Hi!
After a recent network configuration change (added re(4), vether(4)) I'm
experiencing this memory leak from somewhere.
How can I check/query how much memory the kernel (or parts of it) is
using over time, besides running top(1) with system processes shown --
I'm also staring at systat(1)'s `malloc' and `pool' views but I'm not
really sure what I'm (or rather what I should be) looking at.
I have an on-board Realtek NIC and an add-on Intel PCIe 4 port NIC.
re0 at pci3 dev 0 function 0 "Realtek 8168" rev 0x0c: RTL8168G/8111G (0x4c00),
msi
em0 at pci1 dev 0 function 0 "Intel I350" rev 0x01: msi
em1 at pci1 dev 0 function 1 "Intel I350" rev 0x01: msi
em2 at pci1 dev 0 function 2 "Intel I350" rev 0x01: msi
em3 at pci1 dev 0 function 3 "Intel I350" rev 0x01: msi
Before I started to experience the leak I had the on-board NIC disabled
in BIOS and only used two ports of the Intel NIC. My setup looked like
this:
== Network
ISP --- pppoe0 <-> em0 -- OpenBSD 6.4 -- em1(dhcpd) --- [switch] LAN
`- athn0 --- LAN
`- athn1 --- LAN
`- bridge0(em1, athn[01])
Internal IP configured on em1.
athn? devices don't have IPs, just bridged to the internal network.
dhcpd(8) is running on em1.
Now I started to use re0 and one more NIC on the Intel card:
ISP --- pppoe0 <-> re0 -- OpenBSD 6.4 -- em0 --- LAN
`- em1 --- LAN
`- em2 --- LAN
`- athn0 --- LAN
`- athn1 --- LAN
`- vether0 (dhcpd)
`- bridge0(em[123], athn[01], vether0)
Now the 4 port Intel NIC basically acts as a switch, the em? interfaces
don't have IP addresses configured, and the athn? interfaces don't have
one either.
I've added a vether(4) interface with an internal IP (same as the em1
have had before) to the bridge, and dhcpd(8) (and everything else that
needs it) now uses that interface.
# ifconfig bridge0
bridge0: flags=41
index 10 llprio 3
groups: bridge
priority 32768 hellotime 2 fwddelay 15 maxage 20 holdcnt 6 proto rstp
designated: id 00:00:00:00:00:00 priority 0
athn0 flags=3
port 6 ifpriority 0 ifcost 0
[bunch of `pass/block in/out on athn0 src/dst ' rules]
athn1 flags=3
port 7 ifpriority 0 ifcost 0
[bunch of `pass/block in/out on athn1 src/dst ' rules]
em0 flags=3
port 1 ifpriority 0 ifcost 0
em1 flags=3
port 2 ifpriority 0 ifcost 0
em2 flags=3
port 3 ifpriority 0 ifcost 0
em3 flags=3
port 4 ifpriority 0 ifcost 0
vether0 flags=3
port 13 ifpriority 0 ifcost 0
Addresses (max cache: 100, timeout: 240):
[...]
# ifconfig vether0
vether0: flags=8943 mtu 1500
lladdr fe:e1:ba:d0:58:44
description: Internal LAN
index 13 priority 0 llprio 3
groups: vether
media: Ethernet autoselect
status: active
inet 192.168.0.1 netmask 0x broadcast 192.168.255.255
inet6 <> prefixlen 64 scopeid 0xd
inet6 <> prefixlen 64 pltime 573642 vltime 573642
# ifconfig em
em0: flags=8b43 mtu
1500
lladdr
description: Internal LAN - Room1
index 1 priority 0 llprio 3
media: Ethernet autoselect (100baseTX full-duplex,rxpause,txpause)
status: active
em1: flags=8b43 mtu
1500
lladdr
description: Internal LAN - Room2
index 2 priority 0 llprio 3
media: Ethernet autoselect (1000baseT
full-duplex,master,rxpause,txpause)
status: active
em2: flags=8b43 mtu
1500
lladdr
description: Internal LAN - Room3
index 3 priority 0 llprio 3
media: Ethernet autoselect (100baseTX full-duplex,rxpause,txpause)
status: active
em3: flags=8902 mtu 1500
lladdr
index 4 priority 0 llprio 3
media: Ethernet autoselect (none)
status: no carrier
Nothing fancy, just basically a "software switch" for connecting
separate rooms in the house and adding a vether(4) interface for
conveniency.
Also, everything else remain unchanged, i.e.: no additional services
running, no new software has been installed, no introduction of new pf
rules, other than replacing the interface names of course.
I'm using /etc/malloc.conf@ -> S on all my machines but never had any
problems with it (and still don't anywhere else).
== pf(4)
pf(4) is used on the box, and the rules that have been changed are the
ones related to the interfaces mentioned above:
set skip on lo0
set skip on bridge0
pass on vether0 all flags S/SA allow-opts
pass on em0 all flags S/SA allow-opts
pass on em1 all flags S/SA allow-opts
pass on em2 all flags S/SA allow-opts
pass on em3 all
