Hi, I was interested in testing these patches with our re-export workloads. However, it looks like this specific patch and the previous one (nfsd: Distinguish between required and optional NFSv3 post-op attributes) are breaking re-exports in such a way as to cause applications to randomly crash out with sigbus errors. At a guess, loading applications and memory mapping data files are particularly good at triggering this. I can see no errors logged on either the re-export server or the eventual client (e.g. stale filehandles). We mostly re-export NFSv4.2 servers to NFSv3 clients but we do also have a few NFSv3 servers re-exported as NFSv3 too (Netapps). This only happens with patches 4 + 5 and vanilla 5.16-rc6 does not have any issues. I haven't had a chance to dig much deeper yet, but thought I'd flag it anyway. Daire On Sun, 19 Dec 2021 at 01:44, <trondmy@xxxxxxxxxx> wrote: > > From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx> > > Allow knfsd to request weak cache consistency attributes on files that > have delegations and/or have up to date attribute caches by propagating > the information to NFS that the attributes being requested are optional.
