On Thu, Jun 12, 2025 at 11:58:27AM -0400, Chuck Lever wrote: > On 6/12/25 11:56 AM, Mike Snitzer wrote: > > On Thu, Jun 12, 2025 at 10:17:22AM -0400, Benjamin Coddington wrote: > >> > >> What's already been mentioned elsewhere, but not yet here: > >> > >> The transmitter could always just tell the receiver where the data is, we'd > >> need an NFS v3.1 and an extension for v4.2? > >> > >> Pot Stirred, > >> Ben > > > > Yeah, forgot to mention giving serious consideration to extending > > specs to make this happen easier. Pros and cons to doing so. > > > > Thanks for raising it. > > > > Mike > > NFS/RDMA does this already. Let's not re-invent the wheel. TCP is ubiquitous, I know you seem to really not want us to seriously pursue fixing/improving things to allow for the WRITE payload to be stored in an aligned buffer that allows zero-copy but... the value of not requiring any RDMA hardware or client changes is too compelling to ignore. RDMA either requires specialized hardware or software (soft-iwarp or soft-roce). Imposing those as requirements isn't going to be viable for a large portion of existing deployments.
