Revert "Remove TSD zfs_fsyncer_key"
This reverts commit 31f2b5abdf95d8426d8bfd66ca7f62ec70215e3c back
to the original code until the fsync(2) performance regression
can be addressed.
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Revert "Remove TSD zfs_fsyncer_key" Tags None Referenced Files None Subscribers None
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