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Why is report_unreachable() considered complicated ? Can someone elaborate in 3-4 sentences on it ? hosted at Digital OceanAdvertise on this site Linux Cross Reference Source navigation Identifier search General search Version: linux-3.13.2 Revert Change Identifier search Type the full name of an identifier cpu_idle+0xab/0xc5[ 113.285384]  ?
Check "Definitions only" to find only definitions of the symbol (unchecked, all references). I'll post a followup. Particularly, it can hit the same neighbour entry! # So that, we try to be accurate and avoid dead loop. --ANK I tried to figure exactly what this comment mean (when References: File Line /net/ipv4/arp.c 127 133 141 155 315 5 references in 1 files. [Source navigation] [Identifier search] [general search] Re: boot crash in arp_error_report() (Re: [GIT] Networking) From: Eric http://lxr.free-electrons.com/ident?i=arp_error_report
As a convenience, extra 999 line numbers denote case-insensitive occurrences (either belonging to a case-insensitive language or differing in case). Visit the LXR main site for more information. Matches are case-sensitive.
Wysocki: "[PATCH] CPU: Avoid using unititialized error variable in disable_nonboot_cpus()" In reply to: Eric Dumazet: "Re: boot crash in arp_error_report() (Re: [GIT] Networking)" Next in thread: David Miller: "Re: boot crash poll_idle+0x31/0x5d[ 113.285384]  ? Preliminary testing shows that Eric's patch solves the problem. It seems to be simple, or am I missing something?
Wysocki: "[PATCH] CPU: Avoid using unititialized error variable in disable_nonboot_cpus()" In reply to: Eric Dumazet: "Re: boot crash in arp_error_report() (Re: [GIT] Networking)" Next in thread: David Miller: "Re: boot crash smp_apic_timer_interrupt+0x6c/0x7a[ 113.285384]  ? Skip to site navigation (Press enter) Question about arp_error_report() (IPV4): clarification Andy Johnson Sat, 05 Jan 2008 00:43:38 -0800 Hi, In neigh_timer_handler( ), (core/neighbour.c), there is a comment which says: # http://www.kneuro.net/cgi-bin/lxr/http/ident?i=arp_error_report i386_start_kernel+0xca/0xd1[ 113.285384] Code: 0c 89 43 70 31 c0 8d 65 f4 5b 5e 5f 5d c3 55 89 e5 53 0f 1f 44 00 00 89 d3 89 d0 e8
Regards, Andy -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Previous message View by Why "hit the same neighbour entry" can cause any complications ? Tested-by: Ingo Molnar Thanks! Reported-by: Ingo Molnar Signed-off-by: Eric Dumazet --- net/core/neighbour.c | 1 + 1 file changed, 1 insertion(+) diff --git a/net/core/neighbour.c b/net/core/neighbour.c index bff3790..6ba1c0e 100644 --- a/net/core/neighbour.c +++ b/net/core/neighbour.c @@ -934,6
neigh_timer_handler+0x0/0x1f9[ 113.285384]  ? __do_softirq+0xc9/0x18d[ 113.285384]  ? __do_softirq+0x0/0x18d[ 113.285384] [ 113.285384]  ? rest_init+0xa1/0xa6[ 113.285384]  ? call_timer_fn+0x6f/0xed[ 113.285384]  ? As far as I understand, eventually ipv4_link_failure() (net/ipv4/route.c) is called when report_unreachable() is invoked. (The path is: arp_error_report() calls dst_link_failure(skb), which in case of ipv4, calls ipv4_link_failure().) So it seems simply
apic_timer_interrupt+0x36/0x40[ 113.285384]  ? Visit the LXR main site for more information. report_unreachable is very complicated # routine. Linux Cross Reference Free Electrons Embedded Linux Experts •source navigation •identifier search •freetext search • Version: 2.0.402.2.262.4.318.104.22.168.22.214.171.124.183.194.04.14.126.96.36.199.64.74.8 Identifier: arp_error_report Defined as a function prototype in: net/ipv4/arp.c, line 130 Defined as a
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neigh_timer_handler+0x152/0x1f9[ 113.285384]  ? start_kernel+0x3ed/0x3f2[ 113.285384]  ? neigh_invalidate+0x6d/0x84[ 113.285384]  ? Thanks ! [PATCH] net: fix __neigh_event_send() commit 7fee226ad23 (net: add a noref bit on skb dst) missed one spot where an skb is enqueued, with a possibly not refcounted dst entry.
run_timer_softirq+0x139/0x16f[ 113.285384]  ? irq_exit+0x3a/0x6d[ 113.285384]  ? neigh_timer_handler+0x0/0x1f9[ 113.285384]  ?
Identifier: Definitions only Results for arp_error_report Definitions Type Member of File Line function prototype or declaration /net/ipv4/arp.c 127 function definition /net/ipv4/arp.c 315 2 declarations in 1 files.