6377670 zil_replay() does unnecessary txg_wait_synced(), slowing down mount

[neil.per...@sun.com]

Author: perrin
Repository: /hg/onnv/onnv-gate
Revision: 12a0e0044eff0704af3ad6b2bfc53d28e0c6cfe1
Log message:
6377670 zil_replay() does unnecessary txg_wait_synced(), slowing down mount

Files:
        update: usr/src/uts/common/fs/zfs/zil.c