Live-Updating Xen: Difference between revisions
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* kexec work merged for v2.0.20 |
* kexec work merged for v2.0.20 |
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* PV domU serialization work ongoing |
* PV domU serialization work ongoing |
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Initial proof-of-concept (no kexec): |
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Save a PV domain state, leave guest memory in the RAM: |
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# xl save -s domU domU.img |
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Restore domain state reusing magic mfns. The shared_info page contents are preserved: |
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# xl restore -T domain.img <l3tab_mfn> <l2tab_mfn> <shared_info_mfn> |
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TODO: Restore console, reconstruct guest pagetables from shared_info. |
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== TODO == |
== TODO == |
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Revision as of 13:44, 10 July 2019
Live-Updating Xen
Current State
- kexec work merged for v2.0.20
- PV domU serialization work ongoing
Initial proof-of-concept (no kexec): Save a PV domain state, leave guest memory in the RAM: # xl save -s domU domU.img Restore domain state reusing magic mfns. The shared_info page contents are preserved: # xl restore -T domain.img <l3tab_mfn> <l2tab_mfn> <shared_info_mfn> TODO: Restore console, reconstruct guest pagetables from shared_info.
TODO
This list will move to the JIRA instance
- Devel milestone: PV domU persists across domain destroy/create
- Dom0 persists across kexec
- HVM guests persist across kexec
- PV guests persist across kexec
- One guest persists across kexec
- Multiple guests persist across kexec
- Guests exercise workloads
- Update to same Xen binary as the Target Xen
- Update to a Xen binary with a minor change, like a new printk
- Update to a Xen binary with a fix for an XSA
- Update to a new minor version
- Update to a new major version
More information
- Slides from Xen Summit 2019
- Video recording of the Xen Summit 2019 talk
- Development trees:
http://git.infradead.org/users/dwmw2/xen.git/shortlog/refs/heads/bootcleanup
