On Thu, Apr 08, 2010 at 10:05:09AM +0400, Michael Tokarev wrote: > LVM volumes. This is because with cache=none, the virtual disk > image is opened with O_DIRECT flag, which means all I/O bypasses > host scheduler and buffer cache.
O_DIRECT does not bypass the I/O scheduler, only the page cache. -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
