Hi Andrew,
this series teaches autofs about RCU-walk so that we don't drop
straight into REF-walk when we hit an autofs directory, and so that
we avoid spinlocks as much as possible when performing an RCU-walk.
This is needed so that the benefits of the recent NFS support for
RCU-walk are fully available when NFS filesystems are automounted.
Patches have been carefully reviewed and tested both with test suites
and in production - thanks a lot to Ian Kent for his support there.
If they could be queued for 3.18, I would appreciate it.
Thanks,
NeilBrown
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NeilBrown (6):
autofs4: allow RCU-walk to walk through autofs4.
autofs4: factor should_expire() out of autofs4_expire_indirect.
autofs4: make "autofs4_can_expire" idempotent.
autofs4: avoid taking fs_lock during rcu-walk
autofs4: d_manage() should return -EISDIR when appropriate in rcu-walk mode.
autofs: the documentation I wanted to read
Documentation/filesystems/autofs4.txt | 520 +++++++++++++++++++++++++++++++++
fs/autofs4/autofs_i.h | 6
fs/autofs4/dev-ioctl.c | 2
fs/autofs4/expire.c | 210 ++++++++-----
fs/autofs4/root.c | 62 +++-
5 files changed, 698 insertions(+), 102 deletions(-)
create mode 100644 Documentation/filesystems/autofs4.txt
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