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To: Steven Wallace <swallace@ece.uci.edu>
cc: freebsd-bugs@freebsd.org
Subject: Re: malloc() prob in 2.1R? 
In-reply-to: Your message of "Fri, 16 Feb 1996 12:07:41 PST."
             <199602162007.MAA11841@newport.ece.uci.edu> 
From: David Greenman <davidg@Root.COM>
Reply-To: davidg@Root.COM
Date: Fri, 16 Feb 1996 13:11:05 -0800
Sender: owner-bugs@freebsd.org
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>I just noticed something bizzar on my 2.1R system.
>After running out of swap space quicker than I expected,
>I tried running a testswap program that simply continues to malloc
>a page (4K) of memory until it dies.  At any point I suspend the program
>and check it with ps, ps reports a VSZ twice which I have allocated
>with malloc!  On my 2.2-current (as of 11/21), it reports exactly
>what I have allocated.
>
>Is there some VM bug in 2.1R that went unnoticed or a malloc bug in 2.1R?

   It's not really a bug. It's caused by the Berkeley malloc behaving badly
with power-of-two sized allocations.

-DG

David Greenman
Core Team/Principal Architect, The FreeBSD Project