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  1. 23 Jul, 2010 2 commits
  3. 07 Jul, 2010 1 commit
    • Chuck Lever's avatar
      NFSD: Fill in WCC data for REMOVE, RMDIR, MKNOD, and MKDIR · 43a9aa64
      Chuck Lever authored 
      Some well-known NFSv3 clients drop their directory entry caches when
they receive replies with no WCC data.  Without this data, they
employ extra READ, LOOKUP, and GETATTR requests to ensure their
directory entry caches are up to date, causing performance to suffer
needlessly.

In order to return WCC data, our server has to have both the pre-op
and the post-op attribute data on hand when a reply is XDR encoded.
The pre-op data is filled in when the incoming fh is locked, and the
post-op data is filled in when the fh is unlocked.

Unfortunately, for REMOVE, RMDIR, MKNOD, and MKDIR, the directory fh
is not unlocked until well after the reply has been XDR encoded.  This
means that encode_wcc_data() does not have wcc_data for the parent
directory, so none is returned to the client after these operations
complete.

By unlocking the parent directory fh immediately after the internal
operations for each NFS procedure is complete, the post-op data is
filled in before XDR encoding starts, so it can be returned to the
client properly.
Signed-off-by: default avatarChuck Lever <chuck.lever@oracle.com>
Signed-off-by: default avatarJ. Bruce Fields <bfields@citi.umich.edu>
      43a9aa64
  5. 06 Jul, 2010 2 commits
    • J. Bruce Fields's avatar
      nfsd4: comment nitpick · 6a85d6c7
      J. Bruce Fields authored 
      Reported-by: default avatar"Madan, Anshul" <Anshul.Madan@netapp.com>
Signed-off-by: default avatarJ. Bruce Fields <bfields@citi.umich.edu>
      6a85d6c7
    • Artem Bityutskiy's avatar
      sunrpc: make the cache cleaner workqueue deferrable · 8eab945c
      Artem Bityutskiy authored 
      This patch makes the cache_cleaner workqueue deferrable, to prevent
unnecessary system wake-ups, which is very important for embedded
battery-powered devices.

do_cache_clean() is called every 30 seconds at the moment, and often
makes the system wake up from its power-save sleep state. With this
change, when the workqueue uses a deferrable timer, the
do_cache_clean() invocation will be delayed and combined with the
closest "real" wake-up. This improves the power consumption situation.

Note, I tried to create a DECLARE_DELAYED_WORK_DEFERRABLE() helper
macro, similar to DECLARE_DELAYED_WORK(), but failed because of the
way the timer wheel core stores the deferrable flag (it is the
LSBit in the time->base pointer). My attempt to define a static
variable with this bit set ended up with the "initializer element is
not constant" error.

Thus, I have to use run-time initialization, so I created a new
cache_initialize() function which is called once when sunrpc is
being initialized.
Signed-off-by: default avatarArtem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: default avatarJ. Bruce Fields <bfields@citi.umich.edu>
      8eab945c
  7. 24 Jun, 2010 2 commits
  9. 23 Jun, 2010 1 commit
  11. 22 Jun, 2010 3 commits
  13. 31 May, 2010 4 commits
  15. 30 May, 2010 25 commits
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