On Thu, 2017-01-19 at 11:03 -0700, Jason Gunthorpe wrote: > sysfs is unpopular because the 'one value per file' dogma is laregly > unsuitable for complex mulit-value atomic changes which are common in > netdev. You can force it to work, but it is pretty horrible.. > > It is also very expensive if you want to shuttle a lot of data, eg I > could not see doing something like 'netstat' for IB through sysfs
Since the RDMA sysfs ABI defines a user space ABI and since user space ABIs must be backwards compatible removing the existing sysfs ABI is not an option. We will need to evaluate on a case-by-case basis whether new functionality should use sysfs or whether another mechanism should be used. Bart.
