On Mon, Mar 25, 2019 at 6:59 PM shuah <shuah@xxxxxxxxxx> wrote: > 1. I plan to fix the tool to make it run on older kernels (pre-USB 3.0). Great, thanks! We will probably do something downstream anyway, based off the work David has done. But it would be great if upstream supported this too. > 2. I don't plan to support old tool running on new kernels. It doesn't > make sense considering the security fixes. You can use the latest on > older kernels (pre-USB 3.0). Agreed for sufficiently-old tools. (Say, for instance, before this year, where it seems we now agree that the interface shouldn't change unnecessarily.) But eventually, this is an essential part of any mature interface: that today's tools don't break on tomorrow's kernel. (And yes, Greg noted that old things must die eventually, esp. for such low-level stuff, so that might not be true for sufficiently long values of "tomorrow." But it shouldn't be taken lightly.) I think we already more or less agreed on that, but in case we didn't, I want to make the disagreement clear. > 3. I am going to assume you are *using* the latest stable kernels that > have the security fixes. That's a reasonable assumption. It's not necessarily a true one (prior to 4.4, where we started taking that seriously), but where it's not true, it's our problem not yours. Thanks, Brian
