Merge tag 'gfs2-for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2

Pull gfs2 updates from Andreas Gruenbacher:

 - Don't cache unreferenced glocks: when a glock is no longer referenced
   (for example, because the inode it protects is evicted), it is now
   released as soon as possible instead of leaving it around until
   memory pressure or an unmount forces it out.

   For some workloads, this saves a lot of memory and speeds up unmounts
   significantly.

 - Harden gfs2_glock_hold() by making sure the caller holds a reference
   and fix a related race in checking for the liveliness of glocks
   between gdlm_bast() and gfs2_glock_cb().

* tag 'gfs2-for-7.3' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2:
  gfs2: harden gfs2_glock_hold
  gfs2: Remove the glock lru list and shrinker
  gfs2: Skip dlm unlocks earlier
  gfs2: Don't cache unreferenced glocks
  gfs2: Enable automatic glock hash table shrinking

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