diff options
| author | dyson <dyson@FreeBSD.org> | 1996-10-12 21:35:25 +0000 |
|---|---|---|
| committer | dyson <dyson@FreeBSD.org> | 1996-10-12 21:35:25 +0000 |
| commit | 57b4eae0a1b560daffdf0c095a7bcc36bc137858 (patch) | |
| tree | 1514d1dde20f9ca659b86662c3565290d775a93e /sys/kern/kern_exit.c | |
| parent | 01549fd11d3bc0ad90ac3bf29fa51ab279360b55 (diff) | |
| download | FreeBSD-src-57b4eae0a1b560daffdf0c095a7bcc36bc137858.zip FreeBSD-src-57b4eae0a1b560daffdf0c095a7bcc36bc137858.tar.gz | |
Performance optimizations. One of which was meant to go in before the
previous snap. Specifically, kern_exit and kern_exec now makes a
call into the pmap module to do a very fast removal of pages from the
address space. Additionally, the pmap module now updates the PG_MAPPED
and PG_WRITABLE flags. This is an optional optimization, but helpful
on the X86.
Diffstat (limited to 'sys/kern/kern_exit.c')
| -rw-r--r-- | sys/kern/kern_exit.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/sys/kern/kern_exit.c b/sys/kern/kern_exit.c index 531c0b2..dd9d6c4 100644 --- a/sys/kern/kern_exit.c +++ b/sys/kern/kern_exit.c @@ -36,7 +36,7 @@ * SUCH DAMAGE. * * @(#)kern_exit.c 8.7 (Berkeley) 2/12/94 - * $Id: kern_exit.c,v 1.39 1996/09/13 09:17:03 bde Exp $ + * $Id: kern_exit.c,v 1.40 1996/10/04 23:43:12 julian Exp $ */ #include "opt_ktrace.h" @@ -182,9 +182,12 @@ exit1(p, rv) * Can't free the entire vmspace as the kernel stack * may be mapped within that space also. */ - if (vm->vm_refcnt == 1) + if (vm->vm_refcnt == 1) { + pmap_remove_pages(&vm->vm_pmap, VM_MIN_ADDRESS, + VM_MAXUSER_ADDRESS); (void) vm_map_remove(&vm->vm_map, VM_MIN_ADDRESS, VM_MAXUSER_ADDRESS); + } if (SESS_LEADER(p)) { register struct session *sp = p->p_session; |
