[Bug 1893691] Re: Chardev logfile is not written (regression between 5.0 and 5.1)

[Dr. David Alan Gilbert]

(Subscribing Dan Berrange as char person).

Is there any chance you could bisect to see the exact change?

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https://bugs.launchpad.net/bugs/1893691

Title:
  Chardev logfile is not written (regression between 5.0 and 5.1)

Status in QEMU:
  New

Bug description:
  After update from version 5.0 to 5.1, logfile stopped being populated
  with console output. The file is being created, but remains empty.

  Relevant command line options:

  -mon chardev=char0
  -serial chardev:char0
  -chardev 
socket,host=127.0.0.10,port=2323,server,nowait,telnet,mux=on,id=char0,logfile=/home/jurkiew/.machiner/runs/2020-08-31T21:46:55-0/internal/log

  
  Full command line:

  qemu-system-x86_64
  -nodefaults
  -no-user-config
  -snapshot
  -enable-kvm
  -cpu
  host
  -nographic
  -echr
  17
  -mon
  chardev=char0
  -serial
  chardev:char0
  -rtc
  clock=vm
  -object
  rng-random,filename=/dev/urandom,id=rng0
  -device
  virtio-rng-pci,rng=rng0,max-bytes=512,period=1000
  -name
  2020-08-31T21:46:55-0,debug-threads=on
  -smp
  sockets=1,cores=9,threads=2
  -m
  251G
  -overcommit
  cpu-pm=on
  -pidfile
  /home/jurkiew/.machiner/runs/2020-08-31T21:46:55-0/internal/pid
  -net
  nic,model=virtio
  -net
  
user,hostfwd=tcp:127.0.0.10:2222-:22,hostfwd=tcp:127.0.0.10:8000-:8000,hostfwd=tcp:127.0.0.10:9000-:9000
  -fsdev
  
local,id=machiner_internal_dir,security_model=none,path=/home/jurkiew/.machiner/runs/2020-08-31T21:46:55-0/internal
  -device
  virtio-9p-pci,fsdev=machiner_internal_dir,mount_tag=machiner_internal_dir
  -fsdev
  local,id=machiner_lower_dir,security_model=none,readonly,path=.
  -device
  virtio-9p-pci,fsdev=machiner_lower_dir,mount_tag=machiner_lower_dir
  -fsdev
  
local,id=machiner_upper_dir,security_model=mapped-xattr,fmode=0777,dmode=0777,path=/home/jurkiew/.machiner/runs/2020-08-31T21:46:55-0
  -device
  virtio-9p-pci,fsdev=machiner_upper_dir,mount_tag=machiner_upper_dir
  -device
  virtio-scsi
  -drive
  
if=none,file=/home/jurkiew/.machiner/images/famtar/image.qcow2,discard=on,id=famtar
  -device
  scsi-hd,drive=famtar
  -chardev
  
socket,host=127.0.0.10,port=2323,server,nowait,telnet,mux=on,id=char0,logfile=/home/jurkiew/.machiner/runs/2020-08-31T21:46:55-0/internal/log

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