----- On 13 Feb, 2021, at 23:30, Chuck Lever chuck.lever@xxxxxxxxxx wrote: >> I don't have a performance system to measure the improvement >> accurately. > > Then let's have Daire try it out, if possible. I'm happy to test it out on one of our 2 x 40G NFS servers with 100 x 1G clients (but it's trickier to patch the clients too atm). Just so I'm clear, this is in addition to Chuck's "Handle TCP socket sends with kernel_sendpage() again" patch from bz #209439 (which I think is now in 5.11 rc)? Or you want to see what this patch looks like on it's own without that (e.g. v5.10)? Daire