Red Hat Bugzilla – Full Text Bug Listing
|Summary:||qemu does not support full kqemu support|
|Product:||[Fedora] Fedora||Reporter:||Raphael Groner <projects.rg>|
|Component:||qemu||Assignee:||Justin M. Forbes <jforbes>|
|Status:||CLOSED WONTFIX||QA Contact:||Fedora Extras Quality Assurance <extras-qa>|
|Version:||14||CC:||amit.shah, bazanluis20, berrange, dougsland, dwmw2, ehabkost, extras-orphan, gcosta, itamar, jaswinder, jforbes, knoel, ondrejj, scottt.tw, virt-maint|
|Fixed In Version:||Doc Type:||Bug Fix|
|Doc Text:||Story Points:||---|
|Last Closed:||2011-11-30 09:45:12 EST||Type:||---|
|oVirt Team:||---||RHEL 7.3 requirements from Atomic Host:|
Description Raphael Groner 2011-05-22 10:26:36 EDT
Description of problem: Enable full support for kqemu. Version-Release number of selected component (if applicable): qemu-0.13.0-1.fc14.x86_64 qemu-launcher-1.7.4-7.fc12.noarch kqemu-1.4.0-0.5.pre1.fc14.noarch kernel-126.96.36.199-91.fc14.x86_64 How reproducible: always Steps to Reproduce: 1. start Qemu Launcher 2. enable Full support for kqemu 3. Actual results: error (see below) Expected results: just works Additional info: /usr/bin/qemu -monitor stdio -boot d -m 512 -cdrom '/home/raphael/Downloads/Fedora/Fusion-Linux-14/Fusion-Linux-14.iso' -net nic,vlan=0 -net user,vlan=0 -localtime -kernel-kqemu & qemu: -kernel-kqemu: invalid option
Comment 1 Daniel Berrange 2011-05-23 06:04:32 EDT
kqemu support was killed by QEMU upstream developers 2 years ago, and as such is not in Fedora any more: commit 4a1418e07bdcfaa3177739e04707ecaec75d89e1 Author: Anthony Liguori <email@example.com> Date: Mon Aug 10 17:07:24 2009 -0500 Unbreak large mem support by removing kqemu kqemu introduces a number of restrictions on the i386 target. The worst is that it prevents large memory from working in the default build. Furthermore, kqemu is fundamentally flawed in a number of ways. It relies on the TSC as a time source which will not be reliable on a multiple processor system in userspace. Since most modern processors are multicore, this severely limits the utility of kqemu. kvm is a viable alternative for people looking to accelerate qemu and has the benefit of being supported by the upstream Linux kernel. If someone can implement work arounds to remove the restrictions introduced by kqemu, I'm happy to avoid and/or revert this patch. N.B. kqemu will still function in the 0.11 series but this patch removes it from the 0.12 series. Fedora won't be patching QEMU to re-introduce this functionality, unless upstream re-introduces it, which is almost certainly never going to happen.
Comment 2 Raphael Groner 2011-05-23 14:38:33 EDT
Reassigning to [orphaned] qemu-launcher due to it provides an option for "full" support of kqemu.
Comment 3 Raphael Groner 2011-11-30 09:45:12 EST
kqemu has been replaced by KVM.