6628232 zfs snapshot -r is very slow, causes systemic slowdown

[matthew.ahr...@sun.com]

Author: ahrens
Repository: /hg/onnv/onnv-gate
Latest revision: 81f1af42bafcd8ccab151525c119ad0a9beef897
Total changesets: 1
Log message:
6628232 zfs snapshot -r is very slow, causes systemic slowdown

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