| commit | 301bfa483016d48b7fb9cbad87c0a04a15c25b90 | [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 16:57:18 2017 -0400 |
| tree | 1e86b94a773529cae5a3144e03ff7b35f7673188 | |
| parent | 00422483ad415d6267d36711f0e51f4bbbd653ed [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>