Re: memory (mbuf) leak in fxp driver.

[Camiel Dobbelaar <cd@sentia.nl>]

> * the problem seems to exist in 2.7, 2.8, and 2.9 (beta). I haven't checked
> -current.

I don't have problems with 2.7-stable, this (bridge) machine filters a 4Mbit 
link. 

pengo:/home/camield $ netstat -m
541 mbufs in use:
        527 mbufs allocated to data
        13 mbufs allocated to packet headers
        1 mbuf allocated to socket names and addresses
256/450 mapped pages in use
967 Kbytes allocated to network (59% in use)
0 requests for memory denied
0 requests for memory delayed
0 calls to protocol drain routines

pengo:/home/camield $ vmstat -m
Memory statistics by bucket size
    Size   In Use   Free   Requests  HighWater  Couldfree
      16     1646    146   22140416    1280          0
      32     1117    291   14008431     640          8
      64     1986    510  147712885     320        523
     128     2690   7454 1545351716     160   39083583
     256     3412     92    9568403      80         49
     512       84     76    7648996      40     202999
    1024      162     22   22963168      20     303586
    2048        9      7      27599      10          0
    4096       29     10      85801       5      80182
    8192        2      0          2       5          0
   16384        9      0          9       5          0
   32768        6      0        322       5          0
   65536        1      0          1       5          0
  131072        1      0          1       5          0

netstat -in output, heavily edited. Counters overflowed.
Name    Mtu         Ipkts  Ierrs       Opkts Oerrs     Coll 
fxp0    1500  -1946629836 242864  1506465332     0 21774535
fxp1    1500   1507653787     27  1628895185     0  5780973
bridge0 1500   -436448576      0 -1159605186     0        0

pengo:/home/camield $  uptime
 8:29AM  up 146 days, 22:24, 1 user, load averages: 1.10, 1.10, 1.08


Kernel is not GENERIC, but has these changes:

+option         NMBCLUSTERS=8192
+option         NKMEMCLUSTERS=8192
+option         MAX_KMAP=40
+option         BUFCACHEPERCENT=20
+
+option         IPSTATE_MAX=16000
+option         IPSTATE_SIZE=12289

-maxusers       32              # estimated number of users
+maxusers       64              # estimated number of users


--
Cam