ddi-forceattach man page on OpenIndiana

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ddi-forceattach(9P)	 Kernel Properties for Drivers	   ddi-forceattach(9P)

NAME
       ddi-forceattach,	 ddi-no-autodetach  -  properties  controlling	driver
       attach/detach behavior

DESCRIPTION
       Solaris device drivers are attached by  devfsadm(1M) and by the	kernel
       in  response  to	 open(2)  requests from applications. Drivers not cur‐
       rently in use can be detached when the system experiences memory	 pres‐
       sure.  The ddi-forceattach and ddi-no-autodetach properties can be used
       to customize driver attach/detach behavior.

       The ddi-forceattach is an integer property, to be set globally by means
       of  the	driver.conf(4)	file.  Drivers with this property set to 1 are
       loaded and attached to all possible instances  during  system  startup.
       The driver will not be auto-detached due to system memory pressure.

       The  ddi-no-autodetach  is  an  integer	property to be set globally by
       means of the driver.conf(4) file or created dynamically by  the	driver
       on  a per-instance basis with  ddi_prop_update_int(9F). When this prop‐
       erty is set to 1, the kernel will not auto-detach driver due to	system
       memory pressure.

       Note  that  ddi-forceattach  implies  ddi-no-autodetach. Setting either
       property to a non-integer value or an integer value not equal to 1 pro‐
       duces undefined results. These properties do not prevent driver detach‐
       ing in response to reconfiguration requests, such as executing commands
       cfgadm(1M), modunload(1M), rem_drv(1M), and update_drv(1M).

SEE ALSO
       driver.conf(4)

       Writing Device Drivers

SunOS 5.11			  18 May 2001		   ddi-forceattach(9P)
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