Re: emacs gets stuck in wait_reading_process_output sometimes

[David Kastrup]

address@hidden writes:

> #0  0x00110422 in __kernel_vsyscall ()
> #1  0x00cb85bd in ___newselect_nocancel () from /lib/libc.so.6
> #2  0x081adc25 in select_wrapper (n=-514, rfd=0x0, wfd=0xbfd5a178, xfd=0x0, 
> tmo=0xbfd5a2a8) at process.c:4204
> #3  0x081b0e3f in wait_reading_process_output (time_limit=0, microsecs=10000, 
> read_kbd=0, do_display=0, wait_for_cell=137764129, wait_proc=0xb819ca0, 
> just_wait_proc=0) at process.c:4587
> #4  0x081b2de7 in Faccept_process_output (process=193043620, seconds=0, 
> millisec=80, just_this_one=137764129) at process.c:3946
>
> This only happens sometimes.
>
> I have a small elisp wrapper for fetchmail, and I think the stuckness
> might happen when fetchmail exits, but I'm not sure.
>
> Any hints how to debug this better when it happens?

Can you check whether it is related to the setting of
process-adaptive-read-buffering?  I seem to remember that tramp
explicitly disabled it to get rid of large inexplicable delays, so it is
not unlikely that there is still some bug lurking in there.

-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum