Hi Rusty, here are two improvements to the virtio-blk spec. The first documents the status quo of an extension that has already been supported in QEMU for several releases, but never made it to the official spec.
The second adds support for toggling the cache mode between writethrough and writeback. Two mechanisms are introduced for this. One is to not negotiate VIRTIO_BLK_F_FLUSH; it can be done only at reset time and is more of a refinement geared towards older or limited guests, in order to make them safe wrt power losses. The second is via feature bits and a new configuration field. Paolo Bonzini (2): virtio-blk spec: document topology info virtio-blk spec: writeback cache enable improvements virtio-spec.lyx | 136 +++++++++++++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 132 insertions(+), 4 deletions(-) -- 1.7.10.2 -- 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
