Quoting Fabio Marconi (fabiomarc...@ubuntu.com):
> Hallo Serge
> I've added the cache=none at the kvm testdrive parameters, but seems not
> affecting the settings:
>
> njin@quantic:~$ ps -ef | grep kvm
> root 562 2 0 19:06 ? 00:00:00 [kvm-irqfd-clean]
> njin 3533 3496 0 20:34 ? 00:00:00 /bin/sh -c kvm -uuid
> e75dba4a-1fa8-4ee7-9c67-13c7a0439800 -m 1024 -smp 4 -cdrom
> /home/njin/Ubuntu/quantal-desktop-amd64.iso -drive
> file=/home/njin/.cache/testdrive/img/testdrive-disk-2gXmzk.img,if=virtio,cache=writeback,index=0,boot=on
> -usb -usbdevice tablet -net nic,model=virtio -net user -soundhw es1370 -vga
> cirrus
> njin 3534 3533 99 20:34 ? 00:00:27 kvm -uuid
> e75dba4a-1fa8-4ee7-9c67-13c7a0439800 -m 1024 -smp 4 -cdrom
> /home/njin/Ubuntu/quantal-desktop-amd64.iso -drive
> file=/home/njin/.cache/testdrive/img/testdrive-disk-2gXmzk.img,if=virtio,cache=writeback,index=0,boot=on
> -usb -usbdevice tablet -net nic,model=virtio -net user -soundhw es1370 -vga
> cirrus
> root 3540 2 0 20:34 ? 00:00:00 [kvm-pit/3534]
> njin 3605 3551 0 20:34 pts/1 00:00:00 grep --color=auto kvm
>
> As I'm not an expert in the use of qemu, can you please tell me the command
> to run a live session in qemu passing the cache=none command ?
> Thanks in advance
Hm, it looks like this is hardcoded into testdrive. The file
/usr/share/pyshared/testdrive/virt/kvm.py
has:
cmd = "kvm -m %s -smp %s -cdrom %s -drive
file=%s,if=virtio,cache=writeback,index=0,boot=on %s" % (self.MEM,
self.SMP, self.PATH_TO_ISO, self.DISK_FILE, self.KVM_ARGS)
(roughly line 67). You would want to change that to:
cmd = "kvm -m %s -smp %s -cdrom %s -drive
file=%s,if=virtio,cache=none,index=0,boot=on %s" % (self.MEM, self.SMP,
self.PATH_TO_ISO, self.DISK_FILE, self.KVM_ARGS)
If this works, then we should open a bug against testdrive-common to
make that configurable and perhaps change the default.
(Please let me know if you have trouble making this change)
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https://bugs.launchpad.net/bugs/1039166
Title:
high use of resource
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