On 11/6/19 3:53 AM, Jan Kara wrote: > Hello, > > with transition to blk-mq, the elevator= kernel argument was removed. I > understand the reasons for its removal but still I think this may come as a > surprise to some users since that argument has been there for ages and > although distributions generally transition to setting appropriate elevator > by udev rules, there are still people that use that argument with older > kernels and there are quite a few advices on the Internet to use it. So > shouldn't we at least warn loudly if someone uses elevator= argument on > kernels that don't support it and redirect people to sysfs? Something like > the attached patch? What do people think? I'm fine with that, my objects have always been centered around trying to make the parameter work. A warning makes sense to point people in the right direction. I'll add this for 5.5. -- Jens Axboe
