DDI_IN_PANIC(9F) Kernel Functions for Drivers DDI_IN_PANIC(9F)


NAME


ddi_in_panic - determine if system is in panic state

SYNOPSIS


#include <sys/ddi.h>
#include <sys/sunddi.h>


int ddi_in_panic(void);


INTERFACE LEVEL


Solaris DDI specific (Solaris DDI).

DESCRIPTION


Drivers controlling devices on which the system may write a kernel crash
dump in the event of a panic can call ddi_in_panic() to determine if the
system is panicking.


When the system is panicking, the calls of functions scheduled by
timeout(9F) and ddi_trigger_softintr(9F) will never occur. Neither can
delay(9F) be relied upon, since it is implemented via timeout(9F).


Drivers that need to enforce a time delay such as SCSI bus reset delay
time must busy-wait when the system is panicking.

RETURN VALUES


ddi_in_panic() returns 1 if the system is in panic, or 0 otherwise.

CONTEXT


ddi_in_panic() may be called from any context.

SEE ALSO


dump(9E), delay(9F), ddi_trigger_softintr(9F), timeout(9F)


Writing Device Drivers


June 23, 1997 DDI_IN_PANIC(9F)