From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nikola Ciprich Subject: kvm-85 sometimes not starting on 2.6.30-rc5 Date: Wed, 13 May 2009 21:22:49 +0200 Message-ID: <20090513192249.GA5760@nik-comp.linuxbox.cz> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: nikola.ciprich@linuxbox.cz To: KVM list Return-path: Received: from gwu.lbox.cz ([62.245.111.132]:60554 "EHLO gwu.lbox.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760676AbZEMTV2 (ORCPT ); Wed, 13 May 2009 15:21:28 -0400 Received: from linuxbox.linuxbox.cz (server.linuxbox.cz [10.76.66.10]) by gwu.lbox.cz (Sendmail) with ESMTP id n4DJLSCu024597 for ; Wed, 13 May 2009 21:21:28 +0200 Content-Disposition: inline Sender: kvm-owner@vger.kernel.org List-ID: Hi, sometimes trying to start kvm on 2.6.30-rc5 (with kvm module v85, userspace v85) fails with: kvm_create_vm: Interrupted system call Could not create KVM context and following backtrace appears in dmesg: [ 309.546138] BUG: MAX_LOCK_DEPTH too low! [ 309.549964] turning off the locking correctness validator. [ 309.549964] Pid: 2833, comm: qemu-kvm Not tainted 2.6.30lb.00_01_PRE08 #1 [ 309.549964] Call Trace: [ 309.549964] [] __lock_acquire+0x4a9/0xb70 [ 309.549964] [] ? mm_take_all_locks+0x2f/0x130 [ 309.549964] [] lock_acquire+0xa5/0x150 [ 309.549964] [] ? mm_take_all_locks+0xec/0x130 [ 309.549964] [] _spin_lock_nest_lock+0x36/0x50 [ 309.549964] [] ? mm_take_all_locks+0xec/0x130 [ 309.549964] [] mm_take_all_locks+0xec/0x130 [ 309.549964] [] do_mmu_notifier_register+0x7b/0x1d0 [ 309.549964] [] mmu_notifier_register+0xe/0x10 [ 309.549964] [] kvm_dev_ioctl+0x189/0x2f0 [kvm] [ 309.549964] [] vfs_ioctl+0x31/0x90 [ 309.549964] [] do_vfs_ioctl+0x22b/0x550 [ 309.549964] [] sys_ioctl+0x82/0xa0 [ 309.549964] [] system_call_fastpath+0x16/0x1b It happened to me when I didn't have storage with kernel mounted. Further attempts are usually successfull. BR nik -- ------------------------------------- Nikola CIPRICH LinuxBox.cz, s.r.o. 28. rijna 168, 709 01 Ostrava tel.: +420 596 603 142 fax: +420 596 621 273 mobil: +420 777 093 799 www.linuxbox.cz mobil servis: +420 737 238 656 email servis: servis@linuxbox.cz -------------------------------------