Bug 588877 - Rebooting a kernel with kvmclock enabled, into a kernel with kvmclock disabled, causes random crashes
Summary: Rebooting a kernel with kvmclock enabled, into a kernel with kvmclock disable...
Alias: None
Product: Fedora
Classification: Fedora
Component: qemu
Version: 12
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Justin M. Forbes
QA Contact: Fedora Extras Quality Assurance
Depends On: 588874 588878 588884
TreeView+ depends on / blocked
Reported: 2010-05-04 18:39 UTC by Glauber Costa
Modified: 2013-01-09 11:33 UTC (History)
12 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of: 588874
Last Closed: 2010-12-03 15:05:59 UTC
Type: ---

Attachments (Terms of Use)

Description Glauber Costa 2010-05-04 18:39:14 UTC
+++ This bug was initially created as a clone of Bug #588874 +++

Description of problem:

Right now, if we boot into a kernel with kvmclock eanbled, and then reboot into a kernel with kvmclock disabled (rebooting with no-kvmclock kernel option is enough), we'll see the second kernel crash with random memory corruption.

This indicates that kvmclock is still writing to the old memory location,
which will now contain something else entirely.

Version-Release number of selected component (if applicable):
all, including upstream

How reproducible:


Steps to Reproduce:
1. boot a kernel with kvmclock enabled
2. reboot
3. pause grub in the OS selection screen, edit parameters, and remove kvmclock
Actual results:


Expected results:


Comment 1 Bug Zapper 2010-11-03 15:39:54 UTC
This message is a reminder that Fedora 12 is nearing its end of life.
Approximately 30 (thirty) days from now Fedora will stop maintaining
and issuing updates for Fedora 12.  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bug reports from releases that are no longer maintained.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 '12'.

Package Maintainer: If you wish for this bug to remain open because you
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Comment 2 Bug Zapper 2010-12-03 15:05:59 UTC
Fedora 12 changed to end-of-life (EOL) status on 2010-12-02. Fedora 12 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no longer maintained, which means that it will not receive any further 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.

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