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Re: Gnus stuck in select/gettimeofday loop

From: Romain Francoise
Subject: Re: Gnus stuck in select/gettimeofday loop
Date: Sat, 11 Mar 2006 17:23:20 +0100 (Kim F. Storm) writes:

> Actually, I have seen this too occasionally with CVS Emacs.

Do you use article prefetching?[1]

I had never managed to reproduce this bug after seeing it reported a few
times, and after enabling prefetching a few days ago suddenly I keep
running into it...  And I can confirm that C-g has absolutely no effect
when it happens.

The backtrace looks like the following:

#0  0xffffe410 in __kernel_vsyscall ()
#1  0xa7756d6d in select () from /lib/tls/i686/cmov/
#2  0x081ee002 in wait_reading_process_output (time_limit=0, microsecs=100, 
    read_kbd=0, do_display=0, wait_for_cell=137976009, wait_proc=0x92b2190, 
    just_wait_proc=0) at process.c:4496
#3  0x081eceef in Faccept_process_output (process=153821588, timeout=0, 
    timeout_msecs=800, just_this_one=137976009) at process.c:3895
#4  0x081ac24c in Ffuncall (nargs=4, args=0xafa6f860) at eval.c:2889
#5  0x081e4608 in Fbyte_code (bytestr=151252459, vector=151256380, maxdepth=56)
    at bytecode.c:694

(I'm not sure if there is really a bug, or if it's just a manifestation
of the flakiness of my nntp server.)

> In all cases it seems like it is stuck (or just dead slow) reading the
> active file from the news server.

Do you think it could be related to adaptive read buffering?

Romain Francoise <> | The sea! the sea! the open
it's a miracle -- | sea! The blue, the fresh, the
                                        | ever free! --Bryan W. Procter

[1]  See the `gnus-asynchronous' variable.

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