kernel 3.2.27 on arm: WARNING: at mm/page_alloc.c:2109 __alloc_pages_nodemask+0x1d4/0x68c()

[David Madore <david+ml@madore.org>]

Dear all,

I hope this is the right place to send this sort of backtrace dump.

I'm getting the following sort of dumps (below) on a 3.2.27 kernel on
an arm/kirkwood (actually DreamPlug) machine that's used as a router.

I imagine it being somehow related to the fact that it operates a
network bridge (I imagine this because I have another identical
machine with exactly the same kernel and a very similar config but not
running a bridge, and the warning never pops up).

Is this worth investigating?  (I will, of course, provide the config
file and any other relevant data if the answer is "yes".)  Is this
potentially serious?  (I'm getting hard lockups on this machine which
I suspect are due to hardware and unrelated to this, but if someone
tells me it could be the cause, I'd be more than happy to believe it.)

[24711.204492] ------------[ cut here ]------------
[24711.209151] WARNING: at mm/page_alloc.c:2109 __alloc_pages_nodemask+0x1d4/0x68c()
[24711.216667] Modules linked in: 8021q ath9k_htc mac80211 ath9k_common ath9k_hw ath cfg80211 bnep rfcomm sit tunnel4 sch_ingress cls_fw cls_u32 sch_sfq sch_htb pppoe pppox ppp_generic slhc bridge stp llc ip6t_REJECT ip6table_filter ip6table_mangle xt_NOTRACK ip6table_raw ip6_tables nf_conntrack_ipv6 nf_defrag_ipv6 nf_nat_ftp nf_conntrack_ftp ipt_REJECT xt_conntrack iptable_filter ipt_MASQUERADE iptable_nat nf_nat xt_TCPMSS xt_tcpudp xt_mark iptable_mangle ip_tables x_tables nf_conntrack_ipv4 nf_conntrack nf_defrag_ipv4 orion_wdt ipv6 snd_usb_audio snd_pcm snd_page_alloc snd_hwdep snd_usbmidi_lib snd_seq_midi snd_seq_midi_event snd_rawmidi btmrvl_sdio btmrvl snd_seq snd_timer snd_seq_device snd bluetooth soundcore
[24711.280663] [<c000d728>] (unwind_backtrace+0x0/0xf0) from [<c0022f74>] (warn_slowpath_common+0x50/0x68)
[24711.290124] [<c0022f74>] (warn_slowpath_common+0x50/0x68) from [<c0022fa8>] (warn_slowpath_null+0x1c/0x24)
[24711.299845] [<c0022fa8>] (warn_slowpath_null+0x1c/0x24) from [<c009caec>] (__alloc_pages_nodemask+0x1d4/0x68c)
[24711.309914] [<c009caec>] (__alloc_pages_nodemask+0x1d4/0x68c) from [<c009cfb4>] (__get_free_pages+0x10/0x3c)
[24711.319805] [<c009cfb4>] (__get_free_pages+0x10/0x3c) from [<c00c9fd0>] (kmalloc_order_trace+0x24/0xdc)
[24711.329269] [<c00c9fd0>] (kmalloc_order_trace+0x24/0xdc) from [<c038d638>] (pskb_expand_head+0x68/0x298)
[24711.338901] [<c038d638>] (pskb_expand_head+0x68/0x298) from [<bf0dd3ec>] (ip6_forward+0x4d4/0x7bc [ipv6])
[24711.348638] [<bf0dd3ec>] (ip6_forward+0x4d4/0x7bc [ipv6]) from [<bf0dfebc>] (ipv6_rcv+0x2bc/0x3dc [ipv6])
[24711.358333] [<bf0dfebc>] (ipv6_rcv+0x2bc/0x3dc [ipv6]) from [<c0394870>] (__netif_receive_skb+0x544/0x66c)
[24711.368106] [<c0394870>] (__netif_receive_skb+0x544/0x66c) from [<bf1cd054>] (br_nf_pre_routing_finish_ipv6+0x10c/0x160 [bridge])
[24711.379899] [<bf1cd054>] (br_nf_pre_routing_finish_ipv6+0x10c/0x160 [bridge]) from [<bf1cdae8>] (br_nf_pre_routing+0x59c/0x67c [bridge])
[24711.392271] [<bf1cdae8>] (br_nf_pre_routing+0x59c/0x67c [bridge]) from [<c03bd2a4>] (nf_iterate+0x8c/0xb4)
[24711.401988] [<c03bd2a4>] (nf_iterate+0x8c/0xb4) from [<c03bd328>] (nf_hook_slow+0x5c/0x118)
[24711.410540] [<c03bd328>] (nf_hook_slow+0x5c/0x118) from [<bf1c7fa4>] (br_handle_frame+0x1b8/0x290 [bridge])
[24711.420367] [<bf1c7fa4>] (br_handle_frame+0x1b8/0x290 [bridge]) from [<c03946f8>] (__netif_receive_skb+0x3cc/0x66c)
[24711.430872] [<c03946f8>] (__netif_receive_skb+0x3cc/0x66c) from [<c031e254>] (mv643xx_eth_poll+0x540/0x734)
[24711.440680] [<c031e254>] (mv643xx_eth_poll+0x540/0x734) from [<c0397390>] (net_rx_action+0x118/0x314)
[24711.449970] [<c0397390>] (net_rx_action+0x118/0x314) from [<c0029924>] (__do_softirq+0xac/0x234)
[24711.458817] [<c0029924>] (__do_softirq+0xac/0x234) from [<c0029f00>] (irq_exit+0x94/0x9c)
[24711.467046] [<c0029f00>] (irq_exit+0x94/0x9c) from [<c00094b0>] (handle_IRQ+0x34/0x84)
[24711.475007] [<c00094b0>] (handle_IRQ+0x34/0x84) from [<c04398d4>] (__irq_svc+0x34/0x98)
[24711.483068] [<c04398d4>] (__irq_svc+0x34/0x98) from [<c0011d6c>] (kirkwood_enter_idle+0x4c/0x94)
[24711.491908] [<c0011d6c>] (kirkwood_enter_idle+0x4c/0x94) from [<c0357a00>] (cpuidle_idle_call+0xc8/0x35c)
[24711.501532] [<c0357a00>] (cpuidle_idle_call+0xc8/0x35c) from [<c0009764>] (cpu_idle+0x88/0xdc)
[24711.510201] [<c0009764>] (cpu_idle+0x88/0xdc) from [<c05d8720>] (start_kernel+0x2a0/0x2f0)
[24711.518512] ---[ end trace e1776fbe32468909 ]---

-- 
     David A. Madore
   ( http://www.madore.org/~david/ )