[PATCH 00/22] pnfs more wave2 patches

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These are on top of the current pnfs-submit rebased onto 2.6.37-rc5,
per Benny's suggestion.

More wave2 (CB_LAYOUTRECALL and LAYOUTRETURN) patches, based on
internal review as well as comments from Trond.  These implement a completely
forgetful model.  The client will *never* send LAYOUTRETURN.  We also
don't do any waiting in LAYOUTGET, instead falling back to MDS at the
smallest sign of trouble.

patches 1 - 7 revert previous roc changes, which are unecessary given
that we are not returning anything

patch 8 reverts a fix already done in mainline in a different way

patch 9 prevents a pointless reordering in the cumulative diff

patch 10 fixes a COMMIT bug tickled by the new code

patch 11 - 20 remove LAYOUTRETURN and fix various review issues

patch 21 just brings an existing post-submit patch into the submit branch

patch 22 turns off LAYOUTCOMMIT.  It is a temporary stop gap until
code can be rearranged so the LAYOUTCOMMIT code can be easily pushed
outside of the pnfs-submit branch

Fred

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