diff options
| -rw-r--r-- | sys/vm/vm_page.c | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/sys/vm/vm_page.c b/sys/vm/vm_page.c index 2e3211fce69e..6dd51b532986 100644 --- a/sys/vm/vm_page.c +++ b/sys/vm/vm_page.c @@ -102,9 +102,11 @@ __FBSDID("$FreeBSD$"); #include <sys/param.h> #include <sys/systm.h> #include <sys/lock.h> +#include <sys/kernel.h> #include <sys/malloc.h> #include <sys/mutex.h> #include <sys/proc.h> +#include <sys/sysctl.h> #include <sys/vmmeter.h> #include <sys/vnode.h> @@ -132,6 +134,11 @@ int vm_page_array_size = 0; long first_page = 0; int vm_page_zero_count = 0; +static int boot_pages = UMA_BOOT_PAGES; +TUNABLE_INT("vm.boot_pages", &boot_pages); +SYSCTL_INT(_vm, OID_AUTO, boot_pages, CTLFLAG_RD, &boot_pages, 0, + "number of pages allocated for bootstrapping the VM system"); + /* * vm_set_page_size: * @@ -175,7 +182,6 @@ vm_page_startup(vm_offset_t vaddr) int biggestone; vm_paddr_t total; - vm_size_t bootpages; total = 0; biggestsize = 0; @@ -219,8 +225,7 @@ vm_page_startup(vm_offset_t vaddr) * Allocate memory for use when boot strapping the kernel memory * allocator. */ - bootpages = UMA_BOOT_PAGES * UMA_SLAB_SIZE; - new_end = end - bootpages; + new_end = end - (boot_pages * UMA_SLAB_SIZE); new_end = trunc_page(new_end); mapped = pmap_map(&vaddr, new_end, end, VM_PROT_READ | VM_PROT_WRITE); |