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    SubjectRe: WARNING: at drivers/tty/tty_ldisc.c:766 tty_ldisc_reinit+0x52/0x90() [3.0]
    From
    On Fri, Sep 2, 2011 at 4:59 AM, Jiri Slaby <jslaby@suse.cz> wrote:
    > On 08/28/2011 03:15 PM, Dave Jones wrote:
    >>
    >> Just saw this on a box that was recieving an rsync while I ssh'd in.
    >> The ssh session hung.
    >
    > Yes, could you apply the attached debug patch and post a dmesg output?

    I see this problem as well, the debug patch reports the refcount is 2

    You can produce the WARN as below:
    in xterm run:

    exec 0<>/dev/console 1<>/dev/console 2<>/dev/console

    >
    >> WARNING: at drivers/tty/tty_ldisc.c:766 tty_ldisc_reinit+0x52/0x90()
    >> Hardware name:
    >> Modules linked in: nfsd nfs lockd fscache auth_rpcgss nfs_acl sunrpc
    >> p4_clockmod freq_table speedstep_lib nf_conntrack_ipv4 nf_defrag_ipv4
    >> xt_state nf_conntrack microcode serio_raw snd_hda_codec_realtek i2c_i801
    >> snd_hda_intel snd_hda_codec iTCO_wdt snd_hwdep iTCO_vendor_support snd_seq
    >> snd_seq_device snd_pcm snd_timer snd r8169 soundcore mii snd_page_alloc
    >> pata_sil680 i915 drm_kms_helper drm i2c_algo_bit i2c_core video [last
    >> unloaded: mperf]
    >> Pid: 1381, comm: sshd Not tainted 2.6.40-4.fc15.x86_64.debug #1
    >> Call Trace:
    >>  [<ffffffff81058e74>] warn_slowpath_common+0x83/0x9b
    >>  [<ffffffff81058ea6>] warn_slowpath_null+0x1a/0x1c
    >>  [<ffffffff812f8e18>] tty_ldisc_reinit+0x52/0x90
    >>  [<ffffffff812f9415>] tty_ldisc_hangup+0x13f/0x1e1
    >>  [<ffffffff812f21b6>] __tty_hangup+0x111/0x35f
    >>  [<ffffffff812f2429>] tty_vhangup+0xe/0x10
    >>  [<ffffffff812faade>] pty_close+0x128/0x132
    >>  [<ffffffff812f3404>] tty_release+0x1d8/0x4dc
    >>  [<ffffffff81087a2e>] ? lock_release_holdtime.part.8+0x6b/0x72
    >>  [<ffffffff8100eebf>] ? native_sched_clock+0x34/0x36
    >>  [<ffffffff8113cdb2>] fput+0x127/0x1f5
    >>  [<ffffffff81139d90>] filp_close+0x70/0x7b
    >>  [<ffffffff81139e91>] sys_close+0xf6/0x13b
    >>  [<ffffffff814fdf02>] system_call_fastpath+0x16/0x1b
    >
    >
    >
    > --
    > js
    > suse labs
    >



    --
    Regards
    Dave
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