NFSv4.1: Optimise layout return-on-close
authorTrond Myklebust <trond.myklebust@primarydata.com>
Sat, 24 Jan 2015 18:54:37 +0000 (13:54 -0500)
committerTrond Myklebust <trond.myklebust@primarydata.com>
Sat, 24 Jan 2015 23:46:48 +0000 (18:46 -0500)
commit40dd4b7aee1a8c3b8dac7b67ba710692d7691b77
tree43d0c0de69e2d95331f62e1150dcfab70f5ec5b2
parentb4019c0e219bb1301865f8b2efedb4773526ed91
NFSv4.1: Optimise layout return-on-close

Optimise the layout return on close code by ensuring that

1) Add a check for whether we hold a layout before taking any spinlocks
2) Only take the spin lock once
3) Use nfs_state->state to speed up open file checks

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
fs/nfs/nfs4proc.c
fs/nfs/pnfs.c
fs/nfs/pnfs.h