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artagesw
PostPosted: Wed Feb 29, 2012 4:09 pm 
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Joined: Wed Jul 27, 2011 8:34 pm
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Website: http://eschercms.org
Hi,

I'm booting the CentOS 6 kernel using pv-grub. Works great. However, when I clone any Linode set up in this manner, the clone fails to boot. In the terminal I get:

Map 2048 (a93210, ...) at 0x42162000 failed: -22.
Do_exit called!

Shouldn't this just work? Or is the cloning process not compatible with pb-grub? If anyone can shed some light on this I would appreciate it.

Thanks.

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artagesw
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PostPosted: Wed Feb 29, 2012 8:15 pm 
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Website: http://eschercms.org
Anybody? Really banging my head against the wall. Straight clone of another Linode that boots perfectly, and it refuses to boot. Will boot if I switch to Linode's kernel.

If the filesystem is a perfect copy, what could possibly be the problem? (I shut down the source Linode for the duration of the copy operation to ensure consistency.)

BTW, this has me worried that a resize operation might have the same problem. I think a resize is essentially the same as a clone since the linode gets moved to another server...

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artagesw
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PostPosted: Wed Feb 29, 2012 10:00 pm 
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Website: http://eschercms.org
On a hunch, I tried resizing the clone down a size to the same size as the original source Linode. (I had cloned the source to a larger linode).

Guess what? It boots.

The **only difference** is the Linode's size.

Does this make any sense? I'm no expert in the Linux boot process. But could there be a persistent record of the RAM size (stored somewhere on disk) that is throwing off the boot process when it is not what was expected?

Please throw in your 2 cents!

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artagesw
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PostPosted: Sun Mar 04, 2012 4:49 pm 
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Website: http://eschercms.org
I have found through trial and error that lowering the memory limit in the configuration profile to a value <= 1017 MB allows the instance to boot fine under pv-grub. Any value > 1017Mb causes it to hang during boot.

Anyone out there successfully booting a larger linode (1024MB and up) via pv-grub?

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vchepkov
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PostPosted: Sun Mar 04, 2012 5:20 pm 
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As you already saw in a different thread - I keep kernel-2.6.32-71.29.1.el6.i686 (Centos 6.0) on my VM - nothing above it boots on Linode 1024.
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artagesw
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PostPosted: Sun Mar 04, 2012 5:51 pm 
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Website: http://eschercms.org
Hmm, I could not even get the 6.0 kernel to boot without lowering the memory limit.

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