diff -ur /usr/src/sys/vm/vnode_pager.c src/sys/vm/vnode_pager.c
--- /usr/src/sys/vm/vnode_pager.c	Thu May 19 05:53:07 2005
+++ src/sys/vm/vnode_pager.c	Tue Aug  9 00:54:17 2005
@@ -65,6 +65,8 @@
 #include <sys/conf.h>
 #include <sys/sf_buf.h>
 
+#include <machine/atomic.h>
+
 #include <vm/vm.h>
 #include <vm/vm_object.h>
 #include <vm/vm_page.h>
@@ -546,7 +548,7 @@
 			bp->b_bcount = bsize;
 			bp->b_bufsize = bsize;
 			bp->b_runningbufspace = bp->b_bufsize;
-			runningbufspace += bp->b_runningbufspace;
+			atomic_add_int(&runningbufspace, bp->b_runningbufspace);
 
 			/* do the input */
 			bp->b_iooffset = dbtob(bp->b_blkno);
@@ -898,7 +900,7 @@
 	bp->b_bcount = size;
 	bp->b_bufsize = size;
 	bp->b_runningbufspace = bp->b_bufsize;
-	runningbufspace += bp->b_runningbufspace;
+	atomic_add_int(&runningbufspace, bp->b_runningbufspace);
 
 	cnt.v_vnodein++;
 	cnt.v_vnodepgsin += count;
Only in src/sys/vm: vnode_pager.c.orig
Only in src/sys/vm: vnode_pager.c.rej.orig