| commit | b4f937cffa66b3d56eb8f586e620d0b223a281a3 | [log] [tgz] |
|---|---|---|
| author | Trond Myklebust <trond.myklebust@primarydata.com> | Tue Jul 11 17:53:48 2017 -0400 |
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | Thu Jul 13 17:12:07 2017 -0400 |
| tree | 1e86b94a773529cae5a3144e03ff7b35f7673188 | |
| parent | 20fa19027286983ab2734b5910c4a687436e0c31 [diff] |
NFS: Don't run wake_up_bit() when nobody is waiting... "perf lock" shows fairly heavy contention for the bit waitqueue locks when doing an I/O heavy workload. Use a bit to tell whether or not there has been contention for a lock so that we can optimise away the bit waitqueue options in those cases. Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>