diff -urN lowlat-ref/arch/i386/lib/usercopy.c lowlat/arch/i386/lib/usercopy.c
--- lowlat-ref/arch/i386/lib/usercopy.c	Thu Sep 14 02:04:52 2000
+++ lowlat/arch/i386/lib/usercopy.c	Thu Sep 14 02:11:03 2000
@@ -54,6 +54,7 @@
 		  "=&D" (__d2)						   \
 		: "i"(-EFAULT), "0"(count), "1"(count), "3"(src), "4"(dst) \
 		: "memory");						   \
+	conditional_schedule();						   \
 } while (0)
 
 long
@@ -97,6 +98,7 @@
 		".previous"						\
 		: "=&c"(size), "=&D" (__d0)				\
 		: "r"(size & 3), "0"(size / 4), "1"(addr), "a"(0));	\
+	conditional_schedule();						\
 } while (0)
 
 unsigned long
@@ -143,5 +145,6 @@
 		:"=r" (n), "=D" (s), "=a" (res), "=c" (tmp)
 		:"0" (n), "1" (s), "2" (0), "3" (mask)
 		:"cc");
+	conditional_schedule();
 	return res & mask;
 }
diff -urN lowlat-ref/include/asm-i386/uaccess.h lowlat/include/asm-i386/uaccess.h
--- lowlat-ref/include/asm-i386/uaccess.h	Thu Sep 14 02:04:52 2000
+++ lowlat/include/asm-i386/uaccess.h	Thu Sep 14 01:45:01 2000
@@ -6,6 +6,7 @@
  */
 #include <linux/config.h>
 #include <linux/sched.h>
+#include <linux/condsched.h>
 #include <asm/page.h>
 
 #define VERIFY_READ 0
@@ -270,6 +271,7 @@
 		: "=&c"(size), "=&D" (__d0), "=&S" (__d1)		\
 		: "r"(size & 3), "0"(size / 4), "1"(to), "2"(from)	\
 		: "memory");						\
+	conditional_schedule();						\
 } while (0)
 
 #define __copy_user_zeroing(to,from,size)				\
@@ -298,6 +300,7 @@
 		: "=&c"(size), "=&D" (__d0), "=&S" (__d1)		\
 		: "r"(size & 3), "0"(size / 4), "1"(to), "2"(from)	\
 		: "memory");						\
+	conditional_schedule();						\
 } while (0)
 
 /* We let the __ versions of copy_from/to_user inline, because they're often
@@ -338,6 +341,7 @@
 			: "=c"(size), "=&S" (__d0), "=&D" (__d1)\
 			: "1"(from), "2"(to), "0"(size/4)	\
 			: "memory");				\
+		conditional_schedule();				\
 		break;						\
 	case 1:							\
 		__asm__ __volatile__(				\
@@ -428,6 +432,7 @@
 			: "=c"(size), "=&S" (__d0), "=&D" (__d1)\
 			: "1"(from), "2"(to), "0"(size/4)	\
 			: "memory");				\
+		conditional_schedule();				\
 		break;						\
 	case 1:							\
 		__asm__ __volatile__(				\