I/O and machine hangs after loading SCSI Qlogic qioctlmod.ko ioctl device driver on RHEL4
Issue
- I/O and/or machine hangs when userspace monitoring software uses a SCSI ioctl driver.
- Sudden high load or IO wait, system unresponsive
Environment
- Red Hat Enterprise Linux 4.8
- Note that Red Hat Enterprise Linux 5 (and later) is specifically not affected.
- Qlogic HBA
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