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[Bug 1481272] Re: main-loop: WARNING: I/O thread spun for 1000 iterations

 

Nice, thanks for the update.
I checked a few recent logs and agree that the message is gone since 2.9

Some might still encounter slow guests (for other reasons) and trigger
the message, but the most common TCG emulation case is solved by this
since Artful and later.

I think we don't want to backport all the prereqs (I/O thread locking
changes) to Xenial that allow to add this change here.

** Also affects: qemu (Ubuntu)
   Importance: Undecided
       Status: New

** Also affects: qemu (Ubuntu Bionic)
   Importance: Undecided
       Status: New

** Also affects: qemu (Ubuntu Xenial)
   Importance: Undecided
       Status: New

** Also affects: qemu (Ubuntu Artful)
   Importance: Undecided
       Status: New

** Changed in: qemu (Ubuntu Xenial)
       Status: New => Won't Fix

** Changed in: qemu (Ubuntu Artful)
       Status: New => Fix Released

** Changed in: qemu (Ubuntu Bionic)
       Status: New => Fix Released

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https://bugs.launchpad.net/bugs/1481272

Title:
  main-loop: WARNING: I/O thread spun for 1000 iterations

Status in QEMU:
  New
Status in qemu package in Ubuntu:
  Fix Released
Status in qemu source package in Xenial:
  Won't Fix
Status in qemu source package in Artful:
  Fix Released
Status in qemu source package in Bionic:
  Fix Released

Bug description:
  I compile the latest qemu to launch a VM but the monitor output the
  "main-loop: WARNING: I/O thread spun for 1000 iterations".

  # /usr/local/bin/qemu-system-x86_64 -name rhel6 -S -no-kvm -m 1024M -realtime mlock=off -smp 1,sockets=1,cores=1,threads=1 -uuid c9dd2a5c-40f2-fd3d-3c54-9cd84f8b9174 -rtc base=utc  -drive file=/home/samba-share/ubuntu.img,if=none,id=drive-virtio-disk0,format=qcow2,cache=none -device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=disk,serial=425618d4-871f-4021-bc5d-bcd7f1b5ca9c,bootindex=0 -vnc :1 -boot menu=on -monitor stdio
  QEMU 2.3.93 monitor - type 'help' for more information
  (qemu) c
  (qemu) main-loop: WARNING: I/O thread spun for 1000 iterations               <-----------------------

  qemu]# git branch -v
  * master               e95edef Merge remote-tracking branch 'remotes/sstabellini/tags/xen-migration-2.4-tag' into staging

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