[RFC PATCH 0/4] Snapshot of fixes for SCSI PR key registration

[cel@kernel.org]

From: Chuck Lever <chuck.lever@oracle.com>

With "Fix premature PR key unregistration", generic/069 seems happy
now. It's kind of a brute-force fix, though. The race window narrows
significantly when "Use bulk page allocation APIs" is applied, which
suggests this issue might not appear in every environment.

However, I still see:
 - generic/108 throw PR-related block I/O errors
 - instances of double key registration and unregistration

Looking for comments and advice while I proceed with more
troubleshooting.

Chuck Lever (4):
  nfs/blocklayout: SCSI layout trace points for reservation key
    reg/unreg
  nfs/blocklayout: Report only when /no/ device is found
  nfs/blocklayout: Fix premature PR key unregistration
  nfs/blocklayout: Use bulk page allocation APIs

 fs/nfs/blocklayout/blocklayout.c |  9 ++++-
 fs/nfs/blocklayout/blocklayout.h |  1 +
 fs/nfs/blocklayout/dev.c         | 63 +++++++++++++++++++++-----------
 fs/nfs/nfs4trace.c               |  5 +++
 fs/nfs/nfs4trace.h               | 62 +++++++++++++++++++++++++++++++
 fs/nfs/pnfs_dev.c                | 15 +++-----
 6 files changed, 123 insertions(+), 32 deletions(-)

-- 
2.45.1