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|VM_FAULT_PREFAULT(9)||Kernel Developer's Manual||VM_FAULT_PREFAULT(9)|
NAME¶vm_fault_prefault — cluster page faults into a process's address space
#include <vm/pmap.h> void
vm_fault_prefault(pmap_t pmap, vm_offset_t addra, vm_map_entry_t entry);
DESCRIPTION¶The vm_fault_prefault() function provides a means of clustering pagefaults into a process's address space. It operates upon the physical map pmap. The entry argument specifies the entry to be prefaulted; the addra argument specifies the beginning of the mapping in the process's virtual address space. It is typically called by vm_fault() after the first page fault. It benefits the execve(2) system call by eliminating repetitive calls to vm_fault(), which would otherwise be made to bring the process's executable pages into physical memory.
IMPLEMENTATION NOTES¶This is a machine-independent function which calls the machine-dependent pmap_is_prefaultable(9) helper function to determine if a page may be prefaulted into physical memory.
SEE ALSO¶execve(2), pmap_is_prefaultable(9)
AUTHORS¶This manual page was written by Bruce M Simpson ⟨email@example.com⟩.
|July 21, 2003||Debian|