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| author | alc <alc@FreeBSD.org> | 2010-07-03 18:25:37 +0000 |
|---|---|---|
| committer | alc <alc@FreeBSD.org> | 2010-07-03 18:25:37 +0000 |
| commit | 8c92592cd0f900b8317064587c9a03e612c7555d (patch) | |
| tree | e124cd18b228bb42a1da0240ddddded94e2f80c2 /sys/vm | |
| parent | 17ff9e909627cc29d8a4b79d22ec3a4d77791d2f (diff) | |
| download | FreeBSD-src-8c92592cd0f900b8317064587c9a03e612c7555d.zip FreeBSD-src-8c92592cd0f900b8317064587c9a03e612c7555d.tar.gz | |
Improve the comment and man page for vm_page_alloc(). Specifically,
document one of the optional flags; clarify which of the flags are
optional (and which are not), and remove mention of a restriction on
the reclamation of cached pages that no longer holds since version 7.
MFC after: 1 week
Diffstat (limited to 'sys/vm')
| -rw-r--r-- | sys/vm/vm_page.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/sys/vm/vm_page.c b/sys/vm/vm_page.c index b1354e9..fc9fdd4 100644 --- a/sys/vm/vm_page.c +++ b/sys/vm/vm_page.c @@ -1144,14 +1144,19 @@ vm_page_cache_transfer(vm_object_t orig_object, vm_pindex_t offidxstart, * Allocate and return a memory cell associated * with this VM object/offset pair. * - * page_req classes: + * The caller must always specify an allocation class. + * + * allocation classes: * VM_ALLOC_NORMAL normal process request * VM_ALLOC_SYSTEM system *really* needs a page * VM_ALLOC_INTERRUPT interrupt time request - * VM_ALLOC_ZERO zero page + * + * optional allocation flags: + * VM_ALLOC_ZERO prefer a zeroed page * VM_ALLOC_WIRED wire the allocated page * VM_ALLOC_NOOBJ page is not associated with a vm object * VM_ALLOC_NOBUSY do not set the page busy + * VM_ALLOC_IFCACHED return page only if it is cached * VM_ALLOC_IFNOTCACHED return NULL, do not reactivate if the page * is cached * |
