Re: [mpls-linux-devel] kernel 2.6.32 or better

[Renato W. <ren...@gm...>]

This is all very strange to me. I've tried the following versions and never
had problems:

   - mpls 1950 on kernel 2.6.15.1
   - mpls 1963 on kernel 2.6.27.24
   - mpls 1963 on kernel 2.6.32.11

My tests are conducted in VirtualBox VMs and a powerpc machine. You should
provide us some debug information so we can try to help you.

One question: on what kernel versions are you facing this problem?

Regarding skbuff, there were only a minor interface change... (2.6.27 ->
2.6.32)

* skb->dst = X;
  To
  skb_dst_set(skb, X);

* X = skb->dst;
  To
  X = skb_dst(skb);

Files:
/net/ipv4/
    mpls4.c
    ip_output.c
/net/ipv6/
    mpls6.c
    ip6_output.c
/net/mpls/
    mpls_dst.c
    mpls_input.c
    mpls_opcode.c (considering skb = (*skb))
    mpls_output.c
    mpls_tunnel.c
/net/netfilter/
    xt_mpls.c

2010/5/10 Chris Robson <Chr...@nr...>

>
> Ahsan
>
> There isn't much more than what you say is happening to your setup.  MPLS
> packets go out OK but the receiving system locks up tight when the packet is
> receive.  Note one can only assume its on receive because the system is
> inaccessible after the packet leaves the source system.
>
> My next step is to turn on some debugging dumps on the receive side.  My
> guess on the problem is issues with skbuff since that is where the major
> changes are.
>
> ....Chris
>
>
> On 05/07/2010 07:44 AM, Ahsan Tariq wrote:
>
> Hi chris,
>
> quote: "
>
> Jorge
>
> Testing today shows that the lock up problem still exist after applying
> the patch you sent out.  Unfortunately I can't give you a tcpdump from
> Host A cause the system locks up tight and requires a hard power reset.
>
> The OS I'm using is FC12 version 2.6.32.11-99.fc12.x86_64 modified with
> the Renato patch and your additional patch.  If you want some additional
> info I can re-run test but please provide specifics to how/what/where
>
> you need things done, remembering I'm not an expert in system level
> debugging but can parakeet command requires fairly good (:-) *sigh*.
> Maybe I show use a patch file created by you as a first step?  Can you
>
> send me something direct?
>
> Data and config info:
>
> Host A (eth1/10.50.1.1 - eth1:1/10.50.210.1)<---->Host B(eth1/10.50.1.2
>
> - eth1:1/10.50.110.1)
>
> "
>
>
> Could you tell me more about the lock up problem that you are facing using
> mpls-linux. I am having a similar problem. In my case using the same example
> as you posted, if I send a ping from B to A then A locks up and vice versa
> i.e. MPLS packets are being created with no problem but on recieving MPLS
> packets a system hangs up.
>
> In your case you mentioned that host A hangs. Does it hang on rcieving an
> MPLS packet or generating one ?
>
> Thanks,
>
> Ahsan
>
>
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