Bug 613739

Summary: KVM: PIT: stop vpit before freeing irq_routing (upstream backport)
Product: Red Hat Enterprise Linux 6 Reporter: Marcelo Tosatti <mtosatti>
Component: kernelAssignee: Red Hat Kernel Manager <kernel-mgr>
Status: CLOSED DUPLICATE QA Contact: Red Hat Kernel QE team <kernel-qe>
Severity: medium Docs Contact:
Priority: low    
Version: 6.0   
Target Milestone: rc   
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2010-07-13 19:34:15 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 Marcelo Tosatti 2010-07-12 18:09:38 UTC 
Fix:
    general protection fault: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
    ......
    Call Trace:
     [<ffffffffa0159bd1>] ? kvm_set_irq+0xdd/0x24b [kvm]
     [<ffffffff8106ea8b>] ? trace_hardirqs_off_caller+0x1f/0x10e
     [<ffffffff813ad17f>] ? sub_preempt_count+0xe/0xb6
     [<ffffffff8106d273>] ? put_lock_stats+0xe/0x27
    ...
    RIP  [<ffffffffa0159c72>] kvm_set_irq+0x17e/0x24b [kvm]
    
    This bug is triggered when guest is shutdown, is because we freed
    irq_routing before pit thread stopped

    Signed-off-by: Xiao Guangrong <xiaoguangrong.com>
    Signed-off-by: Marcelo Tosatti <mtosatti>
Comment 2 Marcelo Tosatti 2010-07-13 19:34:15 UTC 

*** This bug has been marked as a duplicate of bug 612648 ***