6431599 system hang under heavy /proc access

[sudheer.abdul-sa...@sun.com]

Author: sudheer
Repository: /hg/onnv/onnv-gate
Revision: 5349d2ad92f263b6e34dd9d8fbe12acdf405669f
Log message:
6431599 system hang under heavy /proc access

Files:
        update: usr/src/uts/common/fs/proc/prsubr.c