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A cache miss is a failed attempt to read or write a piece of data in the cache, which results in a main memory access with much shorter latency and increased speed.
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devclass_get_devices(9) [minix man page]

DEVCLASS_GET_DEVICES(9) 				   BSD Kernel Developer's Manual				   DEVCLASS_GET_DEVICES(9)

NAME
devclass_get_devices -- get a list of devices in a devclass SYNOPSIS
#include <sys/param.h> #include <sys/bus.h> int devclass_get_devices(devclass_t dc, device_t **devlistp, int *devcountp); DESCRIPTION
Retrieve a list of all device instances currently in the devclass and return the list in *devlistp and the count in *devcountp. The memory allocated for the list should be freed using free(*devlistp, M_TEMP), even if *devcountp is 0. RETURN VALUES
Zero is returned on success, otherwise an appropriate error is returned. SEE ALSO
devclass(9), device(9) AUTHORS
This manual page was written by Doug Rabson. BSD
May 19, 2005 BSD

Check Out this Related Man Page

DEVCLASS(9)						   BSD Kernel Developer's Manual					       DEVCLASS(9)

NAME
devclass -- object representing a class of devices SYNOPSIS
typedef struct devclass *devclass_t; DESCRIPTION
The devclass object has two main functions in the system. The first is to manage the allocation of unit numbers for device instances and the second is to hold the list of device drivers for a particular bus type. Each devclass has a name and there cannot be two devclasses with the same name. This ensures that unique unit numbers are allocated to device instances. Beware that this means devclass must be the same for different bus attachments of the same device driver. SEE ALSO
devclass_add_driver(9), devclass_delete_driver(9), devclass_find(9), devclass_find_driver(9), devclass_get_device(9), devclass_get_devices(9), devclass_get_maxunit(9), devclass_get_name(9), devclass_get_softc(9), device(9), driver(9) AUTHORS
This manual page was written by Doug Rabson. BSD
June 16, 1998 BSD

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