Messages in this thread | | | Subject | Trivial hard lockup, SCSI, 2.4.23 | From | Ian Soboroff <> | Date | Tue, 16 Dec 2003 13:28:38 -0500 |
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I've found that I can lock a machine running 2.4.23aa1 by trying to access a nonexistent SCSI device. In other words, if a userspace program tries to access /dev/sdd, but no device is attached on any SCSI bus using that device node, the machine locks hard.
We found this when we disconnected a SCSI hardware RAID from a server, but forgot to remove the cron job which checked its status.
The lockup leaves no errors whatsoever in the logs. I finally tracked it down with the NMI watchdog.
Ian
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