[Bug 1465567] Re: Kernel panic - not syncing: Too many boot init vars at `nomdmonddf'
Iain Lane
iain at orangesquash.org.uk
Tue Jun 16 10:22:44 UTC 2015
** Description changed:
- Every time grub-pc is configured, "nomdmonddf nomdmonisw" is added to
- GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub. Eventually this
- overflows a limit in the kernel which causes panics and failed boots.
+ [ Description ]
+
+ Every time grub-pc is configured when mdadm is installed, "nomdmonddf
+ nomdmonisw" is added to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub.
+ Eventually this overflows a limit in the kernel which causes panics and
+ failed boots.
Let's only add this the once.
+
+ I had this in my cmdline
+
+ linux /boot/vmlinuz-3.19.0-20-generic root=UUID=980689ca-e7d9-4a99-8230-33b8b6e917cd ro nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw
+ nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf
+ nomdmonisw nomdmonddf nomdmonisw systemd.debug-shell nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw
+
+ [ Fix ]
+
+ Only add the parameters if they aren't already there.
+
+ [ QA ]
+
+ 1. Look at GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub.
+ 2. apt-get install mdadm
+ 3. apt-get install --reinstall grub-pc
+
+ Repeat 3 a few times.
+
+ Before the SRU, you should see "nomdmonddf nomdmonisw" several times and
+ after it just once.
+
+ [ Regression potential ]
+
+ The script could have a syntax error. It could not work as intended. It
+ might cause conffile prompts.
+
+ Check upgrades and new installs in as many scenarios as we can.
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https://bugs.launchpad.net/bugs/1465567
Title:
Kernel panic - not syncing: Too many boot init vars at `nomdmonddf'
Status in mdadm package in Ubuntu:
Fix Committed
Status in mdadm source package in Trusty:
In Progress
Status in mdadm source package in Vivid:
In Progress
Bug description:
[ Description ]
Every time grub-pc is configured when mdadm is installed, "nomdmonddf
nomdmonisw" is added to GRUB_CMDLINE_LINUX_DEFAULT in
/etc/default/grub. Eventually this overflows a limit in the kernel
which causes panics and failed boots.
Let's only add this the once.
I had this in my cmdline
linux /boot/vmlinuz-3.19.0-20-generic root=UUID=980689ca-e7d9-4a99-8230-33b8b6e917cd ro nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw
nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf
nomdmonisw nomdmonddf nomdmonisw systemd.debug-shell nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw nomdmonddf nomdmonisw
[ Fix ]
Only add the parameters if they aren't already there.
[ QA ]
1. Look at GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub.
2. apt-get install mdadm
3. apt-get install --reinstall grub-pc
Repeat 3 a few times.
Before the SRU, you should see "nomdmonddf nomdmonisw" several times
and after it just once.
[ Regression potential ]
The script could have a syntax error. It could not work as intended.
It might cause conffile prompts.
Check upgrades and new installs in as many scenarios as we can.
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