https://bugzilla.kernel.org/show_bug.cgi?id=84781
Bug ID: 84781
Summary: The guest will hang after live migration.
Product: Virtualization
Version: unspecified
Kernel Version: 3.17.0-rc1
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: kvm
Assignee: [email protected]
Reporter: [email protected]
Regression: No
Environment:
------------
Host OS (ia32/ia32e/IA64):ia32e
Guest OS (ia32/ia32e/IA64):ia32e
Guest OS Type (Linux/Windows):Linux
kvm.git Commit:fd2752352bbc98850d83b5448a288d8991590317
qemu.git Commit:e4d50d47a9eb15f42bdd561803a29a4d7c3eb8ec
Host Kernel Version:3.17.0-rc1
Hardware:Ivytown_EP, Haswell_EP
Bug detailed description:
--------------------------
after guest live migration, the guest will hang, and ping guest's fail.
note:
1. after guest save/restore, the guest will hang
2. This should be a kernel bug
kvm + qemu = result
fd275235 + e4d50d47 = bad
c77dcacb + e4d50d47 = good
Reproduce steps:
----------------
1.Start a TCP daemon for migration
qemu-system-x86_64 -enable-kvm -m 4G -smp 4 -net nic,macaddr=00:12:31:45:41:23
-net tap,script=/etc/kvm/qemu-ifup rhel6u5.qcow -incoming tcp:localhost:4444
2. create guest
qemu-system-x86_64 -enable-kvm -m 4G -smp 4 -net nic,macaddr=00:12:31:45:41:23
-net tap,script=/etc/kvm/qemu-ifup rhel6u5.qcow
3. ctrl+alt+2 to change to qemu monitor
4. migrate tcp:localhost:4444
Current result:
----------------
guest hang after live migration or save/restore.
Expected result:
----------------
after live/migration or save/restore, the guest works fine.
Basic root-causing log:
----------------------
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