[PATCH 0/5] Remove possible deadlocks in nfs_release_page() - V3

[NeilBrown]

This set includes acked-by's from Andrew and Peter so it should be
OK for all five patches to go upstream through the NFS tree.

I split the congestion tracking patch out from the wait-for-PG_private
patch as they are conceptually separate.

This set continues to perform well in my tests and addresses all
issues that have been raised.

Thanks a lot,
NeilBrown


---

NeilBrown (5):
      SCHED: add some "wait..on_bit...timeout()" interfaces.
      MM: export page_wakeup functions
      NFS: avoid deadlocks with loop-back mounted NFS filesystems.
      NFS: avoid waiting at all in nfs_release_page when congested.
      NFS/SUNRPC: Remove other deadlock-avoidance mechanisms in nfs_release_page()


 fs/nfs/file.c                   |   29 +++++++++++++++++++----------
 fs/nfs/write.c                  |    7 +++++++
 include/linux/pagemap.h         |   12 ++++++++++--
 include/linux/wait.h            |    5 ++++-
 kernel/sched/wait.c             |   36 ++++++++++++++++++++++++++++++++++++
 mm/filemap.c                    |   21 +++++++++++++++------
 net/sunrpc/sched.c              |    2 --
 net/sunrpc/xprtrdma/transport.c |    2 --
 net/sunrpc/xprtsock.c           |   10 ----------
 9 files changed, 91 insertions(+), 33 deletions(-)

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