* Login on 2.6.x: can't reopen tty
@ 2005-02-16 22:14 bernd
0 siblings, 0 replies; only message in thread
From: bernd @ 2005-02-16 22:14 UTC (permalink / raw)
To: linux-kernel
Hi all, hope I'm not of topic here but had no response elsewhere...
we observe a problem with login starting with kernel 2.6. Actually
the problem still exists in 2.6.11-rc3-bk3-20050206171922-bigsmp
which we loaded from SuSE. We never saw this problem before and
we used nearly every release in the past. The problem:
When we try to login to a remote machine with telnet or rsh we
sometimes fall back immediately with the message 'connection closed'.
When we try again the login mostly succeeds. The ratio of bad/good
attempts over all is 1/10. It doesn't depend on the state of the
machines e.g. type if hardware or load. It happens on laptops as
well as smp-machines. In messages we see:
"login[xxx]: FATAL: can't reopen tty: No such file or directory"
We debugged login and tracked the problem down to the fopen of
/dev/pts/nn in function opentty() just after a call to the kernel
function vhangup().
The questions:
- why does /dev/pts/nn disappear (and never comes back)?
- is this a kernel bug? is there something wrong in vhangup()?
- is anybody else aware of this problem?
(there's only one additional posting from Yehavi Bourvine)
- is there a solution (pending)?
Thanks in advance for any hint, we are pretty losts...
Greetings
Bernd Rieke
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