On Wed, 27 Jun 2012 00:41:06 +0300, "Michael S. Tsirkin" <mst@xxxxxxxxxx> wrote: > On Tue, Jun 26, 2012 at 01:32:58PM -0700, Frank Swiderski wrote: > > This implementation of a virtio balloon driver uses the page cache to > > "store" pages that have been released to the host. The communication > > (outside of target counts) is one way--the guest notifies the host when > > it adds a page to the page cache, allowing the host to madvise(2) with > > MADV_DONTNEED. Reclaim in the guest is therefore automatic and implicit > > (via the regular page reclaim). This means that inflating the balloon > > is similar to the existing balloon mechanism, but the deflate is > > different--it re-uses existing Linux kernel functionality to > > automatically reclaim. > > > > Signed-off-by: Frank Swiderski <fes@xxxxxxxxxx> > > I'm pondering this: > > Should it really be a separate driver/device ID? > If it behaves the same from host POV, maybe it > should be up to the guest how to inflate/deflate > the balloon internally? Well, it shouldn't steal ID 10, either way :) Either use a completely bogus number, or ask for an id. But AFAICT this should be a an alternate driver of for the same device: it's not really a separate device, is it? Cheers, Rusty. -- 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
