svn commit: r245255 - head/sys/vm

[Andrey Zonov]

Author: zont
Date: Thu Jan 10 12:43:58 2013
New Revision: 245255
URL: http://svnweb.freebsd.org/changeset/base/245255

Log:
  - Reduce kernel size by removing unnecessary pointer indirections.
  
  GENERIC kernel size reduced in 16 bytes and RACCT kernel in 336 bytes.
  
  Suggested by:	alc
  Reviewed by:	alc
  Approved by:	kib (mentor)
  MFC after:	1 week

Modified:
  head/sys/vm/vm_map.c
  head/sys/vm/vm_mmap.c
  head/sys/vm/vm_unix.c

Modified: head/sys/vm/vm_map.c
==============================================================================
--- head/sys/vm/vm_map.c	Thu Jan 10 12:30:58 2013	(r245254)
+++ head/sys/vm/vm_map.c	Thu Jan 10 12:43:58 2013	(r245255)
@@ -3281,8 +3281,7 @@ vm_map_stack(vm_map_t map, vm_offset_t a
 	}
 
 	if (!old_mlock && map->flags & MAP_WIREFUTURE) {
-		if (ptoa(vmspace_wired_count(curproc->p_vmspace)) +
-		    init_ssize > lmemlim) {
+		if (ptoa(pmap_wired_count(map->pmap)) + init_ssize > lmemlim) {
 			vm_map_unlock(map);
 			return (KERN_NO_SPACE);
 		}
@@ -3505,8 +3504,7 @@ Retry:
 		grow_amount = limit - ctob(vm->vm_ssize);
 #endif
 	if (!old_mlock && map->flags & MAP_WIREFUTURE) {
-		if (ptoa(vmspace_wired_count(p->p_vmspace)) + grow_amount >
-		    lmemlim) {
+		if (ptoa(pmap_wired_count(map->pmap)) + grow_amount > lmemlim) {
 			vm_map_unlock_read(map);
 			rv = KERN_NO_SPACE;
 			goto out;
@@ -3514,7 +3512,7 @@ Retry:
 #ifdef RACCT
 		PROC_LOCK(p);
 		if (racct_set(p, RACCT_MEMLOCK,
-		    ptoa(vmspace_wired_count(p->p_vmspace)) + grow_amount)) {
+		    ptoa(pmap_wired_count(map->pmap)) + grow_amount)) {
 			PROC_UNLOCK(p);
 			vm_map_unlock_read(map);
 			rv = KERN_NO_SPACE;
@@ -3645,7 +3643,7 @@ out:
 		KASSERT(error == 0, ("decreasing RACCT_VMEM failed"));
 		if (!old_mlock) {
 			error = racct_set(p, RACCT_MEMLOCK,
-			    ptoa(vmspace_wired_count(p->p_vmspace)));
+			    ptoa(pmap_wired_count(map->pmap)));
 			KASSERT(error == 0, ("decreasing RACCT_MEMLOCK failed"));
 		}
 	    	error = racct_set(p, RACCT_STACK, ctob(vm->vm_ssize));

Modified: head/sys/vm/vm_mmap.c
==============================================================================
--- head/sys/vm/vm_mmap.c	Thu Jan 10 12:30:58 2013	(r245254)
+++ head/sys/vm/vm_mmap.c	Thu Jan 10 12:43:58 2013	(r245255)
@@ -1038,6 +1038,7 @@ sys_mlock(td, uap)
 	struct proc *proc;
 	vm_offset_t addr, end, last, start;
 	vm_size_t npages, size;
+	vm_map_t map;
 	unsigned long nsize;
 	int error;
 
@@ -1055,8 +1056,9 @@ sys_mlock(td, uap)
 	if (npages > vm_page_max_wired)
 		return (ENOMEM);
 	proc = td->td_proc;
+	map = &proc->p_vmspace->vm_map;
 	PROC_LOCK(proc);
-	nsize = ptoa(npages + vmspace_wired_count(proc->p_vmspace));
+	nsize = ptoa(npages + pmap_wired_count(map->pmap));
 	if (nsize > lim_cur(proc, RLIMIT_MEMLOCK)) {
 		PROC_UNLOCK(proc);
 		return (ENOMEM);
@@ -1071,13 +1073,13 @@ sys_mlock(td, uap)
 	if (error != 0)
 		return (ENOMEM);
 #endif
-	error = vm_map_wire(&proc->p_vmspace->vm_map, start, end,
+	error = vm_map_wire(map, start, end,
 	    VM_MAP_WIRE_USER | VM_MAP_WIRE_NOHOLES);
 #ifdef RACCT
 	if (error != KERN_SUCCESS) {
 		PROC_LOCK(proc);
 		racct_set(proc, RACCT_MEMLOCK,
-		    ptoa(vmspace_wired_count(proc->p_vmspace)));
+		    ptoa(pmap_wired_count(map->pmap)));
 		PROC_UNLOCK(proc);
 	}
 #endif
@@ -1151,7 +1153,7 @@ sys_mlockall(td, uap)
 	if (error != KERN_SUCCESS) {
 		PROC_LOCK(td->td_proc);
 		racct_set(td->td_proc, RACCT_MEMLOCK,
-		    ptoa(vmspace_wired_count(td->td_proc->p_vmspace)));
+		    ptoa(pmap_wired_count(map->pmap)));
 		PROC_UNLOCK(td->td_proc);
 	}
 #endif
@@ -1485,16 +1487,15 @@ vm_mmap(vm_map_t map, vm_offset_t *addr,
 			return (ENOMEM);
 		}
 		if (!old_mlock && map->flags & MAP_WIREFUTURE) {
-			if (ptoa(vmspace_wired_count(td->td_proc->p_vmspace)) +
-			    size > lim_cur(td->td_proc, RLIMIT_MEMLOCK)) {
+			if (ptoa(pmap_wired_count(map->pmap)) + size >
+			    lim_cur(td->td_proc, RLIMIT_MEMLOCK)) {
 				racct_set_force(td->td_proc, RACCT_VMEM,
 				    map->size);
 				PROC_UNLOCK(td->td_proc);
 				return (ENOMEM);
 			}
 			error = racct_set(td->td_proc, RACCT_MEMLOCK,
-			    ptoa(vmspace_wired_count(td->td_proc->p_vmspace)) +
-			    size);
+			    ptoa(pmap_wired_count(map->pmap)) + size);
 			if (error != 0) {
 				racct_set_force(td->td_proc, RACCT_VMEM,
 				    map->size);

Modified: head/sys/vm/vm_unix.c
==============================================================================
--- head/sys/vm/vm_unix.c	Thu Jan 10 12:30:58 2013	(r245254)
+++ head/sys/vm/vm_unix.c	Thu Jan 10 12:43:58 2013	(r245255)
@@ -118,7 +118,7 @@ sys_obreak(td, uap)
 	}
 	if (new > old) {
 		if (!old_mlock && vm->vm_map.flags & MAP_WIREFUTURE) {
-			if (ptoa(vmspace_wired_count(td->td_proc->p_vmspace)) +
+			if (ptoa(pmap_wired_count(vm->vm_map.pmap)) +
 			    (new - old) > lmemlim) {
 				error = ENOMEM;
 				goto done;
@@ -146,7 +146,7 @@ sys_obreak(td, uap)
 		}
 		if (!old_mlock && vm->vm_map.flags & MAP_WIREFUTURE) {
 			error = racct_set(td->td_proc, RACCT_MEMLOCK,
-			    ptoa(vmspace_wired_count(td->td_proc->p_vmspace)) +
+			    ptoa(pmap_wired_count(vm->vm_map.pmap)) +
 			    (new - old));
 			if (error != 0) {
 				racct_set_force(td->td_proc, RACCT_DATA,
@@ -176,8 +176,7 @@ sys_obreak(td, uap)
 			racct_set_force(td->td_proc, RACCT_VMEM, vm->vm_map.size);
 			if (!old_mlock && vm->vm_map.flags & MAP_WIREFUTURE) {
 				racct_set_force(td->td_proc, RACCT_MEMLOCK,
-				    ptoa(vmspace_wired_count(
-				    td->td_proc->p_vmspace)));
+				    ptoa(pmap_wired_count(vm->vm_map.pmap)));
 			}
 			PROC_UNLOCK(td->td_proc);
 #endif
@@ -212,7 +211,7 @@ sys_obreak(td, uap)
 		racct_set_force(td->td_proc, RACCT_VMEM, vm->vm_map.size);
 		if (!old_mlock && vm->vm_map.flags & MAP_WIREFUTURE) {
 			racct_set_force(td->td_proc, RACCT_MEMLOCK,
-			    ptoa(vmspace_wired_count(td->td_proc->p_vmspace)));
+			    ptoa(pmap_wired_count(vm->vm_map.pmap)));
 		}
 		PROC_UNLOCK(td->td_proc);
 #endif