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

[Launchpad Bug Tracker]

[Expired for QEMU because there has been no activity for 60 days.]

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

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

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

Status in QEMU:
  Expired

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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