On Sat, Jul 08, 2023 at 10:02:59AM +0800, Ming Lei wrote: > Take blk-mq's knowledge into account for calculating io queues. > > Fix wrong queue mapping in case of kdump kernel. > > On arm and ppc64, 'maxcpus=1' is passed to kdump command line, see > `Documentation/admin-guide/kdump/kdump.rst`, so num_possible_cpus() > still returns all CPUs. That's simply broken. Please fix the arch code to make sure it does not return a bogus num_possible_cpus value for these setups, otherwise you'll have to paper over it in all kind of drivers.
