intel-pstate driver blows up if cpufreq_register_driver fails. On Tuesday, March 05, 2013 04:21:12 PM Dirk Brandewie wrote: > On Tuesday, March 5, 2013, Rafael J. Wysocki wrote: > > > Hi, > > > > Thanks for the report! > > > > Dirk, can you please have a look at that? > > > The patch for this should be some where deeper in your inbox Found it, thanks! Rafael > > On Tuesday, March 05, 2013 01:25:41 PM Konrad Rzeszutek Wilk wrote: > > > This is what we get: > > > > > > [ 14.429235] calling intel_pstate_init+0x0/0x14d @ 1^M^M > > > [ 14.434268] Intel P-state driver initializing.^M^M > > > [ 14.438775] BUG: unable to handle kernel NULL pointer dereference at > > 0000000000000030^M^M > > > [ 14.446649] IP: [<ffffffff8121a254>] sysfs_remove_group+0x14/0x100^M^M > > > [ 14.452889] PGD 0 ^M^M > > > [ 14.454968] Oops: 0000 [#1] SMP ^M^M > > > [ 14.458261] Modules linked in:^M^M > > > [ 14.461382] CPU 0 ^M^M > > > [ 14.463204] Pid: 1, comm: swapper/0 Not tainted > > 3.9.0-rc1upstream-00021-g9e952b4-dirty #8 MSI MS-7680/H61M-P23 (MS-7680)^M^M > > > [ 14.474382] RIP: e030:[<ffffffff8121a254>] [<ffffffff8121a254>] > > sysfs_remove_group+0x14/0x100^M^M > > > [ 14.483048] RSP: e02b:ffff8801e3489e58 EFLAGS: 00010296^M^M > > > [ 14.488422] RAX: 00000000ffffffed RBX: ffffffff81a7cd80 RCX: > > 0000000000000000^M^M > > > [ 14.495614] RDX: 0000000000000000 RSI: ffffffff81a7cd80 RDI: > > 0000000000000000^M^M > > > [ 14.502806] RBP: ffff8801e3489e78 R08: 0000000000000001 R09: > > 0000000000000008^M^M > > > [ 14.510001] R10: 0000000000000008 R11: 00000000fffffffa R12: > > 0000000000000000^M^M > > > [ 14.517194] R13: ffffffff81afac08 R14: 000000014c7ca386 R15: > > 0000000000000000^M^M > > > [ 14.524389] FS: 00007f49debd2700(0000) GS:ffff8801f0e00000(0000) > > knlGS:0000000000000000^M^M > > > [ 14.532532] CS: e033 DS: 0000 ES: 0000 CR0: 0000000080050033^M^M > > > [ 14.538340] CR2: 0000000000000030 CR3: 0000000001a0c000 CR4: > > 0000000000042660^M^M > > > [ 14.545531] DR0: 0000000000000000 DR1: 0000000000000000 DR2: > > 0000000000000000^M^M > > > [ 14.552724] DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: > > 0000000000000400^M^M > > > [ 14.559918] Process swapper/0 (pid: 1, threadinfo ffff8801e3488000, > > task ffff8801e347c800)^M^M > > > [ 14.568237] Stack:^M^M > > > [ 14.570316] 00000000ffffffed ffffffff81a9d520 ffffffff81afac08 > > 000000014c7ca386^M^M > > > [ 14.577771] ffff8801e3489ea8 ffffffff814e8690 00000000ffffffff > > 00000000ffffffed^M^M > > > [ 14.585223] ffffffff81a9d520 ffffffff81afac08 ffff8801e3489ec8 > > ffffffff81afad42^M^M > > > [ 14.592677] Call Trace:^M^M > > > [ 14.595193] [<ffffffff81afac08>] ? cpufreq_p4_init+0x55/0x55^M^M > > > [ 14.601000] [<ffffffff814e8690>] intel_pstate_exit+0x20/0xd0^M^M > > > [ 14.606805] [<ffffffff81afac08>] ? cpufreq_p4_init+0x55/0x55^M^M > > > [ 14.612612] [<ffffffff81afad42>] intel_pstate_init+0x13a/0x14d^M^M > > > [ 14.618593] [<ffffffff81002124>] do_one_initcall+0x124/0x170^M^M > > > [ 14.624396] [<ffffffff81ac1a03>] kernel_init_freeable+0x157/0x1e6^M^M > > > [ 14.630635] [<ffffffff81ac1a92>] ? > > kernel_init_freeable+0x1e6/0x1e6^M^M > > > [ 14.637050] [<ffffffff8165add0>] ? rest_init+0xa0/0xa0^M^M > > > [ 14.642337] [<ffffffff8165add9>] kernel_init+0x9/0xf0^M^M > > > [ 14.647538] [<ffffffff8167c9fc>] ret_from_fork+0x7c/0xb0^M^M > > > [ 14.652998] [<ffffffff8165add0>] ? rest_init+0xa0/0xa0^M^M > > > [ 14.658282] Code: 1f 84 00 00 00 00 00 55 48 89 f2 31 f6 48 89 e5 e8 > > e2 fd ff ff c9 c3 55 48 89 e5 41 56 41 55 41 54 49 89 fc 53 48 8b 16 48 89 > > f3 <4c> 8b 77 30 48 85 d2 0f 84 87 00 00 00 31 f6 4c 89 f7 e8 d5 e3 ^M^M > > > [ 14.677174] RIP [<ffffffff8121a254>] > > sysfs_remove_group+0x14/0x100^M^M > > > [ 14.683498] RSP <ffff8801e3489e58>^M^M > > > [ 14.687052] CR2: 0000000000000030^M^M > > > [ 14.690450] ---[ end trace 104ea7a191a991d2 ]---^M^M > > > [ 14.695120] swapper/0 (1) used greatest stack depth: 3688 bytes > > left^M^M > > > [ 14.701532] Kernel panic - not syncing: Attempted to kill init! > > exitcode=0x00000009^M^M > > > > > > > > > The cpufreq is disabled, so we end up with: > > > > > > 797 rc = cpufreq_register_driver(&intel_pstate_driver); > > > 798 if (rc) > > > 799 goto out; > > > 800 > > > 801 intel_pstate_debug_expose_params(); > > > 802 intel_pstate_sysfs_expose_params(); > > > 803 return rc; > > > 804 out: > > > 805 intel_pstate_exit(); > > > 806 > -- > > > To unsubscribe from this list: send the line "unsubscribe linux-acpi" in > > > the body of a message to majordomo@...r.kernel.org <javascript:;> > > > More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- > > I speak only for myself. > > Rafael J. Wysocki, Intel Open Source Technology Center. > > -- I speak only for myself. Rafael J. Wysocki, Intel Open Source Technology Center. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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