INTRO (9) NetBSD Kernel Developer's Manual INTRO (9) NAME ...

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KMEM_ZALLOC (9) NetBSD Kernel Developer’s Manual KMEM_ZALLOC (9)NAMEkmem_zalloc —allocate zero-initialized kernel wired memorySYNOPSIS#include void ∗kmem_zalloc(size_t size , km_flag_t kmflags);DESCRIPTIONkmem_zalloc() is the equivalent of kmem_alloc(), except that it initializes the memory to zero.SEE ALSOintro(9), kmem_alloc(9), kmem_free(9), memoryallocators(9)CAVEATSkmem_zalloc() can not be used from interrupt context.NetBSD 3.0 June 25, 2006 1
KNOTE (9) NetBSD Kernel Developer’s Manual KNOTE (9)NAMEknote, KNOTE —raise kernel eventSYNOPSIS#include voidknote(struct klist ∗list , long hint);KNOTE(struct klist ∗list , long hint);DESCRIPTIONThe knote() function provides a hook into the kqueue kernel event notification mechanism to allow sectionsof the kernel to raise a kernel event in the form of a ‘knote’, which is a struct knote as defined in〈sys/event.h〉.knote() takes a singly linked list of knotes, along with a hint (which is passed to the appropriate filterroutine). knote() then walks the list making calls to the filter routine for each knote. As each knote containsa reference to the data structure that it is attached to, the filter may choose to examine the data structurein deciding whether an event should be reported. The hint is used to pass in additional information, whichmay not be present in the data structure that the filter examines.If the filter decides that the event should be returned, it returns a non-zero value and knote() links the knoteonto the tail end of the active list in the corresponding kqueue for the application to retrieve. Ifthe knote isalready on the active list, no action is taken, but the call to the filter occurs in order to provide an opportunityfor the filter to record the activity.knote() must not be called from interrupt contexts running at an interrupt priority level higher thansplsched().KNOTE() is a macro that calls knote(list , hint) if list is not empty.SEE ALSOkqueue(2), kfilter_register(9)HISTORYThe knote() and KNOTE() functions first appeared in FreeBSD 4.1, and then in NetBSD 2.0.AUTHORSThe kqueue() system was written by Jonathan Lemon 〈jlemon@FreeBSD.org〉.NetBSD 3.0 February 18, 2004 1
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