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authorTrond Myklebust <trond.myklebust@primarydata.com>2017-07-11 17:53:48 -0400
committerAnna Schumaker <Anna.Schumaker@Netapp.com>2017-07-13 17:12:07 -0400
commitb4f937cffa66b3d56eb8f586e620d0b223a281a3 (patch)
tree1e86b94a773529cae5a3144e03ff7b35f7673188 /certs
parent20fa19027286983ab2734b5910c4a687436e0c31 (diff)
download96b-common-b4f937cffa66b3d56eb8f586e620d0b223a281a3.tar.gz
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>
Diffstat (limited to 'certs')
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