Re: [ kvm-Bugs-1900829 ] KVM crashes with AMD NPT

[Marcelo Tosatti <marcelo@kvack.org>]

On Sun, Feb 24, 2008 at 04:40:09AM -0800, SourceForge.net wrote:
> Bugs item #1900829, was opened at 2008-02-24 14:40
> Message generated for change (Tracker Item Submitted) made by Item Submitter
> You can respond by visiting: 
> https://sourceforge.net/tracker/?func=detail&atid=893831&aid=1900829&group_id=180599
> 
> Please note that this message will contain a full copy of the comment thread,
> including the initial issue submission, for this request,
> not just the latest update.
> Category: None
> Group: None
> Status: Open
> Resolution: None
> Priority: 5
> Private: No
> Submitted By: Technologov (technologov)
> Assigned to: Nobody/Anonymous (nobody)
> Summary: KVM crashes with AMD NPT
> 
> Initial Comment:
> KVM-61 guest crashes, when NPT=on, and when VM is accessed via VNC.
> 
> It is 100% reproducible.
> 
> Loading kvm-amd module without NPT, works fine.
> like:
> # modprobe kvm-amd npt=0
> 
> Host: AMD Barcelona, F7/x64, KVM-61.
> 
> Guest: Debian 4/x86.
> 
> The Command sent to Qemu/KVM: /usr/local/bin/qemu-system-x86_64 -hda /vm/debian4
> -test32.qcow2 -m 256 -monitor tcp:localhost:4517,server,nowait -cdrom /isos/linu
> x/debian-40r0-i386-DVD-1.iso -boot d -name Debian4 -vnc :10 &
> 
> ======================================================
> 
> *** glibc detected *** /usr/local/bin/qemu-system-x86_64: realloc(): invalid old
>  size: 0x00002aaabbde1010 ***
> ======= Backtrace: =========
> /lib64/libc.so.6[0x3dd0271fbb]
> /lib64/libc.so.6(realloc+0x124)[0x3dd0273d94]
> /usr/local/bin/qemu-system-x86_64[0x471c02]
> /usr/local/bin/qemu-system-x86_64[0x47229b]
> /usr/local/bin/qemu-system-x86_64[0x471583]
> /usr/local/bin/qemu-system-x86_64[0x40de98]
> /usr/local/bin/qemu-system-x86_64[0x4fd81d]
> /usr/local/bin/qemu-system-x86_64[0x4fd859]
> /usr/local/bin/qemu-system-x86_64[0x4fe0a6]
> /usr/local/bin/qemu-system-x86_64[0x410e3d]
> /lib64/libc.so.6(__libc_start_main+0xf4)[0x3dd021daa4]
> /usr/local/bin/qemu-system-x86_64[0x406219]
> ======= Memory map: ========
> 00400000-0057f000 r-xp 00000000 fd:00 1952887                            /usr/lo
> cal/bin/qemu-system-x86_64
> 0077e000-007b2000 rw-p 0017e000 fd:00 1952887                            /usr/lo
> cal/bin/qemu-system-x86_64
> 007b2000-01a85000 rw-p 007b2000 00:00 0
> 01a85000-02a86000 rwxp 01a85000 00:00 0
> 02a86000-02e12000 rw-p 02a86000 00:00 0                                  [heap]

Alexey,

Running the test with MMU_DEBUG defined in arch/x86/kvm/mmu.c can
probably shed some light into the issue.


-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2008.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/