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Date: Mon, 23 Jun 2014 19:47:59 -0400 From: Dave Jones <davej@...hat.com> To: David Miller <davem@...emloft.net>, torvalds@...ux-foundation.org, akpm@...ux-foundation.org, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, therbert@...gle.com Subject: Re: [GIT] Networking On Mon, Jun 16, 2014 at 07:42:54PM -0400, Dave Jones wrote: > On Mon, Jun 16, 2014 at 07:04:50PM -0400, Dave Jones wrote: > > On Sun, Jun 15, 2014 at 07:33:12PM -0700, David Miller wrote: > > > > > 1) Fix checksumming regressions, from Tom Herbert. > > > > Something still not right for me here. > > After about 5 minutes, I get an oops and then instant reboot/lock up. > > > > I haven't managed to get a trace over usb-serial because it seems to > > crash before it completes. Hand transcribed one looks like.. > > > > rbp: ffff880236403970 r08: 0000000000000000 r09: 0000000000000000 > > r10: 000000000000005a r11: 00000000000002d7 f12: ffff880233000d80 > > r13: ffff8800aa1a6fc2 r14: ffff880233001d40 f15: 00000000ffffac82 > > fs: 0 fs: ffff880236400000 knlGS: 0 > > CS: 10 DS: 0 ES: 0 CR0: 80050033 > > CR2: ffff8800aa1a8000 CR3: 1a0d000 CR4: 407f0 > > Stack: > > ffff880236403988 ffffffff81298bbc 00000000000016c0 ffff8802364039e8 > > ffffffff814ca05a ffff880233001d40 000005a80000e397 ffff880233001680 > > 0000000000000000 0d420685ffffac82 000000000000012a 000000000000004e > > Call Trace: > > <IRQ> > > csum_partial > > tcp_gso_segment > > inet_gso_segment > > ? update_dl_migration > > skb_mac_gso_segment > > __skb_gso_segment > > dev_hard_start_xmit > > sch_direct_xmit > > __dev_queue_xmit > > ? dev_hard_start_xmit > > dev_queue_xmit > > ip_finish_output > > ? ip_output > > ip_output > > ip_forward_finish > > ip_forward > > ip_rcv_finish > > ip_rcv > > __netif_receive_skb_core > > ? __netif_receive_skb_core > > ? trace_hardirqs_on > > __netif_receive_skb > > netif_receive_skb_internal > > napi_gro_complete > > ? napi_gro_complete > > dev_gro_receive > > ? dev_gro_receive > > napi_gro_receive > > rtl8169_poll > > net_rx_action > > __do_softirq > > irq_exit > > do_IRQ > > common_interrupt > > <EOI> > > cpuidle_enter_state > > cpuidle_enter > > cpu_startup_entry > > rest_init > > ? csum_partial_copy_generic > > start_kernel > > RIP: do_csum+0x83/0x180 > > > > Code: 41 89 d2 74 45 89 d1 45 31 c0 48 89 fa 0f 1f 00 48 03 02 48 13 42 > > 08 48 13 42 10 48 13 42 20 48 13 42 28 48 13 42 30 <48> 13 42 38 4c 11 > > c0 48 83 c2 40 83 e9 01 75 d5 41 83 ea 01 49 > > > > All code > > ======== > > 0: 41 89 d2 mov %edx,%r10d > > 3: 74 45 je 0x4a > > 5: 89 d1 mov %edx,%ecx > > 7: 45 31 c0 xor %r8d,%r8d > > a: 48 89 fa mov %rdi,%rdx > > d: 0f 1f 00 nopl (%rax) > > 10: 48 03 02 add (%rdx),%rax > > 13: 48 13 42 08 adc 0x8(%rdx),%rax > > 17: 48 13 42 10 adc 0x10(%rdx),%rax > > 1b: 48 13 42 20 adc 0x20(%rdx),%rax > > 1f: 48 13 42 28 adc 0x28(%rdx),%rax > > 23: 48 13 42 30 adc 0x30(%rdx),%rax > > 27:* 48 13 42 38 adc 0x38(%rdx),%rax <-- trapping instruction > > 2b: 4c 11 c0 adc %r8,%rax > > 2e: 48 83 c2 40 add $0x40,%rdx > > 32: 83 e9 01 sub $0x1,%ecx > > 35: 75 d5 jne 0xc > > 37: 41 83 ea 01 sub $0x1,%r10d > > 3b: 49 rex.WB > > > > Typical, rdx and rax had scrolled off the screen. > > after removing the dump_stack invocations, I noticed that the reason > this is rebooting is probably because right after the initial oops > we hit the WARN_ON at arch/x86/kernel/smp.c:124 > > if (unlikely(cpu_is_offline(cpu))) { > WARN_ON(1); > return; > } > > lol. > > Anwyay, before all that nonsense, I now have the top of the oops.. > > BUG: unable to handle kernel paging request at ffff880218c18000 > IP: do_csum+0x68 > PGD: 2c6a067 PUD: 2c6d067 PMD 23fd1c067 PTE: 80000000218c18060 > RAX: 2090539bbf7b28f2 RBX: 00000000acb23d4e RCX: 000000000000000b > RDX: ffff880218c18000 RSI: 0000000000001c62 RDI: ffff880218c16680 > > Maybe also notable here is that the kernel is built with DEBUG_PAGEALLOC on. This is still a problem in -rc2. Lasts about 5 minutes, then reboots. Dave -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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