On Sun, Apr 28, 2024 at 02:07:27PM +0800, Wen Gu wrote: > This patch set acts as the second part of the new version of [1] (The first > part can be referred from [2]), the updated things of this version are listed > at the end. > > - Background > > SMC-D is now used in IBM z with ISM function to optimize network interconnect > for intra-CPC communications. Inspired by this, we try to make SMC-D available > on the non-s390 architecture through a software-implemented Emulated-ISM device, > that is the loopback-ism device here, to accelerate inter-process or > inter-containers communication within the same OS instance. Just FYI: Cilium has implemented this kind of shortcut with sockmap and sockops. In fact, for intra-OS case, it is _very_ simple. The core code is less than 50 lines. Please take a look here: https://github.com/cilium/cilium/blob/v1.11.4/bpf/sockops/bpf_sockops.c Like I mentioned in my LSF/MM/BPF proposal, we plan to implement similiar eBPF things for inter-OS (aka VM) case. More importantly, even LD_PRELOAD is not needed for this eBPF approach. :) Thanks.
