Hi all, My problem is kernel crash under full line rate random packet length ip network traffic. I'am using default unmodified kernel and default SMP kernel configuration, MPC8572DS development board and also using a hardware packet generator. My test is ip forwarding between eth0 and eth1, and Hardware packet generator produces full duplex, full line rate traffic with random packet length and random payload . After a few millions of packets passed, kernel produces this bellow two different crash messages . I have retry this scenario many times, crash occurs sometimes on skb_put, but mostly occurs on ip_rcv function. I have aplied same test to latest stable linux 2.6.35.6 kernel. Same errors produced.
Any comment and help are appreciated. Here is crash logs: Thanks. Emin First type of crash: r...@mpc8572ds:~# skb_over_panic: text:c0226280 len:1171 put:1171 head:eed6d000 data:eed63040 tail:0xeed6d4d3 end:0xeed63660 dev:<NULL> ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:127! Oops: Exception in kernel mode, sig: 5 [#1] SMP NR_CPUS=2 MPC8572 DS last sysfs file: /sys/devices/pci0002:03/0002:03:00.0/subsystem_device Modules linked in: NIP: c023bdcc LR: c023bdcc CTR: c01f3ff8 REGS: effe7d70 TRAP: 0700 Not tainted (2.6.36-rc5) MSR: 00029000 <EE,ME,CE> CR: 22028024 XER: 20000000 TASK = ef83e9a0[9] 'ksoftirqd/1' THREAD: ef856000 CPU: 1 GPR00: c023bdcc effe7e20 ef83e9a0 0000007c 00021000 ffffffff c01f7b98 c03ccf1c GPR08: c03c69d4 c03f94b4 00c4e000 00000004 20028048 1001a108 ef211000 efb52d90 GPR16: efb52e38 efb52870 00000000 ef211800 00000008 00000009 efb52800 00000037 GPR24: ef24e180 ef2be040 00000000 ef211948 efb52b80 00000493 ef015940 ef386600 NIP [c023bdcc] skb_put+0x8c/0x94 LR [c023bdcc] skb_put+0x8c/0x94 Call Trace: [effe7e20] [c023bdcc] skb_put+0x8c/0x94 (unreliable) [effe7e30] [c0226280] gfar_clean_rx_ring+0x104/0x4b8 [effe7e90] [c02269dc] gfar_poll+0x3a8/0x60c [effe7f60] [c024928c] net_rx_action+0xf8/0x1a4 [effe7fa0] [c0042524] __do_softirq+0xe0/0x178 [effe7ff0] [c000e59c] call_do_softirq+0x14/0x24 [ef857f50] [c0004840] do_softirq+0x90/0xa0 [ef857f70] [c00430e4] run_ksoftirqd+0xb4/0x164 [ef857fb0] [c00586b4] kthread+0x7c/0x80 [ef857ff0] [c000e9a8] kernel_thread+0x4c/0x68 Instruction dump: 81030098 2f800000 409e000c 3d20c037 3809a19c 3c60c037 7c8802a6 7d695b78 3863b010 90010008 4cc63182 4be016c5 <0fe00000> 48000000 9421fff0 7c0802a6 Kernel panic - not syncing: Fatal exception in interrupt --------------- second type of crash: Faulting instruction address: 0xc026c1dc Oops: Kernel access of bad area, sig: 11 [#1] SMP NR_CPUS=2 MPC8572 DS last sysfs file: /sys/devices/pci0002:03/0002:03:00.0/subsystem_device Modules linked in: NIP: c026c1dc LR: c026bfac CTR: 00000000 REGS: effebd00 TRAP: 0300 Not tainted (2.6.36-rc5) MSR: 00029000 <EE,ME,CE> CR: 42028042 XER: 00000000 DEAR: 0000cad8, ESR: 00000000 TASK = ef83cde0[3] 'ksoftirqd/0' THREAD: ef84a000 CPU: 0 GPR00: 00000005 effebdb0 ef83cde0 00000000 000001b9 00000000 c1008060 00000000 GPR08: 02c3f605 0000ca00 000005b9 0000ca00 b653a6c7 7af823f0 ef217000 efbab590 GPR16: efbab638 efbab070 00000000 ef217800 00000008 00000018 efbab000 00000028 GPR24: c03f971c c0410000 c0400000 c03f94b4 effea000 ef316e40 00000000 eecb685e NIP [c026c1dc] ip_rcv+0x3f8/0x808 LR [c026bfac] ip_rcv+0x1c8/0x808 Call Trace: [effebdb0] [c026c204] ip_rcv+0x420/0x808 (unreliable) [effebde0] [c02482dc] __netif_receive_skb+0x2f8/0x324 [effebe10] [c02483a4] netif_receive_skb+0x9c/0xb0 [effebe30] [c0226308] gfar_clean_rx_ring+0x18c/0x4b8 [effebe90] [c02269dc] gfar_poll+0x3a8/0x60c [effebf60] [c024928c] net_rx_action+0xf8/0x1a4 [effebfa0] [c0042524] __do_softirq+0xe0/0x178 [effebff0] [c000e59c] call_do_softirq+0x14/0x24 [ef84bf50] [c0004840] do_softirq+0x90/0xa0 [ef84bf70] [c00430e4] run_ksoftirqd+0xb4/0x164 [ef84bfb0] [c00586b4] kthread+0x7c/0x80 [ef84bff0] [c000e9a8] kernel_thread+0x4c/0x68 Instruction dump: 8148003c 318a0001 7d690194 91680038 9188003c 4bfffd78 7fa3eb78 48002a29 2f830000 40beff50 817d0048 5569003c <a00900d8> 2f800005 419e0034 2f800003 Kernel panic - not syncing: Fatal exception in interrupt _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
