> If an nfsd thread only completes the close that it initiated the close > on (which is what I am currently proposing) then there would be at most > one, or maybe 2, fds to close after handling each request. While that > is certainly a non-zero burden, I can't see how it can realistically be > called a DOS. The 10s of millions of files is what makes me curious. Because that's the workload that'd be interesting. > > It feels that this really needs to be tested under a similar workload in > > question to see whether this is a viable solution. > > > > Creating that workload might be a challenge. I know it involved > accessing 10s of millions of files with a server that was somewhat > memory constrained. I don't know anything about the access pattern. > > Certainly I'll try to reproduce something similar by inserting delays in > suitable places. This will help exercise the code, but won't really > replicate the actual workload.