On Wed 06-11-19 07:15:35, Jens Axboe wrote: > 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. Thanks! Honza -- Jan Kara <jack@xxxxxxxx> SUSE Labs, CR
