[Cluster-devel] [PATCH 0/9] gfs2: glock instantiation and holder auto-demotion fixes

[Andreas Gruenbacher]

So far, glocks were instantiated inside of do_promote() as part of the
glock state engine logic.  This code can be moved outside the state
engine, which simplifies things significantly.  We no longer need to
release and re-acquire the glock spin lock in do_promote(), so the glock
holder we're trying to instantiate can no longer go away under us by
accident.  (Function do_promote() isn't always run in process context.)

To facilitate that, first fix and clean up gfs2_glock_async_wait() to
take advantage of the fact that canceling glock operations now works
properly.

With the above changes in place, split off a new go_held() glock
operation for actions to be performed whenever a new holder for a glock
is granted:  some of the actions carried out by inode_go_instantiate()
are meant to be carried out repeatedly, so move those over to the new
inode_go_held() handler.

Finally, Bob has found the remaining bug in the glock holder
auto-demotion feature we've disabled for 5.18; fix that and re-enable
the feature.

Thanks,
Andreas

Andreas Gruenbacher (8):
  gfs2: Fix up gfs2_glock_async_wait
  gfs2: Instantiate glocks ouside of glock state engine
  gfs2: Revert 'Fix "truncate in progress" hang'
  gfs2: Add new go_held glock operation
  gfs2: Make go_instantiate take a glock
  gfs2: Use better variable name
  gfs2: List traversal in do_promote is safe
  Revert "gfs2: Stop using glock holder auto-demotion for now"

Bob Peterson (1):
  gfs2: do_promote glock holder stealing fix

 fs/gfs2/file.c       |  46 +++++++----
 fs/gfs2/glock.c      | 187 +++++++++++++++++--------------------------
 fs/gfs2/glock.h      |   2 +-
 fs/gfs2/glops.c      |  31 ++++---
 fs/gfs2/incore.h     |   6 +-
 fs/gfs2/main.c       |   1 -
 fs/gfs2/ops_fstype.c |   2 -
 fs/gfs2/quota.c      |  28 +------
 fs/gfs2/rgrp.c       |   3 +-
 fs/gfs2/rgrp.h       |   2 +-
 fs/gfs2/super.c      |   2 +-
 11 files changed, 126 insertions(+), 184 deletions(-)

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2.35.1