On Thu, 2022-10-06 at 12:20 -0400, Chuck Lever wrote:

I'm proposing this series as the first NFSD-related patchset to go
into v6.2 (for-next), though I haven't opened that yet.

For quite some time, we've been encouraged to disable filecache
garbage collection for NFSv4 files, and I think I found a surgical
way to do just that. That is presented in "NFSD: Add an NFSD_FILE_GC
flag to enable nfsd_file garbage collection".

Comments and opinions are welcome.

Changes since RFC:
- checking nfs4_files for inode aliases is now done only on hash
  insertion
- the nfs4_file reference count is now bumped only while the RCU
  read lock is held
- comments and function names have been revised and clarified

I haven't updated the new @want_gc parameter... jury is still out.

It was just a nit I noticed since it looked like it was being used as a
bool. If you think it needs to be an int, then so be it.

---

Chuck Lever (7):
      NFSD: Pass the target nfsd_file to nfsd_commit()
      NFSD: Revert "NFSD: NFSv4 CLOSE should release an nfsd_file immediately"
      NFSD: Add an NFSD_FILE_GC flag to enable nfsd_file garbage collection
      NFSD: Use const pointers as parameters to fh_ helpers.
      NFSD: Use rhashtable for managing nfs4_file objects
      NFSD: Clean up nfs4_preprocess_stateid_op() call sites
      NFSD: Trace delegation revocations

Jeff Layton (2):
      nfsd: fix nfsd_file_unhash_and_dispose
      nfsd: rework hashtable handling in nfsd_do_file_acquire


 fs/nfsd/filecache.c | 165 +++++++++++++++---------------
 fs/nfsd/filecache.h |   4 +-
 fs/nfsd/nfs3proc.c  |  10 +-
 fs/nfsd/nfs4proc.c  |  42 ++++----
 fs/nfsd/nfs4state.c | 241 ++++++++++++++++++++++++++++++--------------
 fs/nfsd/nfsfh.h     |  10 +-
 fs/nfsd/state.h     |   5 +-
 fs/nfsd/trace.h     |  58 ++++++++++-
 fs/nfsd/vfs.c       |  19 ++--
 fs/nfsd/vfs.h       |   3 +-
 10 files changed, 351 insertions(+), 206 deletions(-)

I been doing some testing with this and it seems to be working well. You
can add:

Tested-by: Jeff Layton <jlayton@kernel.org>