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Groups > linux.debian.kernel > #60023
| From | "Michael J. Redd" <micredd@gmail.com> |
|---|---|
| Newsgroups | linux.debian.bugs.dist, linux.debian.kernel |
| Subject | Bug#887676: Stretch kernel 4.9.0-5-amd64 breaks Xen PVH support |
| Date | 2018-01-19 01:40 +0100 |
| Message-ID | <v9sSR-4vQ-1@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
Cross-posted to 2 groups.
Package: linux-image-amd64 Version: 4.9+80+deb9u Not sure if this needs to go to the Debian Kernel team or Debian Xen team, so please feel free to reclassify as necessary. I'm leaning toward this being a kernel bug, as the Xen packages had not changed when this issue was introduced; only the kernel changed. Description: ============ Latest Stretch kernel (4.9.0-5-amd64), released per DSA-4082-1, breaks Xen PVH domU support. Booting the domU with pvh = '1' set in its config file gets the boot process as far as pyGRUB, but once the kernel itself begins to boot, the domU immediately crashes. Even with 'quiet' removed from the kernel's boot options, the kernel outputs nothing before it dies. Thinking this was possibly the work of the Meltdown mitigation, I added `pti=off` to the domU's kernel boot options. No effect. Steps to reproduce: =================== 1. Run Xen PV domU in PVH mode (PVH = '1' in domU config file), 2. Upgrade domU's kernel from 4.9.0-4-amd64 to 4.9.0-5-amd64, 3. Reboot domU using latest kernel. Workaround: =========== I could find no workaround with this kernel. I either had to disable Xen PVH mode (set PVH = '0') for the domU or roll back to using kernel 4.9.0-4-amd64. Setup: ====== - Dom0 kernel: 4.9.0-5-amd64 - DomU kernel: 4.9.0-5-amd64 - Xen hypervisor version: xen-hypervisor-4.8-amd64 (4.8.2+xsa245- 0+deb9u1)
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Bug#887676: Stretch kernel 4.9.0-5-amd64 breaks Xen PVH support "Michael J. Redd" <micredd@gmail.com> - 2018-01-19 01:40 +0100
Bug#887676: Stretch kernel 4.9.0-5-amd64 breaks Xen PVH support Hans van Kranenburg <hans@knorrie.org> - 2018-01-19 22:50 +0100
Bug#887676: Stretch kernel 4.9.0-5-amd64 breaks Xen PVH support "Michael J. Redd" <micredd@gmail.com> - 2018-01-20 19:20 +0100
Processed (with 1 error): Re: Bug#887676: Stretch kernel 4.9.0-5-amd64 breaks Xen PVH support "Debian Bug Tracking System" <owner@bugs.debian.org> - 2018-01-19 22:50 +0100
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