LKDTT - Default Crash Points

Default crash points

Even though testers are free to add new CPs, LKDTT is furnished with a set of essential CPs, that is, crash scenarios considered basic and that should always be tested. The list follows:

• IRQ handling with IRQs disabled (INT_HARDWARE_ENTRY) This CP is crossed whenever an interrupt that is to be handled with IRQs disabled occurs.
• IRQ handling with IRQs enabled (INT_HW_IRQ_EN) This is the equivalent to the previous CP with interrupts enabled (see code listing 2).
• Tasklet with IRQs disabled (TASKLET) If this CP is active crashes during the service of Linux tasklets with interrupts disabled can be recreated.
• Tasklet with IRQs enabled (INT_TASKLET_ENTRY) Using this CP it is possible to cause a crash when the kernel is in the middle of processing a tasklet with interrupts enabled.
• Block I/O (FS_DEVRW) This CP is used to bring down the system while the file system is performing low-level access to block devices.
• Swap-out (MEM_SWAPOUT) This CP is located in the code that tries to allocate space for anonymous process memory.
• Timer processing (TIMERADD) This is a CP situated in the code that starts and re-starts high resolution timers.
• SCSI command (SCSI_DISPATCH_CMD) This CP is situated in the SCSI command dispatching code.
• IDE command (IDE_CORE_CP) This CP is situated in the code that handles I/O operations on IDE block devices.