GnuTLS hangs in Emacs

[Lars Ingebrigtsen]

I'm trying to investigate some "hard" Emacs hangs that seem
network-related.

My laptop went into sleep mode, and when it came back, Emacs hung hard.
It may have changed its IP address or something.

strace showed the following:

Process 12143 attached with 3 threads - interrupt to quit
[pid 12143] sendto(10, "\340\204s\374\204\22\231\26M;?\307\220=^\206T\371Q\374o\324\246i\31\256\31$\314\315\367\362"..., 136, 0, NULL, 0 <unfinished ...>
[pid 12145] restart_syscall(<... resuming interrupted call ...> <unfinished ...>
[pid 12144] restart_syscall(<... resuming interrupted call ...> <unfinished ...>
[pid 12143] <... sendto resumed> )      = -1 EAGAIN (Resource temporarily unavailable)
[pid 12143] sendto(10, "\340\204s\374\204\22\231\26M;?\307\220=^\206T\371Q\374o\324\246i\31\256\31$\314\315\367\362"..., 136, 0, NULL, 0) = -1 EAGAIN (Resource temporarily unavailable)
[pid 12143] sendto(10, "\340\204s\374\204\22\231\26M;?\307\220=^\206T\371Q\374o\324\246i\31\256\31$\314\315\367\362"..., 136, 0, NULL, 0) = -1 EAGAIN (Resource temporarily unavailable)
[pid 12143] sendto(10, "\340\204s\374\204\22\231\26M;?\307\220=^\206T\371Q\374o\324\246i\31\256\31$\314\315\367\362"..., 136, 0, NULL, 0) = -1 EAGAIN (Resource temporarily unavailable)

larsi at rusty:~/pgnus$ ls -l /proc/12143/fd/10 
lrwx------ 1 larsi larsi 64 2012-01-27 13:14 /proc/12143/fd/10 -> socket:[586673]
larsi at rusty:~/pgnus$ lsof | grep 586673
emacs     12143      larsi   10u     IPv4             586673      0t0     TCP 10.0.1.2:50099->dough.gmane.org:nntp (ESTABLISHED)

This is a STARTTLS connection, so I'm guessing that the sendto up there
is from GnuTLS.

I know virtually nothing about GnuTLS internals, so first of all -- does
it seem likely that that sendto is from GnuTLS?  And if so, is there any
way to tell GnuTLS to not, er, try so very hard to send stuff?

This is with Ubuntu 11.10, which has GnuTLS 2.10.5, apparently.

-- 
(domestic pets only, the antidote for overdose, milk.)
  http://lars.ingebrigtsen.no  *  Sent from my Rome