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33 .Nm vm_page_aflag_clear , vm_page_aflag_set , vm_page_reference
34 .Nd "change page atomic flags"
40 .Fn vm_page_aflag_clear "vm_page_t m" "uint8_t bits"
42 .Fn vm_page_aflag_set "vm_page_t m" "uint8_t bits"
44 .Fn vm_page_reference "vm_page_t m"
47 .Fn vm_page_aflag_clear
48 atomically clears the specified bits on the page's
53 atomically sets the specified bits on the page's
57 .Fn vm_page_reference m
59 .Bd -literal -offset indent
60 vm_page_aflag_set(m, PGA_REFERENCED);
63 and is the recommended way to mark the page as referenced from
64 third-party kernel modules.
66 These functions neither block nor require any locks to be held
67 around the calls for correctness.
69 The functions arguments are:
70 .Bl -tag -width ".Fa bits"
76 The bits that are set or cleared on the page's flags.
81 can be set or cleared:
82 .Bl -tag -width ".Fa PGA_REFERENCED"
84 The bit may be set to indicate that the page has been recently accessed.
87 sets this bit to reflect the accessed attribute of the page mapping
88 typically updated by processor's memory management unit on the page access.
90 A writeable mapping for the page may exist.
97 bits are only valid for the managed pages.
99 This manual page was written by
100 .An Chad David Aq davidc@acns.ab.ca .