6485031 msgsnd can preallocate small buffers

[nore...@opensolaris.org]

Author: dv142724
Repository: /hg/onnv/onnv-gate
Revision: 88cd8c827fb93f87985f6da751e4f0ee1483d263
Log message:
6485031 msgsnd can preallocate small buffers

Files:
        update: usr/src/uts/common/os/msg.c