Bug 436249

Summary: (XEN) Domain 0 crashed: rebooting machine in 5 seconds.
Product: [Fedora] Fedora Reporter: John Summerfield <debian>
Component: kernel-xenAssignee: Xen Maintainance List <xen-maint>
Status: CLOSED WONTFIX QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: low    
Version: 9Keywords: Reopened
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2009-07-14 18:26:27 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description John Summerfield 2008-03-06 03:26:54 UTC
Description of problem:
When the kernel panics, xen reboots two quickly for users to see what's happened.

Version-Release number of selected component (if applicable):


How reproducible:
Always

Steps to Reproduce:
1.Boot with a duff initrd:-)
2.
3.
  
Actual results:

boot loop

Expected results:
By default, to stop until the users presses ^-ALT-DEL.

Additional info:
switchroot: mount failed: No such file or directory
Booting has failed.
Kernel panic - not syncing: Attempted to kill init!
(XEN) Debugging connection not set up.
(XEN) Domain 0 crashed: rebooting machine in 5 seconds.

See also 436099    	 
I wasn't able to find the cause of this without a serial cable to connect two
serial ports together.

Comment 1 Daniel Berrangé 2008-03-06 04:38:32 UTC
To disable the automatic reboot, just add  'noreboot' to the hypervisor boot
command line args in grub.

Comment 2 John Summerfield 2008-03-10 09:22:38 UTC
Five seconds is way too fast. There needs to be enough time for a user to
realise something is wrong and read the messages. The current delay is barely
enough time to photograph the screen (I had to do that recently for another bug).

The default operation should be the same as Linux kernels, much as I dislike
hard lockups.

Best default for both, I think, would be to await control-alt-del.

btw Where are the xen options documented? Certainly not in the package.


Comment 3 Daniel Berrangé 2008-03-20 00:28:02 UTC
THis needs to be against kernel-xen, since that's where the hypervisor lives.
I'm still not inclined to chance the default Xen hypervisor reboot behaviour,
but will leave it up kernel guys to decide.


Comment 4 John Summerfield 2008-03-31 03:35:18 UTC
I wonder whether this should be reassinged to alanc, the original problem is a
manifestation of 436099 on the same hardware, and which it is (properly)
assigned to him.

Comment 5 John Summerfield 2008-04-27 09:48:59 UTC
436099 is closed, the original problem (probably) needs the same fixed. Possibly
to should also have been marked f9-kernel-blocker, as the other was.



Comment 6 Bug Zapper 2008-05-14 05:48:40 UTC
Changing version to '9' as part of upcoming Fedora 9 GA.
More information and reason for this action is here:
http://fedoraproject.org/wiki/BugZappers/HouseKeeping

Comment 7 Bug Zapper 2009-06-09 23:41:18 UTC
This message is a reminder that Fedora 9 is nearing its end of life.
Approximately 30 (thirty) days from now Fedora will stop maintaining
and issuing updates for Fedora 9.  It is Fedora's policy to close all
bug reports from releases that are no longer maintained.  At that time
this bug will be closed as WONTFIX if it remains open with a Fedora 
'version' of '9'.

Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained version, simply change the 'version' 
to a later Fedora version prior to Fedora 9's end of life.

Bug Reporter: Thank you for reporting this issue and we are sorry that 
we may not be able to fix it before Fedora 9 is end of life.  If you 
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against a later version of Fedora please change the 'version' of this 
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Although we aim to fix as many bugs as possible during every release's 
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The process we are following is described here: 
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Comment 8 Bug Zapper 2009-07-14 18:26:27 UTC
Fedora 9 changed to end-of-life (EOL) status on 2009-07-10. Fedora 9 is 
no longer maintained, which means that it will not receive any further 
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of 
Fedora please feel free to reopen this bug against that version.

Thank you for reporting this bug and we are sorry it could not be fixed.