Hi Greg- > On Aug 10, 2020, at 9:52 AM, Greg KH <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > > On Tue, Aug 04, 2020 at 10:47:26PM +0200, Timo Rothenpieler wrote: >> Sorry if this is not the right approach to this, but I'd like to request a >> backport of 412055398b9e67e07347a936fc4a6adddabe9cf4, "nfsd: Fix NFSv4 READ >> on RDMA when using readv" to Linux 5.4. >> >> The patch applies cleanly and fixes a rare but severe issue with NFS over >> RDMA, which I just spent several days tracking down to that patch, with >> major help from linux-nfs/rdma. >> >> I have right now manually applied it to my 5.4 Kernel and can confirm it >> fixes the issue. > > It's good to cc: the developers/maintainers of the patch you are asking > about, to see if they object or not. > > Chuck, any objection for the above patch being added to 5.4 and maybe > 4.19? Since Timo applied it to 5.4 and tested it, I have no objection there. v4.19 suffers from the same bug, but I don't have reports of anyone having tried 4120553 on that kernel. I would say wait on that one until someone can state that it works without regression. -- Chuck Lever
