https://bugzilla.kernel.org/show_bug.cgi?id=63121 Bug ID: 63121 Summary: The guest will hang after live migration. Product: Virtualization Version: unspecified Kernel Version: 3.12.0-rc2 Hardware: All OS: Linux Tree: Mainline Status: NEW Severity: normal Priority: P1 Component: kvm Assignee: virtualization_kvm@xxxxxxxxxxxxxxxxxxxx Reporter: chao.zhou@xxxxxxxxx Regression: No Environment: ------------ Host OS (ia32/ia32e/IA64):ia32e Guest OS (ia32/ia32e/IA64):ia32e Guest OS Type (Linux/Windows):Linux kvm.git Commit:7854cbca815562a49d50bbc6f31599312853d1f4 qemu.git Commit:1cdae4573d7613149348d834c605bfbe3c7d405b Host Kernel Version:3.12.0-rc2 Bug detailed description: -------------------------- after guest live migration, the guest will hang, and in command line some message about "KVM: entry failed, hardware error 0x80000021" will print note: 1. after guest save/restore, the guest will hang 2. This should be a kernel bug kvm + qemu = result 7854cbca + 1cdae457 = bad 2f303b74 + 1cdae457 = good Reproduce steps: ---------------- 1.Start a TCP daemon for migration qemu-system-x86_64 -enable-kvm -m 2048 -smp 2 -net none /root/rhel6u4.qcow 2. create guest qemu-system-x86_64 -enable-kvm -m 2048 -smp 2 -net none /root/rhel6u4.qcow -incoming tcp:localhost:4444 3. ctrl+alt+2 to change to qemu monitor 4. migrate tcp:localhost:4444 Current result: ---------------- guest hang, and print "KVM: entry failed, hardware error 0x80000021" Expected result: ---------------- after live/migration or save/restore, the guest works fine Basic root-causing log: ---------------------- after live/migration or save/restore, the command line will print: KVM: entry failed, hardware error 0x80000021 If you're running a guest on an Intel machine without unrestricted mode support, the failure can be most likely due to the guest entering an invalid state for Intel VT. For example, the guest maybe running in big real mode which is not supported on less recent Intel processors. EAX=00000000 EBX=00000000 ECX=00000000 EDX=00000000 ESI=00000001 EDI=81de1228 EBP=81a01ec8 ESP=81a01ec8 EIP=8103b90b EFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 00000000 0000ffff 00009300 CS =f000 ffff0000 0000ffff 00009b00 SS =0000 00000000 0000ffff 00009300 DS =0000 00000000 0000ffff 00009300 FS =0000 00000000 0000ffff 00009300 GS =0000 00000000 0000ffff 00009300 LDT=0000 00000000 0000ffff 00008200 TR =0000 00000000 0000ffff 00008b00 GDT= 00000000 0000ffff IDT= 00000000 0000ffff CR0=60000010 CR2=00000000 CR3=00000000 CR4=00000000 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000000 Code=00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 <00> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 -- 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
