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From: Davide Italiano <davide@FreeBSD.org>
Date: Wed, 12 Dec 2012 12:24:54 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-projects@freebsd.org
Subject: svn commit: r244149 - projects/calloutng/sys/kern
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Author: davide
Date: Wed Dec 12 12:24:54 2012
New Revision: 244149
URL: http://svnweb.freebsd.org/changeset/base/244149

Log:
  Precision-calculation code for old KPI doesn't work very well in case
  timeout is short.
  
  Suggested by:		mav

Modified:
  projects/calloutng/sys/kern/kern_timeout.c

Modified: projects/calloutng/sys/kern/kern_timeout.c
==============================================================================
--- projects/calloutng/sys/kern/kern_timeout.c	Wed Dec 12 12:14:05 2012	(r244148)
+++ projects/calloutng/sys/kern/kern_timeout.c	Wed Dec 12 12:24:54 2012	(r244149)
@@ -939,7 +939,10 @@ _callout_reset_on(struct callout *c, str
 			bintime_mul(&to_bt, to_ticks);
 		bintime_add(&to_bt, &now);
 		to_ticks >>= C_PRELGET(flags);
-		bintime_mul(&pr, to_ticks);
+		if (to_ticks == 0)
+			pr = halftick_bt;
+		else
+			bintime_mul(&pr, to_ticks);
 	} else { 
 		to_bt = *bt;
 		if (precision != NULL)