Perhaps the bug below has already been resolved in the latest release, but I came across this when creating 32 PPP sessions with a 1Mbps client sending/receiving UDP over each of the PPP session. Hope this is of some help, Dave Craig QUALCOMM Incorporated ------------[ cut here ]------------ kernel BUG at net/core/dev.c:3030! invalid operand: 0000 [#1] PREEMPT SMP CPU: 1 EIP: 0060:[<c0247865>] Not tainted EFLAGS: 00010297 (2.6.5) EIP is at free_netdev+0x2d/0x46 eax: f1c8e400 ebx: f10da000 ecx: c035d0c0 edx: 00000003 esi: f7536800 edi: f1c8e400 ebp: f10dbf2c esp: f10dbf2c ds: 007b es: 007b ss: 0068 Process pppd (pid: 10310, threadinfo=f10da000 task=f6ec46b0) Stack: f10dbf4c f887f337 f1c8e400 f5078480 f7e797c0 f7536800 00000000 f7e797c0 f10dbf5c f887b098 f7536800 f6cdac80 f10dbf80 c015bf8c f34c9d94 f6cdac80 f34c9d94 f5078480 f6cdac80 00000000 f72f3a80 f10dbf9c c015a63a f6cdac80 Call Trace: [<f887f337>] ppp_shutdown_interface+0xa1/0x107 [ppp_generic] [<f887b098>] ppp_release+0x66/0x68 [ppp_generic] [<c015bf8c>] __fput+0x129/0x13b [<c015a63a>] filp_close+0x57/0x81 [<c015a6e5>] sys_close+0x81/0xc7 [<c0109059>] sysenter_past_esp+0x52/0x71 Code: 0f 0b d6 0b 45 cc 32 c0 eb de 2b 80 0c 02 00 00 89 45 08 5d <6>tg3: eth0: Link is up at 100 Mbps, full duplex. tg3: eth0: Flow control is off for TX and off for RX. eth0: no IPv6 routers present - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html