linux-kernel - [PATCH 00/12 v5] locks: avoid thundering-herd wake-ups

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Date:   Mon, 12 Nov 2018 12:14:48 +1100
From:   NeilBrown <neilb@...e.com>
To:     Jeff Layton <jlayton@...nel.org>,
        Alexander Viro <viro@...iv.linux.org.uk>
Cc:     "J. Bruce Fields" <bfields@...ldses.org>,
        Martin Wilck <mwilck@...e.de>, linux-fsdevel@...r.kernel.org,
        Frank Filz <ffilzlnx@...dspring.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 00/12 v5] locks: avoid thundering-herd wake-ups

Changes:
 - field names improved as requested by Bruce.
   "fl_blocked_requests" is a list of blocked requests,
   linked through fl_block_member
 - the introductory text has been moved to a commit comment
   as suggested by Bruce
 - documentation added to locks.c as suggested by Bruce - I made
   a few little changes
 - flock_make_lock() now properly initialized a lock - using
   the code from Jeff
 - code actually compiles for ocfs2 and gfs2

Thanks,
NeilBrown


---

NeilBrown (12):
      fs/locks: rename some lists and pointers.
      fs/locks: split out __locks_wake_up_blocks().
      NFS: use locks_copy_lock() to copy locks.
      gfs2: properly initial file_lock used for unlock.
      ocfs2: properly initial file_lock used for unlock.
      locks: use properly initialized file_lock when unlocking.
      fs/locks: allow a lock request to block other requests.
      fs/locks: always delete_block after waiting.
      fs/locks: change all *_conflict() functions to return bool.
      fs/locks: create a tree of dependent requests.
      locks: merge posix_unblock_lock() and locks_delete_block()
      VFS: locks: remove unnecessary white space.


 fs/cifs/file.c                  |    4 
 fs/gfs2/file.c                  |   10 +
 fs/lockd/svclock.c              |    2 
 fs/locks.c                      |  319 ++++++++++++++++++++++++---------------
 fs/nfs/nfs4proc.c               |    6 -
 fs/nfsd/nfs4state.c             |    6 -
 fs/ocfs2/locks.c                |   10 +
 include/linux/fs.h              |   13 +-
 include/trace/events/filelock.h |   16 +-
 9 files changed, 230 insertions(+), 156 deletions(-)

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