Hello, I am trying to use the RT patches on an x86 industrial computer. I am getting intermittent network hangs and kernel crashes when I load the network with netperf. The unpatched kernel does not exhibit these problems. The kernel is 2.6.33.6 patched with rt28. The computer has an AMD LX800 processor and two Intel 82559 10/100 PCI Ethernet controllers. I have only seen the kernel crashes when running netperf on both ports simultaneously. This is my first time using the RT patches, so I am not sure how to go about resolving this. Any tips would be greatly appreciated. [ 201.514962] BUG: unable to handle kernel paging request at a0282044 [ 201.516020] IP: [<c108d664>] free_block+0x4f/0xe5 [ 201.516020] *pde = 00000000 [ 201.516020] Oops: 0002 [#1] PREEMPT [ 201.516020] last sysfs file: /sys/module/vt/parameters/default_utf8 [ 201.516020] Modules linked in: evdev usbhid ohci_hcd geode_rng ecb aes_i586 ehci_hcd aes_generic usbcore geode_aes nls_base [ 201.516020] [ 201.516020] Pid: 6, comm: sirq-net-rx/0 Tainted: G W 2.6.33.6-rt28 #4 SL8/SL8 [ 201.516020] EIP: 0060:[<c108d664>] EFLAGS: 00010202 CPU: 0 [ 201.516020] EIP is at free_block+0x4f/0xe5 [ 201.516020] EAX: d6d75060 EBX: de682500 ECX: 00000004 EDX: a0282040 [ 201.516020] ESI: de682020 EDI: de431340 EBP: de40e5c0 ESP: de44bd74 [ 201.516020] DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068 preempt:00000000 [ 201.516020] Process sirq-net-rx/0 (pid: 6, ti=de44a000 task=de420490 task.ti=de44a000) [ 201.516020] Stack: [ 201.516020] 00000003 00000000 0000001b de406688 00000001 de431340 00000000 de406660 [ 201.516020] <0> 0000001b c108d835 00000000 de44bdc8 de44bdc8 ddbd2060 de40e5c0 de431364 [ 201.516020] <0> 00000000 de40e5c0 ddbd2060 ddbd2060 c108d581 00000000 00000000 d6e78620 [ 201.516020] Call Trace: [ 201.516020] [<c108d835>] ? __cache_free+0x7a/0xae [ 201.516020] [<c108d581>] ? kmem_cache_free+0x1c/0x58 [ 201.516020] [<c11d3493>] ? tcp_ack+0x3eb/0x12f5 [ 201.516020] [<c11d4bd8>] ? tcp_rcv_established+0xb0/0x476 [ 201.516020] [<c11da92f>] ? tcp_v4_do_rcv+0x129/0x28f [ 201.516020] [<c11dbf43>] ? tcp_v4_rcv+0x339/0x523 [ 201.516020] [<c11c3a8a>] ? ip_local_deliver_finish+0xf9/0x160 [ 201.516020] [<c11c3925>] ? ip_rcv_finish+0x28a/0x29d [ 201.516020] [<c11aceb4>] ? netif_receive_skb+0x1c2/0x1e9 [ 201.516020] [<c118d368>] ? e100_poll+0x172/0x37c [ 201.516020] [<c11af94c>] ? net_rx_action+0x53/0x100 [ 201.516020] [<c1027743>] ? run_ksoftirqd+0xfb/0x1da [ 201.516020] [<c1027648>] ? run_ksoftirqd+0x0/0x1da [ 201.516020] [<c1036d2d>] ? kthread+0x52/0x57 [ 201.516020] [<c1036cdb>] ? kthread+0x0/0x57 [ 201.516020] [<c1002dbe>] ? kernel_thread_helper+0x6/0x10 [ 201.516020] Code: 24 0c 8b 1c 82 89 d8 e8 34 fc ff ff 89 c6 e8 18 f9 ff ff 85 c0 75 04 0f 0b eb fe 8b 76 1c 8b 44 24 28 8b 16 8b 7c 85 4c 8b 46 04 <89> 42 04 89 10 2b 5e 0c c7 06 00 01 10 00 c7 46 04 00 02 20 00 [ 201.516020] EIP: [<c108d664>] free_block+0x4f/0xe5 SS:ESP 0068:de44bd74 [ 201.516020] CR2: 00000000a0282044 [ 201.908587] ---[ end trace d28d8d35cd5a7130 ]--- [ 201.920053] ------------[ cut here ]------------ [ 201.924018] kernel BUG at kernel/rtmutex.c:831! [ 201.924018] invalid opcode: 0000 [#2] PREEMPT [ 201.924018] last sysfs file: /sys/module/vt/parameters/default_utf8 [ 201.924018] Modules linked in: evdev usbhid ohci_hcd geode_rng ecb aes_i586 ehci_hcd aes_generic usbcore geode_aes nls_base [ 201.924018] [ 201.924018] Pid: 6, comm: sirq-net-rx/0 Tainted: G D W 2.6.33.6-rt28 #4 SL8/SL8 [ 201.924018] EIP: 0060:[<c122ca6e>] EFLAGS: 00010046 CPU: 0 [ 201.924018] EIP is at rt_spin_lock_slowlock+0x35/0x155 [ 201.924018] EAX: de420490 EBX: 00000292 ECX: 00000000 EDX: de420490 [ 201.924018] ESI: c122ca39 EDI: c1321160 EBP: 00000000 ESP: de44bba8 [ 201.924018] DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068 preempt:00000001 [ 201.924018] Process sirq-net-rx/0 (pid: 6, ti=de44a000 task=de420490 task.ti=de44a000) [ 201.924018] Stack: [ 201.924018] 00000030 00000046 de44bbd0 c102784a c1003c19 de120c7c de226b3c de40a600 [ 201.924018] <0> 00000000 c1002db0 de120c7c 00000000 c1322c40 de226b3c c1321160 c122ca39 [ 201.924018] <0> de120c64 00000000 c104582b de44bc08 de40e7a0 c108d08a de120c7c c108d576 [ 201.924018] Call Trace: [ 201.924018] [<c102784a>] ? irq_exit+0x28/0x32 [ 201.924018] [<c1003c19>] ? do_IRQ+0x61/0x71 [ 201.924018] [<c1002db0>] ? common_interrupt+0x30/0x38 [ 201.924018] [<c122ca39>] ? rt_spin_lock_slowlock+0x0/0x155 [ 201.924018] [<c104582b>] ? rt_spin_lock_fastlock+0x52/0x55 [ 201.924018] [<c108d08a>] ? _slab_irq_disable+0xd/0x15 [ 201.924018] [<c108d576>] ? kmem_cache_free+0x11/0x58 [ 201.924018] [<c109f603>] ? destroy_inode+0x1c/0x2b [ 201.924018] [<c109eefe>] ? iput+0x47/0x49 [ 201.924018] [<c109cfd1>] ? d_kill+0x2d/0x47 [ 201.924018] [<c109d195>] ? __shrink_dcache_sb+0x1aa/0x247 [ 201.924018] [<c109d4c0>] ? shrink_dcache_parent+0x26/0xd7 [ 201.924018] [<c10c59f9>] ? proc_flush_task+0x7d/0x165 [ 201.924018] [<c1024445>] ? release_task+0x18/0x2af [ 201.924018] [<c102570c>] ? do_exit+0x4dd/0x547 [ 201.924018] [<c1004d16>] ? oops_end+0x7f/0x83 [ 201.924018] [<c1015165>] ? no_context+0x10c/0x115 [ 201.924018] [<c10153ad>] ? do_page_fault+0x0/0x28f [ 201.924018] [<c1015361>] ? bad_area_nosemaphore+0xa/0xc [ 201.924018] [<c122d2fb>] ? error_code+0x6b/0x70 [ 201.924018] [<c108d664>] ? free_block+0x4f/0xe5 [ 201.924018] [<c108d835>] ? __cache_free+0x7a/0xae [ 201.924018] [<c108d581>] ? kmem_cache_free+0x1c/0x58 [ 201.924018] [<c11d3493>] ? tcp_ack+0x3eb/0x12f5 [ 201.924018] [<c11d4bd8>] ? tcp_rcv_established+0xb0/0x476 [ 201.924018] [<c11da92f>] ? tcp_v4_do_rcv+0x129/0x28f [ 201.924018] [<c11dbf43>] ? tcp_v4_rcv+0x339/0x523 [ 201.924018] [<c11c3a8a>] ? ip_local_deliver_finish+0xf9/0x160 [ 201.924018] [<c11c3925>] ? ip_rcv_finish+0x28a/0x29d [ 201.924018] [<c11aceb4>] ? netif_receive_skb+0x1c2/0x1e9 [ 201.924018] [<c118d368>] ? e100_poll+0x172/0x37c [ 201.924018] [<c11af94c>] ? net_rx_action+0x53/0x100 [ 201.924018] [<c1027743>] ? run_ksoftirqd+0xfb/0x1da [ 201.924018] [<c1027648>] ? run_ksoftirqd+0x0/0x1da [ 201.924018] [<c1036d2d>] ? kthread+0x52/0x57 [ 201.924018] [<c1036cdb>] ? kthread+0x0/0x57 [ 201.924018] [<c1002dbe>] ? kernel_thread_helper+0x6/0x10 [ 201.924018] Code: 44 24 2c 00 00 00 00 9c 5b fa b8 01 00 00 00 e8 8d f5 de ff 89 f8 e8 fd 83 e1 ff 8b 47 10 8b 15 d8 02 31 c1 83 e0 fc 39 d0 75 04 <0f> 0b eb fe 8b 02 e8 e0 82 e1 ff 89 c5 8b 35 d8 02 31 c1 8b 46 [ 201.924018] EIP: [<c122ca6e>] rt_spin_lock_slowlock+0x35/0x155 SS:ESP 0068:de44bba8 [ 201.924018] ---[ end trace d28d8d35cd5a7131 ]--- [ 201.924018] Fixing recursive fault but reboot is needed! [ 202.672902] sched: RT throttling activated -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
