Alexander Motin 5b3a65823d Skip extra bcopy() when scrubbing vdev without redundancy. ...

According to profiler, this bcopy() can use about 10% of CPU time.

MFC after:	2 weeks

2015-01-12 22:38:55 +00:00

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opensolaris

Skip extra bcopy() when scrubbing vdev without redundancy.

2015-01-12 22:38:55 +00:00