Re: Backport request: nfsd: Fix NFSv4 READ on RDMA when using readv

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?

thanks,

greg k-h