Eliminated many redundant vm_map_lookup operations for vm_mmap.

Speed up for vfs_bio -- addition of a routine bqrelse to greatly diminish
	overhead for merged cache.
Efficiency improvement for vfs_cluster.  It used to do alot of redundant
	calls to cluster_rbuild.
Correct the ordering for vrele of .text and release of credentials.
Use the selective tlb update for 486/586/P6.
Numerous fixes to the size of objects allocated for files.  Additionally,
	fixes in the various pagers.
Fixes for proper positioning of vnode_pager_setsize in msdosfs and ext2fs.
Fixes in the swap pager for exhausted resources.  The pageout code
	will not as readily thrash.
Change the page queue flags (PG_ACTIVE, PG_INACTIVE, PG_FREE, PG_CACHE) into
	page queue indices (PQ_ACTIVE, PQ_INACTIVE, PQ_FREE, PQ_CACHE),
	thereby improving efficiency of several routines.
Eliminate even more unnecessary vm_page_protect operations.
Significantly speed up process forks.
Make vm_object_page_clean more efficient, thereby eliminating the pause
	that happens every 30seconds.
Make sequential clustered writes B_ASYNC instead of B_DELWRI even in the
	case of filesystems mounted async.
Fix a panic with busy pages when write clustering is done for non-VMIO
	buffers.

1 files changed, 11 insertions, 18 deletions

diff --git a/sys/kern/imgact_aout.c b/sys/kern/imgact_aout.c
index 3c7a007..2bfc188 100644
--- a/sys/kern/imgact_aout.c
+++ b/sys/kern/imgact_aout.c
@@ -28,7 +28,7 @@
  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  * SUCH DAMAGE.
  *
- *	$Id: imgact_aout.c,v 1.20 1995/12/11 04:56:00 dyson Exp $
+ *	$Id: imgact_aout.c,v 1.21 1995/12/15 02:57:40 peter Exp $
  */
 
 #include <sys/param.h>
@@ -148,15 +148,15 @@ exec_aout_imgact(imgp)
 	exec_new_vmspace(imgp);
 
 	/*
-	 * Map text read/execute
+	 * Map text/data read/execute
 	 */
 	vmaddr = virtual_offset;
 	error =
 	    vm_mmap(&vmspace->vm_map,			/* map */
 		&vmaddr,				/* address */
-		a_out->a_text,				/* size */
+		a_out->a_text + a_out->a_data,		/* size */
 		VM_PROT_READ | VM_PROT_EXECUTE,		/* protection */
-		VM_PROT_READ | VM_PROT_EXECUTE | VM_PROT_WRITE,	/* max protection */
+		VM_PROT_ALL,				/* max protection */
 		MAP_PRIVATE | MAP_FIXED,		/* flags */
 		(caddr_t)imgp->vp,			/* vnode */
 		file_offset);				/* offset */
@@ -164,20 +164,13 @@ exec_aout_imgact(imgp)
 		return (error);
 
 	/*
-	 * Map data read/write (if text is 0, assume text is in data area
-	 *	[Bill's screwball mode])
+	 * allow writing of data
 	 */
-	vmaddr = virtual_offset + a_out->a_text;
-	error =
-	    vm_mmap(&vmspace->vm_map,
-		&vmaddr,
-		a_out->a_data,
-		VM_PROT_READ | VM_PROT_WRITE | (a_out->a_text ? 0 : VM_PROT_EXECUTE),
-		VM_PROT_ALL, MAP_PRIVATE | MAP_FIXED,
-		(caddr_t) imgp->vp,
-		file_offset + a_out->a_text);
-	if (error)
-		return (error);
+	vm_map_protect(&vmspace->vm_map,
+		vmaddr + a_out->a_text,
+		vmaddr + a_out->a_text + a_out->a_data,
+		VM_PROT_ALL,
+		FALSE);
 
 	if (bss_size != 0) {
 		/*
@@ -186,7 +179,7 @@ exec_aout_imgact(imgp)
 		 *	instruction of the same name.
 		 */
 		vmaddr = virtual_offset + a_out->a_text + a_out->a_data;
-		error = vm_map_find(&vmspace->vm_map, NULL, 0, &vmaddr, bss_size, FALSE);
+		error = vm_map_find(&vmspace->vm_map, NULL, 0, &vmaddr, bss_size, FALSE, VM_PROT_ALL, VM_PROT_ALL, 0);
 		if (error)
 			return (error);
 	}