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Re: [Qemu-devel] Starting kvm/qemu guest crash kernel linux-next 0221 tr


From: Xiong Zhou
Subject: Re: [Qemu-devel] Starting kvm/qemu guest crash kernel linux-next 0221 tree
Date: Wed, 22 Feb 2017 21:55:49 +0800
User-agent: NeoMutt/20170206-195-7adf12 (1.7.2)

On Wed, Feb 22, 2017 at 09:28:21AM +0100, Paolo Bonzini wrote:
> 
> 
> On 22/02/2017 02:52, Xiong Zhou wrote:
> > Hi,
> > 
> > Starting a guest begin to crash kernel on 0221 -next tree.
> > 
> > It's fine on 0220 tree.

I reproduced only once. Now it's hard to reproduce.
> 
> Can you try commits a26d553400b30b6e0389f5c723c0fc6f7ea473da (0221) and

With above commit reverted by git revert -m 1, no panic so far.
But it's hard to reproduce.


> b95234c840045b7c72380fd14c59416af28fcb02 (0220)?
> 
> What is the guest and the QEMU command line?

It's a RHEL-7.3 guest on a RHEL-7.3+ host

cmdline:
    /usr/libexec/qemu-kvm -name 73h -S -machine 
pc-i440fx-rhel7.0.0,accel=kvm,usb=off,dump-guest-core=off -cpu 
Haswell,-hle,-rtm -m 8000 -realtime mlock=off -smp 
8,sockets=8,cores=1,threads=1 -uuid aab09e0f-d48a-4223-9b81-35d4718d59fc 
-no-user-config -nodefaults -chardev 
socket,id=charmonitor,path=/var/lib/libvirt/qemu/domain-2-73h/monitor.sock,server,nowait
 -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc,driftfix=slew 
-global kvm-pit.lost_tick_policy=delay -no-hpet -no-shutdown -global 
PIIX4_PM.disable_s3=1 -global PIIX4_PM.disable_s4=1 -boot strict=on -device 
ich9-usb-ehci1,id=usb,bus=pci.0,addr=0x6.0x7 -device 
ich9-usb-uhci1,masterbus=usb.0,firstport=0,bus=pci.0,multifunction=on,addr=0x6 
-device ich9-usb-uhci2,masterbus=usb.0,firstport=2,bus=pci.0,addr=0x6.0x1 
-device ich9-usb-uhci3,masterbus=usb.0,firstport=4,bus=pci.0,addr=0x6.0x2 
-device virtio-serial-pci,id=virtio-serial0,bus=pci.0,addr=0x5 -drive 
file=/var/lib/libvirt/images/rhel73.qcow2,format=qcow2,if=none,id=drive-ide0-0-0
 -device ide-hd,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0,bootindex=1 
-drive 
file=/var/lib/libvirt/images/73h.qcow2,format=qcow2,if=none,id=drive-ide0-0-1 
-device ide-hd,bus=ide.0,unit=1,drive=drive-ide0-0-1,id=ide0-0-1 -drive 
file=/root/RHEL-7.2-20151030.0-Server-x86_64-dvd1.iso,format=raw,if=none,id=drive-ide0-1-0,readonly=on
 -device ide-cd,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0,bootindex=2 
-netdev tap,fd=25,id=hostnet0 -device 
rtl8139,netdev=hostnet0,id=net0,mac=52:54:00:83:12:7b,bus=pci.0,addr=0x3 
-chardev pty,id=charserial0 -device isa-serial,chardev=charserial0,id=serial0 
-chardev spicevmc,id=charchannel0,name=vdagent -device 
virtserialport,bus=virtio-serial0.0,nr=1,chardev=charchannel0,id=channel0,name=com.redhat.spice.0
 -spice 
port=5900,addr=127.0.0.1,disable-ticketing,image-compression=off,seamless-migration=on
 -vga qxl -global qxl-vga.ram_size=67108864 -global qxl-vga.vram_size=67108864 
-global qxl-vga.vgamem_mb=16 -device intel-hda,id=sound0,bus=pci.0,addr=0x4 
-device hda-duplex,id=sound0-codec0,bus=sound0.0,cad=0 -chardev 
spicevmc,id=charredir0,name=usbredir -device 
usb-redir,chardev=charredir0,id=redir0,bus=usb.0,port=1 -chardev 
spicevmc,id=charredir1,name=usbredir -device 
usb-redir,chardev=charredir1,id=redir1,bus=usb.0,port=2 -device 
virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x7 -msg timestamp=on

Thanks,
Xiong

> 
> Paolo



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