Hi, > > In virt-manager I saw that there's the option for cache writeback for > > storage devices. > > I'm wondering: does this also make kvm to ignore write barriers invoked > > by the virtual machine? > > No, that would be unsafe. When the guest issues a flush then QEMU will > ensure that data reaches the disk with -drive cache=writeback.
Aha so the writeback behaves like the consume harddisks with write-cache on them. In that case maybe an extra note could be added to the virt-manager (excellent software by the way!) that if the client vm supports barriers, that write-back in that case then is safe. Agree? Folkert van Heusden -- Ever wonder what is out there? Any alien races? Then please support the seti@home project: setiathome.ssl.berkeley.edu ---------------------------------------------------------------------- Phone: +31-6-41278122, PGP-key: 1F28D8AE, www.vanheusden.com -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
