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| author | kib <kib@FreeBSD.org> | 2014-07-24 16:29:44 +0000 |
|---|---|---|
| committer | kib <kib@FreeBSD.org> | 2014-07-24 16:29:44 +0000 |
| commit | d7d6313cf44fa12148b5cee3cb0542287af7a37f (patch) | |
| tree | 671bf425a15fe4f80c0c080b0d8ce7545ed6f149 /sys/vm/vm_page.c | |
| parent | bc8d80ff4e8a4a3106923968524f11648f134483 (diff) | |
| download | FreeBSD-src-d7d6313cf44fa12148b5cee3cb0542287af7a37f.zip FreeBSD-src-d7d6313cf44fa12148b5cee3cb0542287af7a37f.tar.gz | |
MFC r267213 (by alc):
Add a page size field to struct vm_page.
Approved by: alc
Diffstat (limited to 'sys/vm/vm_page.c')
| -rw-r--r-- | sys/vm/vm_page.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/sys/vm/vm_page.c b/sys/vm/vm_page.c index 0242fe5..3f80238 100644 --- a/sys/vm/vm_page.c +++ b/sys/vm/vm_page.c @@ -3058,6 +3058,31 @@ vm_page_is_valid(vm_page_t m, int base, int size) } /* + * vm_page_ps_is_valid: + * + * Returns TRUE if the entire (super)page is valid and FALSE otherwise. + */ +boolean_t +vm_page_ps_is_valid(vm_page_t m) +{ + int i, npages; + + VM_OBJECT_ASSERT_LOCKED(m->object); + npages = atop(pagesizes[m->psind]); + + /* + * The physically contiguous pages that make up a superpage, i.e., a + * page with a page size index ("psind") greater than zero, will + * occupy adjacent entries in vm_page_array[]. + */ + for (i = 0; i < npages; i++) { + if (m[i].valid != VM_PAGE_BITS_ALL) + return (FALSE); + } + return (TRUE); +} + +/* * Set the page's dirty bits if the page is modified. */ void |
