lkml.org 
[lkml]   [2000]   [Sep]   [20]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: null TTY in tty_fasync?
Marco d'Itri wrote:
>
> At the end of a UUCP poll this message was logged:
>
> Sep 19 23:42:47 wonderland kernel: Warning: null TTY for (04:40) in tty_fasync
>
> What does it mean?
>

Very hard to say.

Ted, Google says this has only been reported three or four times. Could
we please have a BUG() in that code path?

It's probably unrelated to Harley's crash
(http://www.uwsg.iu.edu/hypermail/linux/kernel/0009.1/0049.html), but
then, I have no explanation for Harley's crash.

Having stared sleepily at the code for several evenings I see no way in
which serial_driver.refcount can be non-zero while serial.o's module
refcount is zero. But it happened.

We can rule out the schedule() in release_dev(), which is definitely an
rmmod window bug, because Harley has confirmed that the "release_dev: %s:
read/write wait queue active!" message did not come out (he still
has the logs). It's something else.

It would be a shame to put the `struct module *owner' stuff
into the tty layer prior to having an explanation for all of
this, even though it's on the todo list.
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 12:38    [W:0.057 / U:0.068 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site