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Re: emacs gets stuck in wait_reading_process_output sometimes

From: David Kastrup
Subject: Re: emacs gets stuck in wait_reading_process_output sometimes
Date: Wed, 11 Jun 2008 21:47:26 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.0.60 (gnu/linux)

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

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