Log Overflowing with read/write wait queue active

[perhaad]

Hello Everyone,

I am having some trouble with Ubuntu 9.10

For some reason my logs keep overflowing. I have attached a screenshot and a snippet of my kernel log too.




Aug 9 18:52:04 eowyn kernel: [180754.977296] tty_release_dev: pts4: read/write wait queue active!
Aug 9 18:52:04 eowyn kernel: [180754.977302] tty_re55454545454545545554545545455455454.95454545 55454555545545545554554554555454554545554545545455 45554555455454554555545545455455455545545554555545 45554545554554554554555455545555545554554554.55455 54554554554554555545545545545554554554555454555545 55455545545555455545545554555545555545545455545454 55545555545455455454554555545455455545555555455455 45555545455545554545554554555545555454554554554554 55454555455545554555455554545554545545455545554545 54545545545555545545455554555545545455455554555454 54554555545554545545554555455455455455455455455545 55554555455545545554555455455554555545554545555545 55545555455554555545455454554554555545545455455555 45545454554545555545545545455545555454555454554555 55455455455554555455555554545545545545554554554545 45545455545554554554555454555454555454555454555455 54555454554554555454555455545455545545455545455554 55455454554555545545554545545545555454545555455555 454555454554555455555455455455545554545554.981767] tty_releas5454555545554554555
Aug 9 18:52:04 eowyn kernel: 45554545545554545545545554555555455554545555454555 4.982062] tty_release_dev: pts4: read/write wait queue active!
Aug 9 18:52:04 eowyn kernel: [180754.982067] tty_release_dev: pts4: read/write wait queue active!
Aug 9 18:52:04 eowyn kernel: [180754.982073] tty_release_dev: pts4: read/write wait queue active!
Aug 9 18:52:04 eowyn kernel: [180754.982079] tty_release_dev: pts4: read/write wait queue active!
Aug 9 18:52:04 eowyn kernel: [180754.982085] tty_release_dev: pts4: read/write wait queue active!
Aug 9 18:52:04 eowyn kernel: [180754.982091] tty_release_dev: pts4: read/write wait queue active!


I looked into /dev/pts/ and there is no pts4 present, Can anyone suggest any steps I can take ?
I also looked at the processes with top and have attached a screenshot, The main running process is dd, I dont understand what is it trying to do.

Syslog too has the same messages



Aug 9 19:26:39 eowyn kernel: [182829.80929.853875] tty_release_dev: pts4: read/write wait queue active!
Aug 9 19:26:39 eowyn kernel: [182829.853878] tty_release_dev: pts4: read/write wait queue active!
Aug 9 19:26:39 eowyn kernel: [182829.853881] tty_release_dev: pts4: read/write wait queue active!
Aug 9 19:26:39 eowyn kernel: [182829.853883] tty_release_dev: pts4: read/write wait queue active!
Aug 9 19:26:39 eowyn kernel: [182829.853886] tty_release_dev: pts4: read/write wait queue active!
Aug 9 19:26:39 eowyn kernel: [182829.853889] tty_release_dev: pts4: read/write wait queue active!


I can reboot the system but I have to do a hard reboot because these messages stop the reboot while they fill up the logs. I dont know when these messages start. I am running.

Linux 2.6.31-22-generic #61-Ubuntu


My mounted filesystems are below. dev/sda5 is the one filling up



Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda5 51137684 39979232 8560748 83% /
udev 2027748 272 2027476 1% /dev
none 2027748 1228 2026520 1% /dev/shm
none 2027748 88 2027660 1% /var/run
none 2027748 0 2027748 0% /var/lock
none 2027748 0 2027748 0% /lib/init/rw
/dev/sda2 103216948 31491664 66482072 33% /home



I would appreciate any help.

Thank You,
Perhaad

[bradshaw_k1te]

I have three identical, clonezilla'ed, notebooks running 10.04.1 LTS and one of them is getting into this sick, spewing mode about every three days. This requires a hard boot to get it back running.

Perhaad, How did you get around this problem?

Thanks, Bradshaw

[perhaad]

Hello Bradshaw,

I never did get around to finding the root of the problem.
I initially thought that it is triggered when the GPU driver misbehaves but that doesnt make sense for me because the problem happens with both AMD and Nvidia GPUs. I have not chased it too much more because it doesnt happen very often for me.

I would appreciate it if some one could point me to ways to see what process is triggering this

--
Perhaad