"Could not find working O_DIRECT alignment. Try cache.direct=off"

30 Apr 2015


      virDomainCreateXML() is returning "Could not find working O_DIRECT 
alignment. Try cache.direct=off".
This image was working some days ago with a previous version.
Did the image get corrupted or could this be related to a recent change 
in oVirt?

--- Logs ---

Thread-694::INFO::2015-04-30 03:32:49,512::vm::1765::vm.Vm::(_run) 
vmId=`bc99ded7-edc9-4bc5-bca5-a61a286757d2`::<?xml version="1.0" 
encoding="utf-8"?>
<domain type="kvm">
         <name>Test 31</name>
<uuid>bc99ded7-edc9-4bc5-bca5-a61a286757d2</uuid>
         <memory>12582912</memory>
         <currentMemory>12582912</currentMemory>
         <vcpu current="4">16</vcpu>
         <devices>
                 <channel type="unix">
                         <target name="com.redhat.rhevm.vdsm" 
type="virtio"/>
                         <source mode="bind" 
path="/var/lib/libvirt/qemu/channels/bc99ded7-edc9-4bc5-bca5-a61a286757d2.com.redhat.rhevm.vdsm"/>
                 </channel>
                 <channel type="unix">
                         <target name="org.qemu.guest_agent.0" 
type="virtio"/>
                         <source mode="bind" 
path="/var/lib/libvirt/qemu/channels/bc99ded7-edc9-4bc5-bca5-a61a286757d2.org.qemu.guest_agent.0"/>
                 </channel>
                 <input bus="ps2" type="mouse"/>
                 <sound model="ich6"/>
                 <memballoon model="virtio">
                         <address bus="0x00" domain="0x0000" 
function="0x0" slot="0x06" type="pci"/>
                 </memballoon>
                 <controller index="0" ports="16" type="virtio-serial">
                         <address bus="0x00" domain="0x0000" 
function="0x0" slot="0x04" type="pci"/>
                 </controller>
                 <video>
                         <address bus="0x00" domain="0x0000" 
function="0x0" slot="0x02" type="pci"/>
                         <model heads="1" type="cirrus" vram="32768"/>
                 </video>
                 <graphics autoport="yes" listen="0" passwd="*****" 
passwdValidTo="1970-01-01T00:00:01" port="-1" type="vnc"/>
                 <interface type="bridge">
                         <address bus="0x00" domain="0x0000" 
function="0x0" slot="0x03" type="pci"/>
                         <mac address="00:1a:4a:16:01:51"/>
                         <model type="virtio"/>
                         <source bridge=";vdsmdummy;"/>
                         <filterref filter="vdsm-no-mac-spoofing"/>
                         <link state="up"/>
                 </interface>
                 <disk device="cdrom" snapshot="no" type="file">
                         <address bus="1" controller="0" target="0" 
type="drive" unit="0"/>
                         <source file="" startupPolicy="optional"/>
                         <target bus="ide" dev="hdc"/>
                         <readonly/>
                         <serial/>
                 </disk>
                 <disk device="disk" snapshot="no" type="file">
                         <address bus="0x00" domain="0x0000" 
function="0x0" slot="0x05" type="pci"/>
                         <source 
file="/rhev/data-center/00000001-0001-0001-0001-00000000007e/3233144b-7be1-445f-9ea6-6aebbacbb93f/images/5a7db80d-f037-4dcb-8059-6706a2b62b19/db63659c-c9a9-4f4f-887f-3443a008a27e"/>
                         <target bus="virtio" dev="vda"/>
<serial>5a7db80d-f037-4dcb-8059-6706a2b62b19</serial>
                         <boot order="1"/>
                         <driver cache="none" error_policy="stop" 
io="threads" name="qemu" type="raw"/>
                 </disk>
         </devices>
         <os>
                 <type arch="x86_64" machine="rhel6.5.0">hvm</type>
                 <smbios mode="sysinfo"/>
         </os>
         <sysinfo type="smbios">
                 <system>
                         <entry name="manufacturer">oVirt</entry>
                         <entry name="product">oVirt Node</entry>
                         <entry 
name="version">7-1.1503.el7.centos.2.8</entry>
                         <entry 
name="serial">4C4C4544-0042-4B10-8058-B2C04F5A5A31</entry>
                         <entry 
name="uuid">bc99ded7-edc9-4bc5-bca5-a61a286757d2</entry>
                 </system>
         </sysinfo>
         <clock adjustment="3600" offset="variable">
                 <timer name="rtc" tickpolicy="catchup"/>
                 <timer name="pit" tickpolicy="delay"/>
                 <timer name="hpet" present="no"/>
         </clock>
         <features>
                 <acpi/>
         </features>
         <cpu match="exact">
                 <model>SandyBridge</model>
                 <topology cores="1" sockets="16" threads="1"/>
         </cpu>
</domain>

Thread-694::ERROR::2015-04-30 
03:32:49,978::vm::741::vm.Vm::(_startUnderlyingVm) 
vmId=`bc99ded7-edc9-4bc5-bca5-a61a286757d2`::The vm start process failed
Traceback (most recent call last):
   File "/usr/share/vdsm/virt/vm.py", line 689, in _startUnderlyingVm
     self._run()
   File "/usr/share/vdsm/virt/vm.py", line 1800, in _run
     self._connection.createXML(domxml, flags),
   File "/usr/lib/python2.7/site-packages/vdsm/libvirtconnection.py", 
line 126, in wrapper
     ret = f(*args, **kwargs)
   File "/usr/lib64/python2.7/site-packages/libvirt.py", line 3427, in 
createXML
     if ret is None:raise libvirtError('virDomainCreateXML() failed', 
conn=self)
libvirtError: internal error: process exited while connecting to 
monitor: 2015-04-30T06:32:49.783554Z qemu-kvm: -drive 
file=/rhev/data-center/00000001-0001-0001-0001-00000000007e/3233144b-7be1-445f-9ea6-6aebbacbb93f/images/5a7db80d-f037-4dcb-8059-6706a2b62b19/db63659c-c9a9-4f4f-887f-3443a008a27e,if=none,id=drive-virtio-disk0,format=raw,serial=5a7db80d-f037-4dcb-8059-6706a2b62b19,cache=none,werror=stop,rerror=stop,aio=threads: 
could not open disk image 
/rhev/data-center/00000001-0001-0001-0001-00000000007e/3233144b-7be1-445f-9ea6-6aebbacbb93f/images/5a7db80d-f037-4dcb-8059-6706a2b62b19/db63659c-c9a9-4f4f-887f-3443a008a27e: 
Could not find working O_DIRECT alignment. Try cache.direct=off.

---

Related BZ : https://bugzilla.redhat.com/show_bug.cgi?id=1184363

Christopher Pereira

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