Jamie Lokier wrote: >> I've basically got a choice of making libvirt always ad '-aio linux' >> or never add it at all. My inclination is to the latter since it is >> compatible with existing QEMU which has no -aio option. Presumably >> '-aio linux' is intended to provide some performance benefit so it'd >> be nice to use it. If we can't express some criteria under which it >> should be turned on, I can't enable it; where as if you can express >> some criteria, then QEMU should apply them automatically. >> > > I'm of the view that '-aio auto' would be a really good option - and > when it's proven itself, it should be the default. It could work on > all QEMU hosts: it would pick synchronous IO when there is nothing else. >
Right now, not specifying the -aio option is equivalent to your proposed -aio auto. I guess I should include an info aio to let the user know what type of aio they are using. We can add selection criteria later but semantically, not specifying an explicit -aio option allows QEMU to choose whichever one it thinks is best. Regards, Anthony Liguori ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone _______________________________________________ kvm-devel mailing list kvm-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/kvm-devel
