Bug 903916

Summary: ahci don't support hotplug
Product: Red Hat Enterprise Linux 7 Reporter: Suqin Huang <shuang>
Component: qemu-kvmAssignee: Kevin Wolf <kwolf>
Status: CLOSED NOTABUG QA Contact: Virtualization Bugs <virt-bugs>
Severity: medium Docs Contact:
Priority: medium    
Version: 7.0CC: acathrow, hhuang, juzhang, pbonzini, sluo, virt-maint
Target Milestone: rc   
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2013-03-15 10:45:34 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Suqin Huang 2013-01-25 03:45:57 UTC 
Description of problem:
"Bus 'ahci.0' does not support hotplugging" error while hotplug a disk to AHCI controller

Version-Release number of selected component (if applicable):
qemu-kvm-1.3.0-3.el7.x86_64
seabios-1.7.2-0.2.gita810e4e7.el7.x86_64

How reproducible:
100%

Steps to Reproduce:
1. boot guest (with ahci controller)
/usr/libexec/qemu-kvm -nodefaults \
-drive file='/home/images/RHEL-Server-6.4-64.qcow2',if=none,id=drive-ide0-0-0,media=disk,cache=none,format=qcow2,aio=native \
-device ide-drive,bus=ide.0,unit=0,drive=drive-ide0-0-0,id=ide0-0-0 \
-device virtio-net-pci,netdev=idUMvixC,mac=9a:87:88:89:8a:8b,bus=pci.0,addr=0x3,id='idMztaHV' -netdev tap,id=idUMvixC,vhost=on,script=/home/autotest-devel/client/virt/scripts/qemu-ifup-switch -m 2048 -smp 2,cores=1,threads=1,sockets=2 -cpu 'Opteron_G3' -vnc :0 -vga cirrus -rtc base=utc,clock=host,driftfix=slew  \
-boot order=cdn,once=c,menu=off   -no-kvm-pit-reinjection -enable-kvm -monitor stdio \
-device ahci,bus=pci.0,id=ahci

2. hotadd drive and device
(qemu) drive_add 0 file=/root/ide2.qcow2,cache=none,if=none,id=disk2,format=qcow2

(qemu) device_add ide-hd,bus=ahci.0,id=ahci-disk,drive=disk2

3.
  
Actual results:
Bus 'ahci.0' does not support hotplugging

Expected results:


Additional info:
Comment 2 Paolo Bonzini 2013-03-15 10:45:34 UTC 
The IDE bus does not support hotplug indeed.  AHCI is just a particular implementation of IDE.

Closing, but since this is not mst's territory I'm also changing the assignee to simplify future discussion.