malloc(9) statistics.

Hi.

I spend few hours today tracking memory leak. At the end I found, that
there were no memory leak actually, but memory statistics are confusing.

Command 'vmstat -m' shows number of allocations in column named "InUse".
Coulmn name is wrong and confusing. The column only shows how many
allocation were there (successful or not), so when malloc(..., M_NOWAIT)
fails, it increases InUse value, which is never decreased, because there
will be no corresponding free(9).

I've two proposals:

1. Don't increase allocations counter on failure:

	http://people.freebsd.org/~pjd/patches/kern_malloc.c.patch

2. Change "InUse" name to something else.

-- 
Pawel Jakub Dawidek                       http://www.wheel.pl
pjd_at_FreeBSD.org                           http://www.FreeBSD.org
FreeBSD committer                         Am I Evil? Yes, I Am!