In her later report, the Collabora developer explains that the original proposal saw only a small number of changes, such as opcodes, return values and some fancy names for the buffers, which are now called EventIdx and Shadow Doorbell. She also tells us that the implementation already landed in the mainline Linux kernel. This means that the next time you upgrade your distro’s kernel packages to the newest branch, in this case, we’re talking about Linux 4.12 as it’s the latest version that’s in development at the moment of writing this article, you’ll get those awesome NVMe improvements we’ve been waiting for so long.