From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tomasz Chmielewski Subject: Re: Houston, we have May 15, 1953 (says guest when host uses cpufreq, and dies) Date: Sat, 07 Mar 2009 15:59:07 +0100 Message-ID: <49B28BBB.4010308@wpkg.org> References: <499C206A.5050109@wpkg.org> <20090218184611.GG25719@amt.cnet> <499C5917.4010700@wpkg.org> <20090218185734.GA26408@amt.cnet> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org To: Marcelo Tosatti Return-path: Received: from mx03.syneticon.net ([78.111.66.105]:45269 "EHLO mx03.syneticon.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753907AbZCGO7e (ORCPT ); Sat, 7 Mar 2009 09:59:34 -0500 In-Reply-To: <20090218185734.GA26408@amt.cnet> Sender: kvm-owner@vger.kernel.org List-ID: Marcelo Tosatti schrieb: >> flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext fxsr_opt rdtscp lm 3dnowext 3dnow rep_good pni cx16 lahf_lm cmp_legacy svm extapic cr8_legacy >> bogomips : 3993.20 >> TLB size : 1024 4K pages >> clflush size : 64 >> cache_alignment : 64 >> address sizes : 40 bits physical, 48 bits virtual >> power management: ts fid vid ttp tm stc > > kvm-84 as mentioned. Sorry. > It is not stable for me (although I did go through exactly the same routine with kvm-83) - I got an oops. I'm not sure if the problem is kvm or cpufreq. This is what I did: - stopped all kvm-83 guests, removed all kvm-83 modules - inserted kvm-83 modules, started 9 guests with kvm-84 binary - inserted cpufreq modules and set the governor to ondemand - cat /proc/cpuinfo revealed that CPUs are still running at full speed, so I did: cat /sys/devices/system/cpu/cpu2/cpufreq/scaling_governor but it didn't return and cat was in "D" state. - I stopped all guests, removed kvm-84 modules, and got this oops: Unable to handle kernel paging request at ffffffff88429721 RIP: [] PGD 203067 PUD 207063 PMD 1184dc067 PTE 0 Oops: 0010 [1] PREEMPT SMP CPU: 0 Modules linked in: loop cpufreq_ondemand powernow_k8 freq_table crc32c libcrc32c vzethdev vznetdev simfs vzrst vzcpt tun vzdquota vzmon ipv6 vzdev xt_tcpudp xt_length ipt_ttl xt_tcpmss xt_TCPMSS iptable_mangle iptable_filter xt_multiport xt_limit ipt_tos ipt_REJECT ip_tables x_tables ib_iser rdma_cm ib_cm iw_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp libiscsi scsi_transport_iscsi bridge 8021q bonding dm_snapshot dm_mirror dm_multipath dm_mod joydev usbhid hid sata_svw pata_serverworks psmouse ehci_hcd ohci_hcd evdev thermal button ata_generic pata_acpi serio_raw i2c_piix4 tg3 container pcspkr libata usbcore processor i2c_core ssb shpchp pci_hotplug k8temp romfs isofs sd_mod sg mptsas mptscsih mptbase scsi_transport_sas scsi_mod raid1 md_mod Pid: 20389, comm: kondemand/0 Not tainted 2.6.24-2-pve #1 ovz005 RIP: 0010:[] [] RSP: 0018:ffff810039d09d20 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 00000000ef41d1f5 RCX: ffffffff806cf690 RDX: 0000000000000000 RSI: ffff810080959000 RDI: ffffffff88450e80 RBP: 0000000000000000 R08: 00000000001e8480 R09: 0000000000000000 R10: ffff810001027ee0 R11: 0000000000000001 R12: ffffffff88450e90 R13: ffff810039d09df0 R14: 0000000000000000 R15: 0000000000000000 FS: 00007f93a7d736d0(0000) GS:ffffffff8060b000(0000) knlGS:0000000000000000 CS: 0010 DS: 0018 ES: 0018 CR0: 000000008005003b CR2: ffffffff88429721 CR3: 0000000000201000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process kondemand/0 (pid: 20389, veid=0, threadinfo ffff810039d08000, task ffff810039d06000) Stack: 00000000ef41d1f5 0000000000000000 ffffffff88451950 ffff810039d09df0 0000000000000001 ffffffff804aa671 ffffffff8077b1f0 ffff810039d09df0 0000000000000000 00000000ffffffff ffffffff8077b1c0 ffffffff8025ca0a Call Trace: [] notifier_call_chain+0x51/0x70 [] __srcu_notifier_call_chain+0x5a/0x90 [] cpufreq_notify_transition+0x7d/0xb0 [] :powernow_k8:powernowk8_target+0x2bf/0x690 [] :cpufreq_ondemand:do_dbs_timer+0x26a/0x300 [] :cpufreq_ondemand:do_dbs_timer+0x0/0x300 [] run_workqueue+0x88/0x120 [] worker_thread+0x0/0x130 [] worker_thread+0xc5/0x130 [] autoremove_wake_function+0x0/0x30 [] worker_thread+0x0/0x130 [] worker_thread+0x0/0x130 [] kthread+0x4b/0x80 [] child_rip+0xa/0x12 [] kthread+0x0/0x80 [] child_rip+0x0/0x12 Code: Bad RIP value. RIP [] RSP CR2: ffffffff88429721 ---[ end trace e6b0e16fe814aeb1 ]--- note: kondemand/0[20389] exited with preempt_count 1 -- Tomasz Chmielewski http://wpkg.org