Bionic x86_64 Linux Kernel 4.15 fails to boot on Xen

Bug #1752350 reported by Johannes Krude on 2018-02-28
16
This bug affects 3 people
Affects Status Importance Assigned to Milestone
linux (Ubuntu)
High
Joseph Salisbury
Bionic
High
Joseph Salisbury

Bug Description

The Linux Kernel 4.15 from bionic on x86_64 immediately crashes when booted as a dom0 under Xen.

A similar bug was reported by someone else for archlinux (https://bugs.archlinux.org/task/57500).

A patch exists for 4.16. I tried this patch on 4.15.0-10-generic, it fixes the problem for me. (https://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git/patch/?id=4f277295e54c5b7340e48efea3fc5cc21a2872b7).

Xen output:

(XEN) Xen version 4.9.0 (Ubuntu 4.9.0-0ubuntu3) (<email address hidden>) (gcc (Ubuntu 7.2.0-8ubuntu2) 7.2.0) debug=n Fri Oct 13 15:58:41 UTC 2017
(XEN) Bootloader: GRUB 2.02~beta2-36ubuntu3.9
(XEN) Command line: placeholder com1=115200,8N1 console=com1,vga
(XEN) Xen image load base address: 0
(XEN) Video information:
(XEN) VGA is text mode 80x25, font 8x16
(XEN) VBE/DDC methods: none; EDID transfer time: 0 seconds
(XEN) EDID info not retrieved because no DDC retrieval method detected
(XEN) Disc information:
(XEN) Found 1 MBR signatures
(XEN) Found 1 EDD information structures
(XEN) Xen-e820 RAM map:
(XEN) 0000000000000000 - 000000000009ec00 (usable)
(XEN) 00000000000f0000 - 0000000000100000 (reserved)
(XEN) 0000000000100000 - 00000000cb6cfc00 (usable)
(XEN) 00000000cb6cfc00 - 00000000cb723c00 (ACPI NVS)
(XEN) 00000000cb723c00 - 00000000cb725c00 (ACPI data)
(XEN) 00000000cb725c00 - 00000000cc000000 (reserved)
(XEN) 00000000f8000000 - 00000000fc000000 (reserved)
(XEN) 00000000fec00000 - 00000000fed00400 (reserved)
(XEN) 00000000fed20000 - 00000000feda0000 (reserved)
(XEN) 00000000fee00000 - 00000000fef00000 (reserved)
(XEN) 00000000ffb00000 - 0000000100000000 (reserved)
(XEN) 0000000100000000 - 0000000130000000 (usable)
(XEN) New Xen image base address: 0xcb000000
(XEN) ACPI: RSDP 000FEC00, 0024 (r2 DELL )
(XEN) ACPI: XSDT 000FC7E7, 006C (r1 DELL B11K 15 ASL 61)
(XEN) ACPI: FACP 000FC8D7, 00F4 (r3 DELL B11K 15 ASL 61)
(XEN) ACPI: DSDT FFDC89E4, 47BC (r1 DELL dt_ex 1000 INTL 20050624)
(XEN) ACPI: FACS CB6CFC00, 0040
(XEN) ACPI: SSDT FFDCD2C1, 00AC (r1 DELL st_ex 1000 INTL 20050624)
(XEN) ACPI: APIC 000FC9CB, 0092 (r1 DELL B11K 15 ASL 61)
(XEN) ACPI: BOOT 000FCA5D, 0028 (r1 DELL B11K 15 ASL 61)
(XEN) ACPI: ASF! 000FCA85, 0096 (r32 DELL B11K 15 ASL 61)
(XEN) ACPI: MCFG 000FCB1B, 003E (r1 DELL B11K 15 ASL 61)
(XEN) ACPI: HPET 000FCB59, 0038 (r1 DELL B11K 15 ASL 61)
(XEN) ACPI: TCPA 000FCDB5, 0032 (r1 DELL B11K 15 ASL 61)
(XEN) ACPI: DMAR 000FCDE7, 0068 (r1 DELL B11K 15 ASL 61)
(XEN) System RAM: 4022MB (4118964kB)
(XEN) Domain heap initialised
(XEN) IOAPIC[0]: apic_id 8, version 32, address 0xfec00000, GSI 0-23
(XEN) Enabling APIC mode: Flat. Using 1 I/O APICs
(XEN) Using scheduler: SMP Credit Scheduler (credit)
(XEN) Platform timer is 14.318MHz HPET
(XEN) Detected 2926.007 MHz processor.
(XEN) Initing memory sharing.
(XEN) Intel VT-d iommu 0 supported page sizes: 4kB.
(XEN) Intel VT-d Snoop Control enabled.
(XEN) Intel VT-d Dom0 DMA Passthrough not enabled.
(XEN) Intel VT-d Queued Invalidation enabled.
(XEN) Intel VT-d Interrupt Remapping not enabled.
(XEN) Intel VT-d Posted Interrupt not enabled.
(XEN) Intel VT-d Shared EPT tables not enabled.
(XEN) 0000:04:00.0: unknown type 4
(XEN) I/O virtualisation enabled
(XEN) - Dom0 mode: Relaxed
(XEN) Interrupt remapping disabled
(XEN) ENABLING IO-APIC IRQs
(XEN) -> Using new ACK method
(XEN) Allocated console ring of 16 KiB.
(XEN) VMX: Supported advanced features:
(XEN) - APIC MMIO access virtualisation
(XEN) - APIC TPR shadow
(XEN) - Extended Page Tables (EPT)
(XEN) - Virtual-Processor Identifiers (VPID)
(XEN) - Virtual NMI
(XEN) - MSR direct-access bitmap
(XEN) HVM: ASIDs enabled.
(XEN) HVM: VMX enabled
(XEN) HVM: Hardware Assisted Paging (HAP) detected
(XEN) HVM: HAP page sizes: 4kB, 2MB
(XEN) Brought up 4 CPUs
(XEN) Dom0 has maximum 600 PIRQs
(XEN) *** LOADING DOMAIN 0 ***
(XEN) Xen kernel: 64-bit, lsb, compat32
(XEN) Dom0 kernel: 64-bit, PAE, lsb, paddr 0x1000000 -> 0x2b69000
(XEN) PHYSICAL MEMORY ARRANGEMENT:
(XEN) Dom0 alloc.: 0000000120000000->0000000124000000 (952940 pages to be allocated)
(XEN) Init. ramdisk: 000000012d251000->000000012ffff575
(XEN) VIRTUAL MEMORY ARRANGEMENT:
(XEN) Loaded kernel: ffffffff81000000->ffffffff82b69000
(XEN) Init. ramdisk: 0000000000000000->0000000000000000
(XEN) Phys-Mach map: 0000008000000000->000000800077c0d8
(XEN) Start info: ffffffff82b69000->ffffffff82b694b4
(XEN) Page tables: ffffffff82b6a000->ffffffff82b85000
(XEN) Boot stack: ffffffff82b85000->ffffffff82b86000
(XEN) TOTAL: ffffffff80000000->ffffffff83000000
(XEN) ENTRY ADDRESS: ffffffff826a3180
(XEN) Dom0 has maximum 4 VCPUs
(XEN) setup 0000:04:00.0 for d0 failed (-22)
(XEN) Scrubbing Free RAM on 1 nodes using 4 CPUs
(XEN) ..........done.
(XEN) Initial low memory virq threshold set at 0x4000 pages.
(XEN) Std. Loglevel: Errors and warnings
(XEN) Guest Loglevel: Nothing (Rate-limited: Errors and warnings)
(XEN) Xen is relinquishing VGA console.
(XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to Xen)
(XEN) Freed 460kB init memory
(XEN) d0v0 Unhandled page fault fault/trap [#14, ec=0000]
(XEN) Pagetable walk from 0000000000000028:
(XEN) L4[0x000] = 0000000000000000 ffffffffffffffff
(XEN) domain_crash_sync called from entry.S: fault at ffff82d080345308 entry.o#create_bounce_frame+0x135/0x14d
(XEN) Domain 0 (vcpu#0) crashed on cpu#0:
(XEN) ----[ Xen-4.9.0 x86_64 debug=n Not tainted ]----
(XEN) CPU: 0
(XEN) RIP: e033:[<ffffffff8103fbfb>]
(XEN) RFLAGS: 0000000000000292 EM: 1 CONTEXT: pv guest (d0v0)
(XEN) rax: 0000000000000000 rbx: ffffffff81e06020 rcx: 0000000000000000
(XEN) rdx: 0000000000000000 rsi: ffffffff82403e90 rdi: ffffffff82403e8c
(XEN) rbp: ffffffff82403ec8 rsp: ffffffff82403e10 r8: ffffffff82403f00
(XEN) r9: 00000000ffffffff r10: ffffffff82403f04 r11: 0000000000000000
(XEN) r12: ffffffff82403e88 r13: ffffffff82403e78 r14: ffffffff82403e80
(XEN) r15: ffffffff82403e84 cr0: 000000008005003b cr4: 00000000000026e0
(XEN) cr3: 0000000122b6a000 cr2: 0000000000000028
(XEN) ds: 0000 es: 0000 fs: 0000 gs: 0000 ss: e02b cs: e033
(XEN) Guest stack trace from rsp=ffffffff82403e10:
(XEN) 0000000000000000 0000000000000000 0000000000000000 ffffffff8103fbfb
(XEN) 000000010000e030 0000000000010092 ffffffff82403e58 000000000000e02b
(XEN) 0000000000000000 ffffffff82659760 0000000000000000 0000000000000000
(XEN) 0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN) 0000000000000000 0000000000000000 ffffffff82659760 ffffffff82403f04
(XEN) ffffffff82403f00 ffffffff82403efc ffffffff82403ef8 ffffffff82403f40
(XEN) ffffffff810407e9 ffffffff82403f10 ffffffff82403f0c ffffffff82403f08
(XEN) ffffffff82403f14 0000000000003024 0000000000000000 0000000080000008
(XEN) 0000000000000000 ffffffff81032500 0000000000000000 0000000000000000
(XEN) 0000000000000000 0000000000000000 ffffffff82403ff8 ffffffff826ac360
(XEN) 0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN) 0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN) 0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN) 0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN) 0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN) 0000000000000000 0000000000000000 0f00000060c0c748 ccccccccccccc305
(XEN) cccccccccccccccc cccccccccccccccc cccccccccccccccc cccccccccccccccc
(XEN) cccccccccccccccc cccccccccccccccc cccccccccccccccc cccccccccccccccc
(XEN) cccccccccccccccc cccccccccccccccc cccccccccccccccc cccccccccccccccc
(XEN) cccccccccccccccc cccccccccccccccc cccccccccccccccc cccccccccccccccc
(XEN) Hardware Dom0 crashed: rebooting machine in 5 seconds.
(XEN) Xen version 4.9.0 (Ubuntu 4.9.0-0ubuntu3) (<email address hidden>) (gcc (Ubuntu 7.2.0-8ubuntu2) 7.2.0) debug=n Fri Oct 13 15:58:41 UTC 2017
(XEN) Bootloader: GRUB 2.02~beta2-36ubuntu3.9
(XEN) Command line: placeholder com1=115200,8N1 console=com1,vga
(XEN) Xen image load base address: 0
(XEN) Video information:
(XEN) VGA is text mode 80x25, font 8x16
(XEN) VBE/DDC methods: none; EDID transfer time: 0 seconds
(XEN) EDID info not retrieved because no DDC retrieval method detected
(XEN) Disc information:
(XEN) Found 1 MBR signatures
(XEN) Found 1 EDD information structures
(XEN) Xen-e820 RAM map:
(XEN) 0000000000000000 - 000000000009ec00 (usable)
(XEN) 00000000000f0000 - 0000000000100000 (reserved)
(XEN) 0000000000100000 - 00000000cb6cfc00 (usable)
(XEN) 00000000cb6cfc00 - 00000000cb723c00 (ACPI NVS)
(XEN) 00000000cb723c00 - 00000000cb725c00 (ACPI data)
(XEN) 00000000cb725c00 - 00000000cc000000 (reserved)
(XEN) 00000000f8000000 - 00000000fc000000 (reserved)
(XEN) 00000000fec00000 - 00000000fed00400 (reserved)
(XEN) 00000000fed20000 - 00000000feda0000 (reserved)
(XEN) 00000000fee00000 - 00000000fef00000 (reserved)
(XEN) 00000000ffb00000 - 0000000100000000 (reserved)
(XEN) 0000000100000000 - 0000000130000000 (usable)
(XEN) New Xen image base address: 0xcb000000
(XEN) ACPI: RSDP 000FEC00, 0024 (r2 DELL )
(XEN) ACPI: XSDT 000FC7E7, 006C (r1 DELL B11K 15 ASL 61)
(XEN) ACPI: FACP 000FC8D7, 00F4 (r3 DELL B11K 15 ASL 61)
(XEN) ACPI: DSDT FFDC89E4, 47BC (r1 DELL dt_ex 1000 INTL 20050624)
(XEN) ACPI: FACS CB6CFC00, 0040
(XEN) ACPI: SSDT FFDCD2C1, 00AC (r1 DELL st_ex 1000 INTL 20050624)
(XEN) ACPI: APIC 000FC9CB, 0092 (r1 DELL B11K 15 ASL 61)
(XEN) ACPI: BOOT 000FCA5D, 0028 (r1 DELL B11K 15 ASL 61)
(XEN) ACPI: ASF! 000FCA85, 0096 (r32 DELL B11K 15 ASL 61)
(XEN) ACPI: MCFG 000FCB1B, 003E (r1 DELL B11K 15 ASL 61)
(XEN) ACPI: HPET 000FCB59, 0038 (r1 DELL B11K 15 ASL 61)
(XEN) ACPI: TCPA 000FCDB5, 0032 (r1 DELL B11K 15 ASL 61)
(XEN) ACPI: DMAR 000FCDE7, 0068 (r1 DELL B11K 15 ASL 61)
(XEN) System RAM: 4022MB (4118964kB)
(XEN) Domain heap initialised
(XEN) IOAPIC[0]: apic_id 8, version 32, address 0xfec00000, GSI 0-23
(XEN) Enabling APIC mode: Flat. Using 1 I/O APICs
(XEN) Using scheduler: SMP Credit Scheduler (credit)
(XEN) Platform timer is 14.318MHz HPET
(XEN) Detected 2926.012 MHz processor.
(XEN) Initing memory sharing.
(XEN) Intel VT-d iommu 0 supported page sizes: 4kB.
(XEN) Intel VT-d Snoop Control enabled.
(XEN) Intel VT-d Dom0 DMA Passthrough not enabled.
(XEN) Intel VT-d Queued Invalidation enabled.
(XEN) Intel VT-d Interrupt Remapping not enabled.
(XEN) Intel VT-d Posted Interrupt not enabled.
(XEN) Intel VT-d Shared EPT tables not enabled.
(XEN) 0000:04:00.0: unknown type 4
(XEN) I/O virtualisation enabled
(XEN) - Dom0 mode: Relaxed
(XEN) Interrupt remapping disabled
(XEN) ENABLING IO-APIC IRQs
(XEN) -> Using new ACK method
(XEN) Allocated console ring of 16 KiB.
(XEN) VMX: Supported advanced features:
(XEN) - APIC MMIO access virtualisation
(XEN) - APIC TPR shadow
(XEN) - Extended Page Tables (EPT)
(XEN) - Virtual-Processor Identifiers (VPID)
(XEN) - Virtual NMI
(XEN) - MSR direct-access bitmap
(XEN) HVM: ASIDs enabled.
(XEN) HVM: VMX enabled
(XEN) HVM: Hardware Assisted Paging (HAP) detected
(XEN) HVM: HAP page sizes: 4kB, 2MB
(XEN) Brought up 4 CPUs
(XEN) Dom0 has maximum 600 PIRQs
(XEN) *** LOADING DOMAIN 0 ***
(XEN) Xen kernel: 64-bit, lsb, compat32
(XEN) Dom0 kernel: 64-bit, PAE, lsb, paddr 0x1000000 -> 0x2b69000
(XEN) PHYSICAL MEMORY ARRANGEMENT:
(XEN) Dom0 alloc.: 0000000120000000->0000000124000000 (952940 pages to be allocated)
(XEN) Init. ramdisk: 000000012d251000->000000012ffff575
(XEN) VIRTUAL MEMORY ARRANGEMENT:
(XEN) Loaded kernel: ffffffff81000000->ffffffff82b69000
(XEN) Init. ramdisk: 0000000000000000->0000000000000000
(XEN) Phys-Mach map: 0000008000000000->000000800077c0d8
(XEN) Start info: ffffffff82b69000->ffffffff82b694b4
(XEN) Page tables: ffffffff82b6a000->ffffffff82b85000
(XEN) Boot stack: ffffffff82b85000->ffffffff82b86000
(XEN) TOTAL: ffffffff80000000->ffffffff83000000
(XEN) ENTRY ADDRESS: ffffffff826a3180
(XEN) Dom0 has maximum 4 VCPUs
(XEN) setup 0000:04:00.0 for d0 failed (-22)
(XEN) Scrubbing Free RAM on 1 nodes using 4 CPUs
(XEN) ..........done.
(XEN) Initial low memory virq threshold set at 0x4000 pages.
(XEN) Std. Loglevel: Errors and warnings
(XEN) Guest Loglevel: Nothing (Rate-limited: Errors and warnings)
(XEN) Xen is relinquishing VGA console.
(XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to Xen)
(XEN) Freed 460kB init memory
(XEN) d0v0 Unhandled page fault fault/trap [#14, ec=0000]
(XEN) Pagetable walk from 0000000000000028:
(XEN) L4[0x000] = 0000000000000000 ffffffffffffffff
(XEN) domain_crash_sync called from entry.S: fault at ffff82d080345308 entry.o#create_bounce_frame+0x135/0x14d
(XEN) Domain 0 (vcpu#0) crashed on cpu#0:
(XEN) ----[ Xen-4.9.0 x86_64 debug=n Not tainted ]----
(XEN) CPU: 0
(XEN) RIP: e033:[<ffffffff8103fbfb>]
(XEN) RFLAGS: 0000000000000292 EM: 1 CONTEXT: pv guest (d0v0)
(XEN) rax: 0000000000000000 rbx: ffffffff81e06020 rcx: 0000000000000000
(XEN) rdx: 0000000000000000 rsi: ffffffff82403e90 rdi: ffffffff82403e8c
(XEN) rbp: ffffffff82403ec8 rsp: ffffffff82403e10 r8: ffffffff82403f00
(XEN) r9: 00000000ffffffff r10: ffffffff82403f04 r11: 0000000000000000
(XEN) r12: ffffffff82403e88 r13: ffffffff82403e78 r14: ffffffff82403e80
(XEN) r15: ffffffff82403e84 cr0: 000000008005003b cr4: 00000000000026e0
(XEN) cr3: 0000000122b6a000 cr2: 0000000000000028
(XEN) ds: 0000 es: 0000 fs: 0000 gs: 0000 ss: e02b cs: e033
(XEN) Guest stack trace from rsp=ffffffff82403e10:
(XEN) 0000000000000000 0000000000000000 0000000000000000 ffffffff8103fbfb
(XEN) 000000010000e030 0000000000010092 ffffffff82403e58 000000000000e02b
(XEN) 0000000000000000 ffffffff82659760 0000000000000000 0000000000000000
(XEN) 0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN) 0000000000000000 0000000000000000 ffffffff82659760 ffffffff82403f04
(XEN) ffffffff82403f00 ffffffff82403efc ffffffff82403ef8 ffffffff82403f40
(XEN) ffffffff810407e9 ffffffff82403f10 ffffffff82403f0c ffffffff82403f08
(XEN) ffffffff82403f14 0000000000003024 0000000000000000 0000000080000008
(XEN) 0000000000000000 ffffffff81032500 0000000000000000 0000000000000000
(XEN) 0000000000000000 0000000000000000 ffffffff82403ff8 ffffffff826ac360
(XEN) 0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN) 0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN) 0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN) 0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN) 0000000000000000 0000000000000000 0000000000000000 0000000000000000
(XEN) 0000000000000000 0000000000000000 0f00000060c0c748 ccccccccccccc305
(XEN) cccccccccccccccc cccccccccccccccc cccccccccccccccc cccccccccccccccc
(XEN) cccccccccccccccc cccccccccccccccc cccccccccccccccc cccccccccccccccc
(XEN) cccccccccccccccc cccccccccccccccc cccccccccccccccc cccccccccccccccc
(XEN) cccccccccccccccc cccccccccccccccc cccccccccccccccc cccccccccccccccc
(XEN) Hardware Dom0 crashed: rebooting machine in 5 seconds.

This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:

apport-collect 1752350

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the Ubuntu Kernel Team.

Changed in linux (Ubuntu):
status: New → Incomplete
tags: added: bionic
Johannes Krude (johannes314) wrote :

I can not run apport-collect on the affected system, since the kernel crashes immediately.

Changed in linux (Ubuntu):
status: Incomplete → Confirmed
Changed in linux (Ubuntu):
importance: Undecided → High
Changed in linux (Ubuntu Bionic):
assignee: nobody → Joseph Salisbury (jsalisbury)
status: Confirmed → In Progress
Joseph Salisbury (jsalisbury) wrote :

I built a test kernel with commit 4f277295e54c5b7340e48efea3fc5cc21a2872b7. The test kernel can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1752350

Can you test this kernel and see if it resolves this bug?

Note, to test this kernel, you need to install both the linux-image and linux-image-extra .deb packages.

Thanks in advance!

Alejandro Mery (amery) wrote :

@jsalisbury, I already have 4.15.0.11.12 installed... can you update your test kernel please?

Alejandro Mery (amery) wrote :

Hi Joseph, I removed 4.15.0.11.12 and installed yours.

Linux de2 4.15.0-10-generic #11~lp1752350 SMP Mon Mar 5 08:26:15 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux

when booting without Xen it works fine, but if I attempt to boot it as dom0 is "hangs" ... not sure if it's worse or better than the automatic reboot I had before. Unfortunately I can't get any useful output as it's on a machine on a datacenter attached to a kvm. I see Xen's output until it initialised the vCPUs and then it goes blank. I don't know how to get useful output to post here in this case

Joseph Salisbury (jsalisbury) wrote :

@Johanns, does my test kernel fail for you as well?

Johannes Krude (johannes314) wrote :

I think I will find some time later today to try it out.

Alejandro Mery (amery) wrote :

I wanted to mention that installing v4.16-rc4 from http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.16-rc4/ solved the problem for me.

# uname -a
Linux de2 4.16.0-041600rc4-generic #201803041930 SMP Mon Mar 5 00:32:34 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
# dmesg | grep Xen
...
[ 0.000000] Hypervisor detected: Xen PV
[ 0.000000] Setting APIC routing to Xen PV.
[ 0.000000] Booting paravirtualized kernel on Xen
[ 0.000000] Xen version: 4.9.0 (preserve-AD)
[ 0.004000] Xen: using vcpuop timer interface

Johannes Krude (johannes314) wrote :

@jsalibury, the Kernel you provided does successfully boot on Xen.

...
(XEN) Initial low memory virq threshold set at 0x4000 pages.
(XEN) Std. Loglevel: Errors and warnings
(XEN) Guest Loglevel: Nothing (Rate-limited: Errors and warnings)
(XEN) Xen is relinquishing VGA console.
(XEN) *** Serial input -> DOM0 (type 'CTRL-a' three times to switch input to Xen)
(XEN) Freed 460kB init memory
mapping kernel into physical memory
about to get started...
[ 0.000000] Linux version 4.15.0-10-generic (root@kathleen) (gcc version 7.3.0 (Ubuntu 7.3.0-5ubuntu1)) #11~lp1752350 SMP Mon Mar 5 08:26:15 UTC 2018 (Ubuntu 4.15.0-10.11~lp1752350-generic 4.15.3)
[ 0.000000] Command line: placeholder root=/dev/mapper/vg-xen--nfo--dom0 ro rootflags=data=journal console=hvc0 console=tty0 kgdboc=hvc0 early_printk=xen ignore_loglevel
...

Alejandro Mery (amery) wrote :

@jsalibury, your kernel fixed my domUs =)

Joseph Salisbury (jsalisbury) wrote :

The commit that fixes this bug is in upstream stable 4.15.5. These updates have been applied to Bionic master-next.

Changed in linux (Ubuntu Bionic):
status: In Progress → Fix Committed
Alejandro Mery (amery) wrote :

@jsalisbury, when do you think it will be safe to `apt-mark unhold` the kernel?

Joseph Salisbury (jsalisbury) wrote :

The 4.15.5 updates are in the Ubuntu 4.15.0-12 kernel, which is scheduled for release on April 2nd, 2018.

Alejandro Mery (amery) wrote :

thanks Joseph

guo xuelian (belindaguo) wrote :

just comment, we are also meet this issue during testing Xen on Ubuntu18.04 Beta1 on all of platform:
1. install Ubuntu 18.04
2. reboot
3. When I try to boot my virtual machine host using a xenial based Xen system (Xen 4.6, linux generic 4.4.0) it crashes immediately.
Expect Result:
on step3 we expect enter into system with Xen successfully.
Actual Result:
On step3, we failed enter into system with Xen.
Note: No matter boot by UEFI or Legacy mode, above issue reproduced.

guo xuelian (belindaguo) wrote :

add grub file

Soluvious (soluvious) on 2018-03-22
Changed in linux (Ubuntu Bionic):
status: Fix Committed → Confirmed
status: Confirmed → Fix Committed
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