Hello Is there any way to verify that cache is enabled? My machine is running with following parameters:
qemu-system-x86_64 -machine accel=kvm:tcg -name instance-00000302 -S -machine pc-i440fx-1.5,accel=kvm,usb=off -cpu Westmere,+rdtscp,+avx,+osxsave,+xsave,+tsc-deadline,+pcid,+pdcm,+xtpr,+tm2,+est,+vmx,+ds_cpl,+monitor,+dtes64,+pclmuldq,+pbe,+tm,+ht,+ss,+acpi,+ds,+vme -m 1024 -realtime mlock=off -smp 1,sockets=1,cores=1,threads=1 -uuid a5a1406b-6899-4f2e-9d86-d52814b7e6ff -smbios type=1,manufacturer=OpenStack Foundation,product=OpenStack Nova,version=2013.1.2,serial=1b059fc0-5bcb-11d9-9bb6-c860005ff2fe,uuid=a5a1406b-6899-4f2e-9d86-d52814b7e6ff -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/instance-00000302.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc,driftfix=slew -no-kvm-pit-reinjection -no-shutdown -device piix3-usb-uhci,id=usb,bus=pci.0,addr=0x1.0x2 -drive file=rbd:cinder_volumes/volume-2dbad334-1dd5-4e26-8c6f-0bd79dd43d98:id=cinder_volumes:key=XXX:auth_supported=cephx\;none,if=none,id=drive-virtio-disk0,format=raw,serial=2dbad334-1dd5-4e26-8c6f-0bd79dd43d98,cache=writeback -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=1 -drive file=rbd:cinder_volumes/volume-5c310c6a-942f-4039-9594-074ee633656a:id=cinder_volumes:key=XXX:auth_supported=cephx\;none,if=none,id=drive-virtio-disk1,format=raw,serial=5c310c6a-942f-4039-9594-074ee633656a,cache=writeback -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk1,id=virtio-disk1 -netdev tap,fd=25,id=hostnet0,vhost=on,vhostfd=26 -device virtio-net-pci,netdev=hostnet0,id=net0,mac=fa:16:3e:e8:34:4c,bus=pci.0,addr=0x3 -chardev file,id=charserial0,path=/var/lib/nova/instances/a5a1406b-6899-4f2e-9d86-d52814b7e6ff/console.log -device isa-serial,chardev=charserial0,id=serial0 -chardev pty,id=charserial1 -device isa-serial,chardev=charserial1,id=serial1 -device usb-tablet,id=input0 -vnc 127.0.0.1:1 -k en-us -device cirrus-vga,id=video0,bus=pci.0,addr=0x2 -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x6 ceph.conf has entry: [client] rbd_cache = true kvm version 1.5.0, ceph 0.64 regards M. Galkiewicz
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