diff options
| author | dyson <dyson@FreeBSD.org> | 1995-09-03 20:40:43 +0000 |
|---|---|---|
| committer | dyson <dyson@FreeBSD.org> | 1995-09-03 20:40:43 +0000 |
| commit | 19cfe6b04c65e8642786c0ed37f1699b1461c945 (patch) | |
| tree | 5f4ed8f7995c003619ed9cd8360e2533d535e372 /sys/vm/vm_kern.c | |
| parent | 94c170a64751b11530d3a419d295d6fd6f38c938 (diff) | |
| download | FreeBSD-src-19cfe6b04c65e8642786c0ed37f1699b1461c945.zip FreeBSD-src-19cfe6b04c65e8642786c0ed37f1699b1461c945.tar.gz | |
Machine independent changes to support pre-zeroed free pages. This
significantly improves demand-zero performance.
Diffstat (limited to 'sys/vm/vm_kern.c')
| -rw-r--r-- | sys/vm/vm_kern.c | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/sys/vm/vm_kern.c b/sys/vm/vm_kern.c index 1f21ec5..e4ab774 100644 --- a/sys/vm/vm_kern.c +++ b/sys/vm/vm_kern.c @@ -61,7 +61,7 @@ * any improvements or extensions that they make and grant Carnegie the * rights to redistribute these changes. * - * $Id: vm_kern.c,v 1.14 1995/07/13 08:48:25 davidg Exp $ + * $Id: vm_kern.c,v 1.15 1995/07/29 11:44:20 bde Exp $ */ /* @@ -178,11 +178,12 @@ kmem_alloc(map, size) for (i = 0; i < size; i += PAGE_SIZE) { vm_page_t mem; - while ((mem = vm_page_alloc(kernel_object, offset + i, VM_ALLOC_NORMAL)) == NULL) { + while ((mem = vm_page_alloc(kernel_object, offset + i, (VM_ALLOC_NORMAL|VM_ALLOC_ZERO))) == NULL) { VM_WAIT; } - vm_page_zero_fill(mem); - mem->flags &= ~PG_BUSY; + if ((mem->flags & PG_ZERO) == 0) + vm_page_zero_fill(mem); + mem->flags &= ~(PG_BUSY|PG_ZERO); mem->valid = VM_PAGE_BITS_ALL; } @@ -346,10 +347,7 @@ kmem_malloc(map, size, waitflag) vm_map_unlock(map); return (0); } -#if 0 - vm_page_zero_fill(m); -#endif - m->flags &= ~PG_BUSY; + m->flags &= ~(PG_BUSY|PG_ZERO); m->valid = VM_PAGE_BITS_ALL; } |
