lkml.org 
[lkml]   [2003]   [Aug]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
SubjectRe: time jumps (again)
> Some days ago I started noticing strange time jumps on my Athlon system.
> (Asus board, VIA chipset, AMD Athlon 650MHz processor). I haven't
> noticed them before and I am pretty sure there weren't any for the last
> few years! Uptime of the machine is now 218 days, and problems began
> appearing after 215 days approximately.
>
> What happens: when doing a
> $ while true; do date; done
> I'm noticing time jumps _exactly_ at the beginning of a "new" second (or
> at the end of an "old" one). the jump is exactly 4294 (4295) seconds
> into the future. Example:
> ...
> Mon Aug 4 18:11:06 CEST 2003
> Mon Aug 4 18:11:06 CEST 2003
> Mon Aug 4 19:22:41 CEST 2003
> Mon Aug 4 19:22:41 CEST 2003
> Mon Aug 4 19:22:41 CEST 2003
> Mon Aug 4 18:11:07 CEST 2003
> Mon Aug 4 18:11:07 CEST 2003
> ...
>

Wild guess - does the following patch fix it?

Tim


--- linux-2.4.20/arch/i386/kernel/time.c.orig Mon Aug 4 23:38:47 2003
+++ linux-2.4.20/arch/i386/kernel/time.c Mon Aug 4 23:40:53 2003
@@ -274,8 +274,8 @@
read_lock_irqsave(&xtime_lock, flags);
usec = do_gettimeoffset();
{
- unsigned long lost = jiffies - wall_jiffies;
- if (lost)
+ long lost = jiffies - wall_jiffies;
+ if (lost>0)
usec += lost * (1000000 / HZ);
}
sec = xtime.tv_sec;
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:47    [W:0.059 / U:2.672 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site