netdev - Re: [Bugme-new] [Bug 10324] New: kernel panic ip_route

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Date:	Wed, 26 Mar 2008 01:12:01 +0200
From:	"Denys" <nuclearcat@...learcat.com>
To:	Andrew Morton <akpm@...ux-foundation.org>, netdev@...r.kernel.org
Cc:	bugme-daemon@...zilla.kernel.org, "Rafael J. Wysocki" <rjw@...k.pl>
Subject: Re: [Bugme-new] [Bug 10324] New: kernel panic ip_route_input

Changing from FIB_TRIE to FIB_HASH, and it is not panicing anymore. It seems
recent patches to FIB_TRIE broke something (i have complicated setup with ifb,
maybe it will help). If you can point me to any patch, i can reverse it and
try again with TRIE.

On Tue, 25 Mar 2008 13:03:02 -0700, Andrew Morton wrote
> (switched to email.  Please respond via emailed reply-to-all, not 
> via the bugzilla web interface).
> 
> On Tue, 25 Mar 2008 12:48:37 -0700 (PDT)
> bugme-daemon@...zilla.kernel.org wrote:
> 
> > http://bugzilla.kernel.org/show_bug.cgi?id=10324
> > 
> >            Summary: kernel panic ip_route_input
> >            Product: Networking
> >            Version: 2.5
> >      KernelVersion: 2.6.25-rc6-git6
> >           Platform: All
> >         OS/Version: Linux
> >               Tree: Mainline
> >             Status: NEW
> >           Severity: normal
> >           Priority: P1
> >          Component: IPV4
> >         AssignedTo: shemminger@...ux-foundation.org
> >         ReportedBy: nuclearcat@...learcat.com
> > 
> > 
> > Latest working kernel version: 2.6.24.x
> > Earliest failing kernel version: 2.6.25-rc6
> 
> A post-2.6.24 regression.
> 
> > Distribution: Custom
> > Hardware Environment: Dual CPU, e100 + e1000
> > Software Environment: Custom build. FIB_TRIE enabled
> > Problem Description: Kernel panic after few seconds running network on heavy
> > traffic (around 350 Mbps). 
> > 
> > Steps to reproduce: It is complicated configuration. I can provide whole image
> > of system, around 128MB (it is semi-embedded), but it will need at least few
> > traffic generators similar to mine. So it is difficult to reproduce. I can
> > apply any patches required, but highly prefferable if they dont make server
> > unreachable. I have panic and oops autoreboot sysctl options, nmi-watchdog and
> > software watchdog enabled.
> > I think it is critical to fix this bug before releasing 2.6.25.
> > 
> > Here is latest message with panic:
> > CONFIG_DEBUG_RODATA, 4K stacks, Frame pointers, CONFIG_DEBUG_STACKOVERFLOW - 
> > enabled.
> > 
> > It reboots recently after bringing up networking. Sometimes even not reaching 
> > place where i am loading netconsole.
> > 
> > Always in ip_route_input. This is 2.6.25-rc6-git6, 2 panic's. They are easy 
> > to reproduce, but i cannot do bisect, cause this machine dont have power 
> > switch and in difficult to reach area.
> >
> 
> I've snipped the log output - it was such a wordwrapped mess :(
> 
> Can you please resend it in a reply-to-all to this email, after ensuring
> that it won't be wordwrapped?
> 
> Thanks.


--
Denys Fedoryshchenko
Technical Manager
Virtual ISP S.A.L.

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