X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=doc%2F44bsd.texi;h=4d61c17afb995b8daf753c6a57ad42f4d1419bf8;hb=17ecbdac5580a6406b0d6ec84fa17be1f4bb2507;hp=84ddf7f1e0df3036e074aec6c4f832cbf3e98dac;hpb=615bf3b3d2a8573ed6fb9ddc0055745e163ac999;p=pintos-anon

diff --git a/doc/44bsd.texi b/doc/44bsd.texi
index 84ddf7f..4d61c17 100644
--- a/doc/44bsd.texi
+++ b/doc/44bsd.texi
@@ -64,13 +64,14 @@ they run in ``round robin'' order.
 @section Niceness
 
 Thread priority is dynamically determined by the scheduler using a
-formula given below.  However, each thread also has a relatively static
-@dfn{nice} value between -20 and 20 that determines how ``nice'' the
-thread should be to other threads.  A @var{nice} of zero does not affect
-thread priority.  A positive @var{nice} increases the numeric priority
-of a thread, decreasing its effective priority, and causes it to give up
-some CPU time it would otherwise receive.  On the other hand, a negative
-@var{nice} tends to take away CPU time from other threads.
+formula given below.  However, each thread also has an integer
+@dfn{nice} value that determines how ``nice'' the thread should be to
+other threads.  A @var{nice} of zero does not affect thread priority.  A
+positive @var{nice}, to the maximum of 20, increases the numeric
+priority of a thread, decreasing its effective priority, and causes it
+to give up some CPU time it would otherwise receive.  On the other hand,
+a negative @var{nice}, to the minimum of -20, tends to take away CPU
+time from other threads.
 
 The initial thread starts with a @var{nice} value of zero.  Other
 threads start with a @var{nice} value inherited from their parent
@@ -313,7 +314,7 @@ q}:
 @tab @code{n * f}
 
 @item Convert @code{x} to integer (rounding down):
-@tab @code{x * f}
+@tab @code{x / f}
 
 @item Convert @code{x} to integer (rounding to nearest):
 @tab @code{(x + f / 2) / f}