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Groups > linux.kernel > #1215856 > unrolled thread
| Started by | Jeffrey Merkey <jeffmerkey@gmail.com> |
|---|---|
| First post | 2015-08-30 01:00 +0200 |
| Last post | 2015-08-31 20:20 +0200 |
| Articles | 3 — 2 participants |
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igmp broadcast storm Red Hat EL7 3.1 Kernel Jeffrey Merkey <jeffmerkey@gmail.com> - 2015-08-30 01:00 +0200
Re: igmp broadcast storm Red Hat EL7 3.1 Kernel Cong Wang <xiyou.wangcong@gmail.com> - 2015-08-31 18:50 +0200
Re: igmp broadcast storm Red Hat EL7 3.1 Kernel Jeffrey Merkey <jeffmerkey@gmail.com> - 2015-08-31 20:20 +0200
| From | Jeffrey Merkey <jeffmerkey@gmail.com> |
|---|---|
| Date | 2015-08-30 01:00 +0200 |
| Subject | igmp broadcast storm Red Hat EL7 3.1 Kernel |
| Message-ID | <q2Xgm-7rA-3@gated-at.bofh.it> |
When installing Centos 7 running kernel 3.1 (Centos 7 distro) the system generates an igmp broadcast storm which locks up and knocks down a Century Link DSL router. Powering the router off clears the broadcast storm. The bug is kernel related and resembles very closely another bug seen about 10 years ago with Caldera's distro's on 2.4. The bug occurs on the ia32 beta build. The bug DOES NOT exist in the 64 bit x86_64 versions. I will attempt to debug it further since I have my own debugger and try to run it down and provide more info. Jeff -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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| From | Cong Wang <xiyou.wangcong@gmail.com> |
|---|---|
| Date | 2015-08-31 18:50 +0200 |
| Message-ID | <q3Arp-50w-29@gated-at.bofh.it> |
| In reply to | #1215856 |
(Cc'ing netdev) On Sat, Aug 29, 2015 at 3:50 PM, Jeffrey Merkey <jeffmerkey@gmail.com> wrote: > When installing Centos 7 running kernel 3.1 (Centos 7 distro) the > system generates an igmp broadcast storm which locks up and knocks > down a Century Link DSL router. Powering the router off clears the > broadcast storm. > > The bug is kernel related and resembles very closely another bug seen > about 10 years ago with Caldera's distro's on 2.4. The bug occurs on > the ia32 beta build. The bug DOES NOT exist in the 64 bit x86_64 > versions. I will attempt to debug it further since I have my own > debugger and try to run it down and provide more info. > A reproducer and/or bisect would help a lot. Thanks. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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| From | Jeffrey Merkey <jeffmerkey@gmail.com> |
|---|---|
| Date | 2015-08-31 20:20 +0200 |
| Message-ID | <q3BQu-79K-9@gated-at.bofh.it> |
| In reply to | #1216315 |
I was able to reproduce it last night with 2.6.32 on Centos 6.3 so it does not seem confined to just the 3.X tree. I think this is something that's been lurking in the kernel for years and just has a hard time showing up. Bugs that go away on their own come back on their own. I got a trace of the traffic but need one of the os. I'll attempt to get a trace of this again since I seem to be able to reproduce it by routing NetFlix traffic through the router while I am streaming live videos on Linux. I will setup the system to trap the bug and post the traces. Jeff On 8/31/15, Cong Wang <xiyou.wangcong@gmail.com> wrote: > (Cc'ing netdev) > > On Sat, Aug 29, 2015 at 3:50 PM, Jeffrey Merkey <jeffmerkey@gmail.com> > wrote: >> When installing Centos 7 running kernel 3.1 (Centos 7 distro) the >> system generates an igmp broadcast storm which locks up and knocks >> down a Century Link DSL router. Powering the router off clears the >> broadcast storm. >> >> The bug is kernel related and resembles very closely another bug seen >> about 10 years ago with Caldera's distro's on 2.4. The bug occurs on >> the ia32 beta build. The bug DOES NOT exist in the 64 bit x86_64 >> versions. I will attempt to debug it further since I have my own >> debugger and try to run it down and provide more info. >> > > A reproducer and/or bisect would help a lot. > > Thanks. > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.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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