Re: Asterisk deadlocks since Kernel 4.1

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On Wed, Nov 18, 2015, at 21:23, Stefan Priebe wrote:
> 
> Am 17.11.2015 um 20:43 schrieb Thomas Gleixner:
> > On Tue, 17 Nov 2015, Stefan Priebe wrote:
> >> I've now also two gdb backtraces from two crashes:
> >> http://pastebin.com/raw.php?i=yih5jNt8
> >>
> >> http://pastebin.com/raw.php?i=kGEcvH4T
> >
> > They don't tell me anything as I have no idea of the inner workings of
> > asterisk. You might be better of to talk to the asterisk folks to help
> > you track down what that thing is waiting for, so we can actually look
> > at a well defined area.
> 
> The asterisk guys told me it's a livelock asterisk is waiting for 
> getaddrinfo / recvmsg.
> 
> Thread 2 (Thread 0x7fbe989c6700 (LWP 12890)):
> #0  0x00007fbeb9eb487d in recvmsg () from /lib/x86_64-linux-gnu/libc.so.6
> #1  0x00007fbeb9ed4fcc in ?? () from /lib/x86_64-linux-gnu/libc.so.6
> #2  0x00007fbeb9ed544a in ?? () from /lib/x86_64-linux-gnu/libc.so.6
> #3  0x00007fbeb9e92007 in getaddrinfo () from 
> /lib/x86_64-linux-gnu/libc.so.6

Florian Weimer recently patched glibc to detect filedescriptors which
have been reused incorrectly in the glibc name resolving routines:
<https://sourceware.org/ml/libc-alpha/2015-10/msg00865.html>

Could you determine the type of filedescriptor in /proc/pid/fd and
/proc/net/netlink by matching inodes?

Thanks,
Hannes
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