On Mon, 2018-11-19 at 21:09 +-0200, Leon Romanovsky wrote: +AD4 The more accurate question is +ACI-how many customers ... use latest, +AD4 upstream kernel?+ACI Hi Leon, If this would not be clear: I am in favor of removing kernel drivers that are no longer in use. Recently I supported a proposal to remove the SCSI OSD driver from the kernel tree because that driver probably has not been used by anyone in the past five years. But I think that kernel drivers that are still in use should stay in the kernel tree, no matter which version is in use. Since the Linux kernel ABI is backwards compatible, with every Linux distro it is possible to replace the Linux kernel that was provided by the Linux distributor with a more recent upstream kernel. I think it would be a very unpleasant surprise for people who use one of the RDMA adapters that only support FMR if they would test a more recent kernel and if they would notice that its driver has been removed. Bart.
