From mboxrd@z Thu Jan 1 00:00:00 1970 From: Sachin Sant Subject: [2.6.30-git21] Network Namespace test failure Date: Wed, 24 Jun 2009 19:20:22 +0530 Message-ID: <4A422F1E.3050208@in.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: serue@linux.vnet.ibm.com, David Miller , matthltc@us.ibm.com To: netdev Return-path: Received: from e23smtp06.au.ibm.com ([202.81.31.148]:53904 "EHLO e23smtp06.au.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752725AbZFXNuf (ORCPT ); Wed, 24 Jun 2009 09:50:35 -0400 Received: from d23relay01.au.ibm.com (d23relay01.au.ibm.com [202.81.31.243]) by e23smtp06.au.ibm.com (8.13.1/8.13.1) with ESMTP id n5ODoSlY006643 for ; Wed, 24 Jun 2009 23:50:28 +1000 Received: from d23av02.au.ibm.com (d23av02.au.ibm.com [9.190.235.138]) by d23relay01.au.ibm.com (8.13.8/8.13.8/NCO v9.2) with ESMTP id n5ODoavX565376 for ; Wed, 24 Jun 2009 23:50:36 +1000 Received: from d23av02.au.ibm.com (loopback [127.0.0.1]) by d23av02.au.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id n5ODoaDI016736 for ; Wed, 24 Jun 2009 23:50:36 +1000 Sender: netdev-owner@vger.kernel.org List-ID: While executing Newtork namespace tests from LTP[1] May release, the machine crashed with following o/p. This is a PowerPC blade(Power 6) cpu 0x1: Vector: 300 (Data Access) at [c00000000fff7310] pc: d0000000021c09dc: .veth_xmit+0x90/0x26c [veth] lr: d0000000021c09ac: .veth_xmit+0x60/0x26c [veth] sp: c00000000fff7590 msr: 8000000000009032 dar: 7 dsisr: 40000000 current = 0xc00000004045bc80 paca = 0xc000000000ff2600 pid = 0, comm = swapper enter ? for help [c00000000fff7640] c00000000051b2b4 .dev_hard_start_xmit+0x2c4/0x3d8 [c00000000fff7710] c000000000539288 .__qdisc_run+0x184/0x330 [c00000000fff7800] c00000000051b894 .dev_queue_xmit+0x31c/0x4d4 [c00000000fff78a0] c0000000005249e8 .neigh_resolve_output+0x394/0x408 [c00000000fff7970] d0000000020c3168 .ip6_output_finish+0xd8/0x16c [ipv6] [c00000000fff7a20] d0000000020c5f60 .ip6_output2+0x2b8/0x2e0 [ipv6] [c00000000fff7ac0] d0000000020c6d60 .ip6_output+0xdd8/0xe38 [ipv6] [c00000000fff7bd0] d0000000020e8af4 .mld_sendpack+0x388/0x590 [ipv6] [c00000000fff7ce0] d0000000020e9f24 .mld_ifc_timer_expire+0x300/0x378 [ipv6] [c00000000fff7db0] c0000000000abca0 .run_timer_softirq+0x200/0x2e0 [c00000000fff7eb0] c0000000000a47e4 .__do_softirq+0x15c/0x298 [c00000000fff7f90] c000000000030bb4 .call_do_softirq+0x14/0x24 [c00000007e4338f0] c00000000000e5d8 .do_softirq+0x98/0xe4 [c00000007e433990] c0000000000a4460 .irq_exit+0x64/0xc4 [c00000007e433a10] c00000000002d278 .timer_interrupt+0xe4/0x114 [c00000007e433aa0] c000000000003718 decrementer_common+0x118/0x180 --- Exception: 901 (Decrementer) at c00000000000e528 .raw_local_irq_restore+0x74/0x8c [c00000007e433e20] c0000000000144e8 .cpu_idle+0x118/0x1bc [c00000007e433ec0] c0000000005cff14 .start_secondary+0x384/0x3c8 [c00000007e433f90] c0000000000082d4 .start_secondary_prolog+0x10/0x14 1:mon> r R00 = 0000000000001003 R16 = c000000000f91200 R01 = c00000000fff7590 R17 = 0000000000000000 R02 = d0000000021cace8 R18 = ffffffffffffffff R03 = c00000003f4e5780 R19 = 0000000000000000 R04 = c00000003eb84a80 R20 = c00000003d2bd39c R05 = c00000003d438580 R21 = c00000000fff4080 R06 = c0000000374a35c4 R22 = 0000000100009dea R07 = c000000037336f80 R23 = d0000000021c25f0 R08 = 0000000000000000 R24 = c00000003d438580 R09 = 3fffffffc8e93a7f R25 = c00000003eb88a80 R10 = ffffffffffffffff R26 = c00000003eb85080 R11 = 0000000000000008 R27 = c00000003ecd3780 R12 = d0000000020ffa30 R28 = c00000003d438580 R13 = c000000000ff2600 R29 = c00000003ecd3780 R14 = 0000000000000000 R30 = c000000000e97a40 R15 = 000000000767e1e8 R31 = c00000000fff7590 pc = d0000000021c09dc .veth_xmit+0x90/0x26c [veth] lr = d0000000021c09ac .veth_xmit+0x60/0x26c [veth] msr = 8000000000009032 cr = 24000044 ctr = c000000000506dc0 xer = 0000000020000001 trap = 300 dar = 0000000000000007 dsisr = 40000000 1:mon> 1:mon> di $.veth_xmit ... SNIP .... d0000000021c096c f821ff51 stdu r1,-176(r1) d0000000021c0970 7c3f0b78 mr r31,r1 d0000000021c0974 7c7d1b78 mr r29,r3 d0000000021c0978 7c992378 mr r25,r4 d0000000021c097c 48000008 b d0000000021c0984 # .veth_xmit+0x38/0x26c [veth] d0000000021c0980 e8410028 ld r2,40(r1) d0000000021c0984 e93d0088 ld r9,136(r29) d0000000021c0988 2fa90000 cmpdi cr7,r9,0 1:mon> d0000000021c098c 419e0024 beq cr7,d0000000021c09b0 # .veth_xmit+0x64/0x26c [veth] d0000000021c0990 e8090000 ld r0,0(r9) d0000000021c0994 f8410028 std r2,40(r1) ....... SNIP ....... d0000000021c09d0 796b1f24 rldicr r11,r11,3,60 d0000000021c09d4 7d4a50f8 not r10,r10 d0000000021c09d8 e93a0008 ld r9,8(r26) d0000000021c09dc 7f8b502a ldx r28,r11,r10 ^^^^^^^ points to %PC The corresponding c code (veth_xmit) is: 9cc: 3b 44 06 00 addi r26,r4,1536 cpu = smp_processor_id(); stats = per_cpu_ptr(priv->stats, cpu); 9d0: 79 6b 1f 24 rldicr r11,r11,3,60 9d4: 7d 4a 50 f8 not r10,r10 rcv_stats = per_cpu_ptr(rcv_priv->stats, cpu); 9d8: e9 3a 00 08 ld r9,8(r26) priv = netdev_priv(dev); rcv = priv->peer; rcv_priv = netdev_priv(rcv); cpu = smp_processor_id(); stats = per_cpu_ptr(priv->stats, cpu); 9dc: 7f 8b 50 2a ldx r28,r11,r10 rcv_stats = per_cpu_ptr(rcv_priv->stats, cpu); ^^^^^ PC points to this instruction ^^^^^ I haven't tried these tests earlier so not sure if this is a new problem or not. Let me know if there is any other information you would like. Thanks -Sachin [1] -> http://downloads.sourceforge.net/ltp/ltp-full-20090531.tgz -- --------------------------------- Sachin Sant IBM Linux Technology Center India Systems and Technology Labs Bangalore, India ---------------------------------