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[Qemu-devel] [Bug 1530278] [NEW] vhost-user: can not detach chardev whic


From: Michael liu
Subject: [Qemu-devel] [Bug 1530278] [NEW] vhost-user: can not detach chardev which is used by vhost-user backend
Date: Thu, 31 Dec 2015 07:26:36 -0000

Public bug reported:

I launch a VM which use vhost-user netdevice as follows.When detach the 
netdevice in qemu monitor, the chardevice which used by the netdevice also 
should be deatched.The netdevice can be detached sucessfully.But the chardevice 
 failed when it was being detaching.   
Full command line :
qemu-system-x86_64 \
-cpu host -boot c -hda /home/lining/ubuntu_12_04.img -snapshot -m 2048 -smp 2 \
--enable-kvm -name "client1" -vnc :1 \
-object memory-backend-file,id=mem,size=2048M,mem-path=/dev/hugepages,share=on 
-numa node,memdev=mem \
-chardev socket,id=chr1,path=/opt/network/ovdk/bin/vhost-user \
-netdev vhost-user,id=net12,chardev=chr1,ifname=port80, vhostforce \
-device virtio-net-pci,netdev=net12,mac=00:00:00:00:00:01,\
csum=off,gso=off,guest_tso4=off,guest_tso6=off,guest_ecn=off,guest_ufo=off,any_layout=off

** Affects: qemu
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1530278

Title:
  vhost-user: can not detach chardev which is used by vhost-user backend

Status in QEMU:
  New

Bug description:
  I launch a VM which use vhost-user netdevice as follows.When detach the 
netdevice in qemu monitor, the chardevice which used by the netdevice also 
should be deatched.The netdevice can be detached sucessfully.But the chardevice 
 failed when it was being detaching.   
  Full command line :
  qemu-system-x86_64 \
  -cpu host -boot c -hda /home/lining/ubuntu_12_04.img -snapshot -m 2048 -smp 2 
\
  --enable-kvm -name "client1" -vnc :1 \
  -object 
memory-backend-file,id=mem,size=2048M,mem-path=/dev/hugepages,share=on -numa 
node,memdev=mem \
  -chardev socket,id=chr1,path=/opt/network/ovdk/bin/vhost-user \
  -netdev vhost-user,id=net12,chardev=chr1,ifname=port80, vhostforce \
  -device virtio-net-pci,netdev=net12,mac=00:00:00:00:00:01,\
  
csum=off,gso=off,guest_tso4=off,guest_tso6=off,guest_ecn=off,guest_ufo=off,any_layout=off

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