[Bug 1837651] Re: -netdev socket uses 100% cpu on Windows host

[Thomas Huth]

The QEMU project is currently considering to move its bug tracking to another 
system. For this we need to know which bugs are still valid and which could be 
closed already. Thus we are setting older bugs to "Incomplete" now.
If you still think this bug report here is valid, then please switch the state 
back to "New" within the next 60 days, otherwise this report will be marked as 
"Expired". Or mark it as "Fix Released" if the problem has been solved with a 
newer version of QEMU already. Thank you and sorry for the inconvenience.

** Changed in: qemu
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1837651

Title:
  -netdev socket uses 100% cpu on Windows host

Status in QEMU:
  Incomplete

Bug description:
  On Windows hosts, any `-netdev socket` option (tcp listen, tcp
  connect, udp passing a fd) causes qemu to use 100% cpu. The guest
  still runs, but only sluggishly.

  A simple testcase is:

  > qemu-system-i386.exe -netdev socket,listen=:8000,id=n

  And, in another command prompt:

  > echo foo | nc.exe localhost 8000

  Where nc.exe is netcat.

  Tested on qemu 3.1 (from https://qemu.weilnetz.de/w64/) and 4.0 (self
  compiled).

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