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    SubjectRe: something funny about tty's on 2.6.4-rc1-mm1
    On Mon, 1 Mar 2004, Nuno Monteiro wrote:

    >
    > Hi all,
    >
    > I just took 2.6.4-rc1-mm1 for a spin, and there's definitely something
    > funny about tty's. I left the computer unattended and had visitors over,
    > among them small children who, apparently, decided I needed 350 aterm's
    > open ;-). So, after they left I issued a 'killall -9 aterm' and fired up
    > a new one, and here's something definitely interesting:
    >
    > nuno@hobbes:~$ w
    > 18:33:56 up 4:08, 157 users, load average: 0.03, 0.89, 1.51
    > USER TTY LOGIN@ IDLE JCPU PCPU WHAT
    > nuno :0 14:26 ?xdm? 3:55 0.95s gnome-session
    > nuno pts/358 18:30 0.00s 0.10s 0.00s w
    >

    But `w` just reads /var/run/utmp to see who's logged on. It reads
    /proc for info. If you just killed all the tasks as you state,
    (with KILL instead of TERM) utmp probably doesn't have logout
    entries. This seems like a `w` problem, not a kernel problem.

    The pts ttys will get recycled just like pids. There is no
    error here either.

    >
    > I know for a fact that I don't have 157 logged in users (well, there's
    > only 45 processes running right now), and shouldn't pts' be recycled, and
    > a lower number be assigned? The last kernel I ran was 2.6.3, and none of
    > this happened.
    >
    > My config is:
    >
    > CONFIG_UNIX98_PTYS=y
    > CONFIG_LEGACY_PTYS=y
    > CONFIG_LEGACY_PTY_COUNT=512
    >
    > and this is a plain jane static /dev -- not devfs nor udev. Despite the
    > supposedly 157 users logged in, /dev/pts only contains '358', which is
    > the one allocated to this instance of aterm right now.
    >
    > nuno@hobbes:~$ ls -l /dev/pts
    > total 0
    > crw--w---- 1 nuno users 136, 102 Mar 1 18:41 358
    >
    > In the mean time I'll fall back to 2.6.3.
    >
    >
    > Regards,
    >
    >
    > Nuno
    >
    > -
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    > Please read the FAQ at http://www.tux.org/lkml/
    >

    Cheers,
    Dick Johnson
    Penguin : Linux version 2.4.24 on an i686 machine (797.90 BogoMips).
    Note 96.31% of all statistics are fiction.


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