> What network device driver, that is probably the problem? We are using Openwrt on our AP, and the driver is mvswitch.c its an marvell driver. If possible, can you point me to some piece of code in the driver to check for memory leak? Thanks Again, Sharad. -----Original Message----- From: Stephen Hemminger [mailto:shemminger@xxxxxxxxxx] Sent: Tuesday, April 14, 2009 1:05 AM To: Tekale Sharad-FHJN78 Cc: bridge@xxxxxxxxxxxxxxxxxxxxxxxxxx Subject: Re: Out of memory problem On Tue, 14 Apr 2009 13:21:13 +0800 "Tekale Sharad-FHJN78" <FHJN78@xxxxxxxxxxxx> wrote: > > > Hi Stephen > > Most likely, you have created a loop and are not running spanning > tree. When a loop happens, packets multiply until all > resources are > exhausted. > > > you have created a loop. > Ya, I have bridge named br-lan created by($brctl), and I have attached > two interfaces to it, and I'm sending traffic from PC1 to PC2. Some > thing like this > > ----------------------- > | ------------ | > | | br-lan | | <--- AP > | ------------ | > | eth0.0 eth0.1 | > ----|------------|----- > > | | > | | > PC1 PC2 > > Previously: > root@none:/$ brctl show > bridge name bridge id STP enabled interfaces > br-lan 8000.001570d8d8fd no eth0.0 > eth0.1 > > >are not running spanning tree. > Is it always necessary to enable spanning tree when traffic is sent > over loop? > > I have enabled spanning tree using > > root@none:/$ brctl stp br-lan on > root@none:/$ brctl show > bridge name bridge id STP enabled interfaces > br-lan 8000.001570d8d8fd yes eth0.0 > eth0.1 > > But again, when huge traffic is pumped from PC1 to PC2, The > skbuff_head_cache value is increased rapidly and even after stop > pumping the traffic, this value doesn't come down, and system goes for > crash or reboot because of out of memory. > > root@none:/$ cat /proc/slabinfo | grep skbuff_head > skbuff_head_cache 4560 4560 192 20 1 : tunables 120 60 > 0 : slabdata 228 228 0 > > One more point, say I have each port attached to there own bridge, and > when I route traffic from one host to other, I'll not face this > behavior, This behavior is relevant only in above case. > > Do I have to do any other setting to overcome out of memory problem? > Also, Please let me know if any other information is required to > isolate this behavior. What network device driver, that is probably the problem? _______________________________________________ Bridge mailing list Bridge@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/bridge
