To chime in on the client topic, we have a pretty wide mix of kernels in use and haven't really seen any issues aside from some oddities specific to 4.14 / 5.3 on armhf (embedded dev systems). I know 5.13.4 is fine on the client side. ----- Original Message ----- > From: "hedrick" <hedrick@xxxxxxxxxxx> > To: "Chuck Lever" <chuck.lever@xxxxxxxxxx> > Cc: "Timothy Pearson" <tpearson@xxxxxxxxxxxxxxxxxxxxx>, "J. Bruce Fields" <bfields@xxxxxxxxxxxx>, "linux-nfs" > <linux-nfs@xxxxxxxxxxxxxxx> > Sent: Tuesday, August 10, 2021 10:03:48 AM > Subject: Re: CPU stall, eventual host hang with BTRFS + NFS under heavy load > FYI, we’re reasonably sure 5.8 is OK on the client side. We don’t have much > testing with 5.4, but we’re hoping current patch levels of 5.4 are as well. So > we’re not really reporting anything here about the client side. (I’ve looked at > both upstream and Ubuntu kernel source. They’re pretty good about following the > upstream NFS source.) > >> On Aug 9, 2021, at 1:37 PM, Chuck Lever III <chuck.lever@xxxxxxxxxx> wrote: >> >>> We’ve also had a history of issues with 4.2 problems on clients. That’s why we >>> backed off to 4.0 initially. Clients were seeing hangs. >> > > Let's stick with the server issue for the moment.
