Re: 2.6.17-mm2 hrtimer code wedges at boot?

[Roman Zippel <zippel@linux-m68k.org>]

Hi,

On Mon, 26 Jun 2006, Valdis.Kletnieks@vt.edu wrote:

> Which looks like a good place to get hung in a loop for a while....
> 
> Eventually (after about 2 minutes, it finally unwedges and continues on.
> 
> Any ideas?

Could you please try the patch below?
tv_nsec can shortly become negative, but its absolute value will always be 
smaller then the current nsec offset.

bye, Roman

---
 kernel/timer.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Index: linux-2.6-mm/kernel/timer.c
===================================================================
--- linux-2.6-mm.orig/kernel/timer.c	2006-06-27 11:59:19.000000000 +0200
+++ linux-2.6-mm/kernel/timer.c	2006-06-27 12:10:28.000000000 +0200
@@ -1129,7 +1129,7 @@ static void update_wall_time(void)
 	clocksource_adjust(clock, offset);
 
 	/* store full nanoseconds into xtime */
-	xtime.tv_nsec = clock->xtime_nsec >> clock->shift;
+	xtime.tv_nsec = (s64)clock->xtime_nsec >> clock->shift;
 	clock->xtime_nsec -= (s64)xtime.tv_nsec << clock->shift;
 
 	/* check to see if there is a new clocksource to use */
-
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