On 06/05/2014 10:13 AM, Tom Horsley wrote: > Anyone know why qemu wouldn't want to run a virtual > machine installing to a qcow2 image file on a tmpfs > filesystem? > > They are doing a lot of test installs in virtual machines > at work, and I suggested creating a storage pool > in tmpfs (the host machine has vast amounts of memory) > as something that might make the install go faster, > but it seems to refuse to even attempt to use the > tmpfs image.
What caching mode are you requesting? tmpfs can't (yet) support O_DIRECT, and if the caching mode you request causes qemu to try O_DIRECT, that would explain why it is failing. -- Eric Blake eblake redhat com +1-919-301-3266 Libvirt virtualization library http://libvirt.org
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