https://bugzilla.kernel.org/show_bug.cgi?id=59521 --- Comment #1 from Eugene Batalov <eabatalov89@xxxxxxxxx> 2013-06-11 16:03:55 --- I have reconstructed the uninitialized pvclock read backtrace. References to file lines are for Ubuntu-raring kernel git://kernel.ubuntu.com/ubuntu/ubuntu-raring.git tag is Ubuntu-3.8.0-19.30 bp: 0xf3ccbe68 ip: 0xc103cfbd arch/x86/include/asm/pvclock.h:78 arch/x86/kernel/pvclock.c:74 bp: 0xf3ccbe70 ip: 0xc103c057 arch/x86/kernel/kvmclock.c:91 bp: 0xf3ccbe78 ip: 0xc1017598 arch/x86/kernel/tsc.c:58 bp: 0xf3ccbea8 ip: 0xc107e98d kernel/sched/clock.c:248 bp: 0xf3ccbeb8 ip: 0xc107ea35 kernel/sched/clock.c:342 bp: 0xf3ccbf08 ip: 0xc104ad85 kernel/printk.c:356 bp: 0xf3ccbf50 ip: 0xc104c4e1 kernel/printk.c:1607 bp: 0xf3ccbf70 ip: 0xc1609bb6 kernel/printk.c:1688 bp: 0xf3ccbf90 ip: 0xc1600a51 arch/x86/include/asm/bitops.h:321 arch/x86/kernel/cpu/common.c:1325 bp: 0xf3ccbfb4 ip: 0xc1604000 ?? bp: 0x00000000 kernel/printk.c:356 calls local_clock() calls sched_clock_cpu() calls sched_clock() calls paravirt_sched_clock() calls indirectly kvm_clock_read() unintialized pv_clock is read here vcpu kvmclock initialization is performed in kvm_register_clock. kvm_register_clock is called from static void __init kvm_smp_prepare_boot_cpu(void) called form ./init/main.c:524 as smp_prepare_boot_cpu I'll think about proper fix soon. We probably should fix cpu initialization stages order or disable usage of pvclock before it initialized. -- Configure bugmail: https://bugzilla.kernel.org/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are watching the assignee of the bug. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
