On Thu, Jan 19, 2017 at 10:06:12PM +0000, Bart Van Assche wrote: > 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.
Not talking about getting rid of it. But if it makes sense to use netlink for the new stuff we should make netlink self-consistent so a netlink user does not have to fall back to sysfs for certain things. Jason
