Working installer kernel / initramfs can of course be obtained from
-updates:
http://archive.ubuntu.com/ubuntu/dists/bionic-
updates/main/installer-i386/current/images/
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** Tags added: cscc
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https://bugs.launchpad.net/bugs/1789118
Title:
Fails to boot under Xen PV: BUG: unable to handle kernel paging
request at edc21fd9
Status in linux
As mentioned in my first comment, this bug also affects the netboot
installer at e.g.
http://gb.archive.ubuntu.com/ubuntu/dists/bionic/main/installer-i386/current/images/
so it is still not possible to boot the installer in 32-bit under Xen.
The main OS kernel has been fixed but not the installer
** Changed in: linux (Ubuntu)
Status: In Progress => Fix Released
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Title:
Fails to boot under Xen PV: BUG: unable to handle
This bug was fixed in the package linux - 4.15.0-38.41
---
linux (4.15.0-38.41) bionic; urgency=medium
* linux: 4.15.0-38.41 -proposed tracker (LP: #1797061)
* Silent data corruption in Linux kernel 4.15 (LP: #1796542)
- block: add a lower-level bio_add_page interface
-
Successful boot with kernel from bionic-proposed.
** Tags removed: verification-needed-bionic
** Tags added: verification-done-bionic
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Successful boot with kernel from bionic-proposed.
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Title:
Fails to boot under Xen PV: BUG: unable to handle kernel paging
request
This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
bionic' to 'verification-done-bionic'. If the problem still exists,
change the tag
** Changed in: linux (Ubuntu Bionic)
Status: In Progress => Fix Committed
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Title:
Fails to boot under Xen PV: BUG: unable to
SRU request submitted:
https://lists.ubuntu.com/archives/kernel-team/2018-September/095572.html
** Description changed:
- After the most recent 18.04 32-bit upgrade of linux-image-generic, it
- now refuses to boot under Xen PV mode:
+ == SRU Justification ==
+ After an upgrade to Bionic, the bug
** Changed in: linux (Ubuntu)
Status: Triaged => In Progress
** Changed in: linux (Ubuntu Bionic)
Status: Triaged => In Progress
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Hi Joseph,
As this problem only affects 32-bit, there would need to be an i686
kernel there. As far as I can see there are only amd64 packages.
I have already tested this patch on the linux source package from 18.04
(comment #9), but I don't have the binary packages around any more.
If you want
I built a test kernel with the patch posted in comment #12. The test kernel
can be downloaded from:
http://kernel.ubuntu.com/~jsalisbury/lp1789118
Can you test this kernel and see if it resolves this bug? If it does,
I'll submit it as an SRU, so we don't have to wait for the patch to come
down
This patch was submitted here: https://lkml.org/lkml/2018/9/11/885
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Title:
Fails to boot under Xen PV: BUG: unable to handle kernel
Was there any discussion at Xen whether or not the patch you tested
would be submitted to mainline?
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Title:
Fails to boot under Xen
Alternatively as the bug is in the EISA code, if the kernel was built
without CONFIG_EISA=y then I think that would avoid it. I haven't hit
this problem on Debian stable or testing where CONFIG_EISA is not set.
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I reported the problem to Xen, and they came up with this patch:
https://lists.xenproject.org/archives/html/xen-
devel/2018-08/msg02775.html
I recompiled linux-image-4.15.0-33-generic with this patch applied and
it now works.
As far as I can see there is no working 32-bit Xen PV kernel package
Thanks for the update, Andy. If you need any specific upstream kernel
versions, they are all prebuilt here:
http://kernel.ubuntu.com/~kernel-ppa/mainline/
Just let me know if you need assistance with a kernel bisect or building
any specific kernels.
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Okay, I went back through the kernel PPAs and in fact the most recent
one that I can get to boot under 32-bit PV mode Xen is 4.13.16. 4.14-rc1
does not boot.
I realised then that it was possible that I had never tested any version
of 32-bit Ubuntu 18.04 under Xen. It is possible that I only ever
Sorry, I requested testing of the 4.15.0-33 kernel, but should have
requested 4.15.0-32.
Yes, it would be great if you could identify the last 4.15 kernel that
booted and the first that did not. Once we know this, we can perform a
bisect to identify the commit that introduced the regression.
32-bit kernel http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.15.18
/linux-image-4.15.18-041518-generic_4.15.18-041518.201804190330_i386.deb
does not boot, in fact it crashes immediately without producing any
console output at all (so doesn't get as far as the currently-packaged
Does the machine boot if you select 4.15.0-33 from the GRUB menu? If
so, can you test the latest 4.15 upstream stable kernel, which can be
downloaded from:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.15.18/
** Changed in: linux (Ubuntu)
Importance: Undecided => High
** Also affects:
I am unable to run apport-collect because the guest does not boot.
** Changed in: linux (Ubuntu)
Status: Incomplete => Confirmed
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** Package changed: linux-meta (Ubuntu) => linux (Ubuntu)
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Title:
Fails to boot under Xen PV: BUG: unable to handle kernel paging
Additionally, this means that the netboot installer at e.g.
http://gb.archive.ubuntu.com/ubuntu/dists/bionic/main/installer-i386/current/images/netboot/xen/vmlinuz
also does not boot under Xen PV. Again, the 64-bit equivalent does still
work.
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