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Message-ID: <20140211233307.GA10472@redhat.com> Date: Tue, 11 Feb 2014 18:33:07 -0500 From: Dave Jones <davej@...hat.com> To: Francois Romieu <romieu@...zoreil.com> Cc: netdev@...r.kernel.org, dan.j.williams@...el.com Subject: Re: r8169: DMA-API: exceeded 7 overlapping mappings of pfn 943ad On Thu, Jan 30, 2014 at 10:08:02PM +0100, Francois Romieu wrote: > Dave Jones <davej@...hat.com> : > > WARNING: CPU: 0 PID: 0 at lib/dma-debug.c:491 add_dma_entry+0x127/0x130() > > DMA-API: exceeded 7 overlapping mappings of pfn 943ad > > Modules linked in: ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat xt_LOG xt_limit ip6t_REJECT nf_conntrack_ipv4 nf_conntrack_ipv6 nf_defrag_ipv6 nf_defrag_ipv4 xt_conntrack nf_conntrack ip6table_filter ip6_tables crc32c_intel ghash_clmulni_intel microcode pcspkr r8169 mii nfsd auth_rpcgss nfs_acl lockd sunrpc i915 i2c_algo_bit drm_kms_helper drm video backlight > > CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.13.0+ #10 > > Was 59f2e7df574c78e952d79435de3f4867349403aa included in the run ? fyi, still seeing this in .14rc2. It happens shortly after boot, and seems quite reproducable for me.. /var/log/messages-20140202:Jan 30 10:48:08 firewall kernel: [30254.316836] WARNING: CPU: 0 PID: 0 at lib/dma-debug.c:491 add_dma_entry+0x127/0x130() /var/log/messages-20140202:Jan 31 10:42:09 firewall kernel: [ 2333.196185] WARNING: CPU: 0 PID: 0 at lib/dma-debug.c:491 add_dma_entry+0x127/0x130() /var/log/messages-20140202:Feb 2 01:40:26 firewall kernel: [ 164.305284] WARNING: CPU: 0 PID: 0 at lib/dma-debug.c:491 add_dma_entry+0x127/0x130() /var/log/messages-20140209:Feb 7 17:26:06 firewall kernel: [ 422.596431] WARNING: CPU: 0 PID: 0 at lib/dma-debug.c:491 add_dma_entry+0x127/0x130() As the hostname suggests, this box is forwarding packets between two 8169s. (Added Dan to cc in case this is another dma-debug regression, full trace below for his benefit) Dave [ 676.433089] WARNING: CPU: 0 PID: 0 at lib/dma-debug.c:491 add_dma_entry+0x127/0x130() [ 676.433177] DMA-API: exceeded 7 overlapping mappings of pfn 84 [ 676.433243] Modules linked in: ipt_MASQUERADE iptable_nat nf_nat_ipv4 nf_nat xt_LOG xt_limit ip6t_REJECT nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_filter nf_conntrack_ipv4 ip6_tables nf_defrag_ipv4 xt_conntrack nf_conntrack crc32c_intel ghash_clmulni_intel microcode pcspkr r8169 mii nfsd auth_rpcgss nfs_acl lockd sunrpc i915 i2c_algo_bit drm_kms_helper drm video backlight [ 676.433729] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 3.14.0-rc2+ #17 [ 676.433842] Hardware name: Shuttle Inc. SH87R/FH87, BIOS 1.02 06/26/2013 [ 676.433917] 0000000000000009 a926658692479a32 ffff88013ac03910 ffffffff8157b0d8 [ 676.434015] ffff88013ac03958 ffff88013ac03948 ffffffff8105c313 0000000000000084 [ 676.434110] ffff8800b190bc70 0000000000000286 ffffffff828a0180 0000000000000286 [ 676.434205] Call Trace: [ 676.434234] <IRQ> [<ffffffff8157b0d8>] dump_stack+0x4d/0x66 [ 676.434320] [<ffffffff8105c313>] warn_slowpath_common+0x73/0x90 [ 676.434391] [<ffffffff8105c387>] warn_slowpath_fmt+0x57/0x80 [ 676.434460] [<ffffffff812c029d>] ? active_pfn_read_overlap+0x2d/0x50 [ 676.434535] [<ffffffff812c0867>] add_dma_entry+0x127/0x130 [ 676.434601] [<ffffffff812c0b9a>] debug_dma_map_page+0x11a/0x140 [ 676.434679] [<ffffffffa01ebaae>] rtl8169_start_xmit+0x1fe/0xac0 [r8169] [ 676.434761] [<ffffffff810a81af>] ? lock_release_holdtime.part.30+0xf/0x190 [ 676.439701] [<ffffffff8146c3b0>] ? dev_queue_xmit_nit+0x170/0x3d0 [ 676.444647] [<ffffffff8146e65b>] dev_hard_start_xmit+0x2cb/0x4c0 [ 676.449593] [<ffffffff8148f39e>] sch_direct_xmit+0xee/0x280 [ 676.454537] [<ffffffff8146ea50>] __dev_queue_xmit+0x200/0x770 [ 676.459320] [<ffffffff8146e850>] ? dev_hard_start_xmit+0x4c0/0x4c0 [ 676.463946] [<ffffffff8146efcb>] dev_queue_xmit+0xb/0x10 [ 676.468409] [<ffffffff8147a0ea>] neigh_resolve_output+0x17a/0x2e0 [ 676.472827] [<ffffffff814a97b0>] ? ip_finish_output+0x3f0/0x8e0 [ 676.477191] [<ffffffff814a97b0>] ip_finish_output+0x3f0/0x8e0 [ 676.481493] [<ffffffff814a9626>] ? ip_finish_output+0x266/0x8e0 [ 676.485744] [<ffffffff814ab3e7>] ip_output+0x57/0xf0 [ 676.489926] [<ffffffff814a60e1>] ip_forward_finish+0x71/0x1c0 [ 676.494055] [<ffffffff814a6443>] ip_forward+0x213/0x590 [ 676.498113] [<ffffffff814a3ff0>] ip_rcv_finish+0x140/0x570 [ 676.502112] [<ffffffff814a4974>] ip_rcv+0x294/0x3d0 [ 676.506040] [<ffffffff8146ba62>] __netif_receive_skb_core+0x762/0x960 [ 676.509937] [<ffffffff8146b43d>] ? __netif_receive_skb_core+0x13d/0x960 [ 676.513783] [<ffffffff810aad3d>] ? trace_hardirqs_on+0xd/0x10 [ 676.517570] [<ffffffff8146bc73>] __netif_receive_skb+0x13/0x60 [ 676.521299] [<ffffffff8146bced>] netif_receive_skb_internal+0x2d/0x210 [ 676.524981] [<ffffffff8146da28>] napi_gro_receive+0x58/0x80 [ 676.528606] [<ffffffffa01ec4d6>] rtl8169_poll+0x166/0x700 [r8169] [ 676.532180] [<ffffffff8146c7f9>] net_rx_action+0x129/0x1e0 [ 676.535694] [<ffffffff81060e8c>] __do_softirq+0x11c/0x2a0 [ 676.539229] [<ffffffff8106134d>] irq_exit+0x11d/0x140 [ 676.542699] [<ffffffff810043e3>] do_IRQ+0x53/0xf0 [ 676.546183] [<ffffffff81583def>] common_interrupt+0x6f/0x6f [ 676.549692] <EOI> [<ffffffff8142d31f>] ? cpuidle_enter_state+0x4f/0xc0 [ 676.553275] [<ffffffff8142d31b>] ? cpuidle_enter_state+0x4b/0xc0 [ 676.556803] [<ffffffff8142d426>] cpuidle_idle_call+0x96/0x140 [ 676.560276] [<ffffffff8100b949>] arch_cpu_idle+0x9/0x30 [ 676.563769] [<ffffffff810b504a>] cpu_startup_entry+0xea/0x220 [ 676.567211] [<ffffffff81572a43>] rest_init+0x133/0x140 [ 676.570589] [<ffffffff81572910>] ? csum_partial_copy_generic+0x170/0x170 [ 676.574017] [<ffffffff81c78e6c>] start_kernel+0x41f/0x440 [ 676.577382] [<ffffffff81c78856>] ? repair_env_string+0x5c/0x5c [ 676.580692] [<ffffffff81c78571>] x86_64_start_reservations+0x2a/0x2c [ 676.584036] [<ffffffff81c7863a>] x86_64_start_kernel+0xc7/0xca [ 676.587390] ---[ end trace 6c6ab4309da33850 ]--- -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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