Linux Ethernet Bridging - May 2009 - [Bridge] sigsegv from rstpd on ppc

Hi,

I want to run RSTP on ppc_8xx target, kernel 2.6.19.
Is there some recommendation or restriction from RSTP implementation for this
condition?

I have a problem:
I ran rstpd-daemon on ppc and it dies in one minute after start with SIGSEGV
exception. Debuging shows that the reason in
epoll_list.c file , epoll_main_loop() function, one of element(ev) of
epoll_event[] array:

ev[i].data.ptr->ref_ev = &ev[i];

This code kills rstpd.

Is this known problem? Where should I find solution?

Thanks.
Liliya.

What code are you using? And from where? All the code I can find in
epoll_loop.c has things like:

for (i = 0; i < r; i++) {
    struct epoll_event_handler *p = ev[i].data.ptr;
    if (p != NULL)
      p->ref_ev = &ev[i];
}

Maybe ev[i].data.ptr is NULL and causing the crash. This can happen
when we have indicated that we don't want epoll to tell us events for
this fd anymore but an earlier event is still returned by epoll.

Another thing is that all the bridge changes needed for userspace STP
are there only in Linux 2.6.22. So you will not be able to use rstpd
on 2.6.19.

On Fri, May 8, 2009 at 7:41 AM, Butorina Lilya <lilybox at yandex.ru>
wrote:
>
> Hi,
>
> I want to run RSTP on ppc_8xx target, kernel 2.6.19.
> Is there some recommendation or restriction from RSTP implementation for
this condition?
>
> I have a problem:
> I ran rstpd-daemon on ppc and it dies in one minute after start with
SIGSEGV exception. Debuging shows that the reason in
> epoll_list.c file , epoll_main_loop() function, one of element(ev) of
epoll_event[] array:
>
> ev[i].data.ptr->ref_ev = &ev[i];
>
> This code kills rstpd.
>
> Is this known problem? Where should I find solution?
>
> Thanks.
> Liliya.
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