6456888 zpool scrubbing leads to memory exhaustion and system hang

[saurabh.mis...@sun.com]

Author: mishra
Repository: /hg/onnv/onnv-gate
Latest revision: 5340a4d98e0b711fc99a45e8d76f61cb40ff0c05
Total changesets: 1
Log message:
6456888 zpool scrubbing leads to memory exhaustion and system hang

Files:
        update: usr/src/uts/common/fs/zfs/spa.c
        update: usr/src/uts/common/fs/zfs/sys/spa.h
        update: usr/src/uts/common/fs/zfs/sys/spa_impl.h
        update: usr/src/uts/common/fs/zfs/sys/vdev_impl.h
        update: usr/src/uts/common/fs/zfs/vdev.c
        update: usr/src/uts/common/fs/zfs/vdev_queue.c