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32 .\" @(#)mincore.2 8.1 (Berkeley) 6/9/93
40 .Nd determine residency of memory pages
46 .Fn mincore "const void *addr" "size_t len" "char *vec"
50 system call determines whether each of the pages in the region beginning at
55 .\"The beginning address,
57 .\"is first rounded down to a multiple of the page size (see
58 .\".Xr getpagesize 3 ) .
60 .\".Fa addr No + Fa len ,
61 .\"is rounded up to a multiple of the page size.
62 The status is returned in the
64 array, one character per page.
65 Each character is either 0 if the page is not resident, or a combination of
66 the following flags (defined in
68 .Bl -tag -width ".Dv MINCORE_REFERENCED_OTHER"
70 Page is in core (resident).
71 .It Dv MINCORE_REFERENCED
72 Page has been referenced by us.
73 .It Dv MINCORE_MODIFIED
74 Page has been modified by us.
75 .It Dv MINCORE_REFERENCED_OTHER
76 Page has been referenced.
77 .It Dv MINCORE_MODIFIED_OTHER
78 Page has been modified.
81 The information returned by
83 may be out of date by the time the system call returns.
84 The only way to ensure that a page is resident is to lock it into memory
93 system call will fail if:
96 The virtual address range specified by the
100 arguments is not fully mapped.
104 argument points to an illegal address.
116 system call first appeared in