10.0-RC1: bad mbuf leak?

[Mark Felder]

It's not looking promising. mbuf usage is really high again. I haven't
hit the point where the system is unavailable on the network but it
appears to be approaching.

root at skeletor:/usr/home/feld # netstat -m
4093391/3109/4096500 mbufs in use (current/cache/total)
1025/1725/2750/1017354 mbuf clusters in use (current/cache/total/max)
1025/1725 mbuf+clusters out of packet secondary zone in use
(current/cache)
0/492/492/508677 4k (page size) jumbo clusters in use
(current/cache/total/max)
0/0/0/150719 9k jumbo clusters in use (current/cache/total/max)
0/0/0/84779 16k jumbo clusters in use (current/cache/total/max)
1025397K/6195K/1031593K bytes allocated to network (current/cache/total)
0/0/0 requests for mbufs denied (mbufs/clusters/mbuf+clusters)
0/0/0 requests for mbufs delayed (mbufs/clusters/mbuf+clusters)
0/0/0 requests for jumbo clusters delayed (4k/9k/16k)
0/0/0 requests for jumbo clusters denied (4k/9k/16k)
0 requests for sfbufs denied
0 requests for sfbufs delayed
0 requests for I/O initiated by sendfile

root at skeletor:/usr/home/feld # vmstat -z | grep mbuf
mbuf_packet:            256, 6511065,    1025,    1725, 9153363,   0,  
0
mbuf:                   256, 6511065, 4092367,    1383,74246554,   0,  
0
mbuf_cluster:          2048, 1017354,    2750,       0,    2750,   0,  
0
mbuf_jumbo_page:       4096, 508677,       0,     492, 2655317,   0,   0
mbuf_jumbo_9k:         9216, 150719,       0,       0,       0,   0,   0
mbuf_jumbo_16k:       16384,  84779,       0,       0,       0,   0,   0
mbuf_ext_refcnt:          4,      0,       0,       0,       0,   0,   0

root at skeletor:/usr/home/feld # uptime
12:30PM  up 15:05, 1 user, load averages: 0.24, 0.23, 0.27

root at skeletor:/usr/home/feld # uname -a
FreeBSD skeletor.feld.me 10.0-PRERELEASE FreeBSD 10.0-PRERELEASE #17
r260339M: Sun Jan  5 21:23:10 CST 2014