From: utzoo!decvax!decwrl!sun!megatest!p500vax:pat
Newsgroups: net.bugs
Title: sbrk inertia
Article-I.D.: p500vax.180
Posted: Mon Mar 21 22:13:19 1983
Received: Wed Mar 23 07:59:42 1983

Calls to sbrk(II) appear to have a delayed effect in our Berkeley VAX 4.1 
system.

main()
{
	printf( "sbrk(0) = %x\n", sbrk(0) );
	printf( "sbrk(1) = %x\n", sbrk(1) );
	printf( "sbrk(0) = %x\n", sbrk(0) );
}

produces the following output:

sbrk(0) = 19c4
sbrk(1) = 19c4
sbrk(0) = 19c5