Bugs item #2443886, was opened at 2008-12-18 04:04
Message generated for change (Comment added) made by avik
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https://sourceforge.net/tracker/?func=detail&atid=893831&aid=2443886&group_id=180599

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>Category: kernel
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Jiajun Xu (jiajun)
>Assigned to: Marcelo Tosatti (mtosatti)
Summary: SMP PAE Vista guest crash with inject_page_fault

Initial Comment:
Kernel Commit:9ff66047142bd6a22825ada67eeaebbdf60c0280
Userspace Commit:8eae225cf8cd82316fcc78569aeb1adbbc077cb8
Host Kernel Version: 2.6.28-rc6

>From above commit, we can not boot up SMP PAE Vista guest, which always crash 
>and reboot when it is booting.

On host console, it shows "inject_page_fault" with address 0x842399d0.
##########
kvm: inject_page_fault: double fault 0x842399d0
kvm: inject_page_fault: double fault 0x842399d0
##########

The bug does not occur with UP PAE Vista and UP/SMP 32e Vista guest.

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>Comment By: Avi Kivity (avik)
Date: 2008-12-21 12:58

Message:
bisected to 

commit 6364a3918cb5c28376849e7fca3e09bd66b859f3
Author: Marcelo Tosatti <[email protected]>
Date:   Mon Dec 1 22:32:04 2008 -0200

    KVM: MMU: skip global pgtables on sync due to cr3 switch
    
    Skip syncing global pages on cr3 switch (but not on cr4/cr0). This is
    important for Linux 32-bit guests with PAE, where the kmap page is
    marked as global.
    
    Signed-off-by: Marcelo Tosatti <[email protected]>
    Signed-off-by: Avi Kivity <[email protected]>


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