On 9/27/11, Robin Lee Powell <rlpowell@xxxxxxxxxxxxxxxxxx> wrote: > On Mon, Sep 26, 2011 at 04:15:37PM +0800, Emmanuel Noobadmin wrote: >> It's unrelated to what you're actually using as the disks, whether >> file or block devices like LVs. I think it just makes KVM tell the >> host not to cache I/O done on the storage device. > > Wait, hold on, I think I had it backwards. > > It tells the *host* to not cache the device in question, or the > *VMs* to not cache the device in question? I'm fairly certain it tells the qemu not to cache the device in question. If you don't want the guest to cache their i/o, then the guest OS should be configured if it allows that. Although I'm not sure if it's possible to disable disk buffering/caching system wide in Linux. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
