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[Qemu-devel] [Bug 524447] Re: virsh save is very slow
From: |
Jeff Snider |
Subject: |
[Qemu-devel] [Bug 524447] Re: virsh save is very slow |
Date: |
Mon, 20 Feb 2012 04:42:14 -0000 |
Lucid 10.04.4 amd64 host. 2.6.32-38-server. All packages up to date.
Guest:
Win 7 64bit
1Gb RAM (all in use in guest)
2 vproc
VirtIO disk (virtio-win-0.1-22)
VirtIO network
2 IDE cdroms
VNC display
virsh save:
0.12.3+noroms-0ubuntu9.17 503.8 seconds
0.12.3+noroms-0ubuntu9.18 26.4 seconds
Tested virsh start, stop, save, restore, suspend, resume, shutdown,
destroy. All works as expected. Guest functionality unchanged.
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https://bugs.launchpad.net/bugs/524447
Title:
virsh save is very slow
Status in libvirt virtualization API:
Unknown
Status in QEMU:
Fix Released
Status in “libvirt” package in Ubuntu:
Invalid
Status in “qemu-kvm” package in Ubuntu:
Fix Released
Status in “libvirt” source package in Lucid:
Won't Fix
Status in “qemu-kvm” source package in Lucid:
Fix Committed
Status in “libvirt” source package in Maverick:
Won't Fix
Status in “qemu-kvm” source package in Maverick:
Won't Fix
Status in “qemu-kvm” package in Debian:
Fix Released
Bug description:
==================================
SRU Justification:
1. impact: 'qemu save' is slow
2. how addressed: a patch upstream fixes the case when a file does not
announce when it is ready.
3. patch: see the patch in linked bzr trees
4. TEST CASE: see comment #4 for a specific recipe
5. regression potential: this patch only touches the vm save path.
==================================
As reported here: http://www.redhat.com/archives/libvir-
list/2009-December/msg00203.html
"virsh save" is very slow - it writes the image at around 1MB/sec on
my test system.
(I think I saw a bug report for this issue on Fedora's bugzilla, but I
can't find it now...)
Confirmed under Karmic.
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