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From: Oleg Drokin <green@namesys.com>
To: Tim Schmielau <tim@physik3.uni-rostock.de>
Cc: lkml <linux-kernel@vger.kernel.org>,
	torvalds@transmeta.com, jdike@karaya.com
Subject: use 64 bit jiffies broke HZ=100 case (and fix)
Date: Wed, 5 Feb 2003 14:42:06 +0300	[thread overview]
Message-ID: <20030205144206.A25320@namesys.com> (raw)
In-Reply-To: <Pine.LNX.4.33.0302022347440.24857-100000@gans.physik3.uni-rostock.de>

Hello!

On Sun, Feb 02, 2003 at 11:55:40PM +0100, Tim Schmielau wrote:
> Just a note that I have rediffed for 2.5.55 the patches that use the 64
> bit jiffies value to avoid uptime and process start time wrap after
> 49.5 days. I will push them Linus-wards when he's back.
> They can be retrieved from
>   http://www.physik3.uni-rostock.de/tim/kernel/2.5/jiffies64-33a.patch.gz
>     (1/3: infrastructure)
>   http://www.physik3.uni-rostock.de/tim/kernel/2.5/jiffies64-33b.patch.gz
>     (2/3: fix uptime wrap)
>   http://www.physik3.uni-rostock.de/tim/kernel/2.5/jiffies64-33c.patch.gz
>     (3/3: 64 bit process start time)

Unfortunatelly your changes in fs/proc/proc_misc.c broke every arch that
still uses HZ=100 (e.g. UML), because there is no "times" field in task
struct.
See this part:

+       {
+               unsigned long idle = init_task.times.tms_utime
+                                    + init_task.times.tms_stime;

In order to get UML to compile again (and pretty much any other HZ=100 arch)
I need to apply this patch below:

===== fs/proc/proc_misc.c 1.63 vs edited =====
--- 1.63/fs/proc/proc_misc.c	Tue Nov 12 12:37:55 2002
+++ edited/fs/proc/proc_misc.c	Wed Feb  5 14:28:50 2003
@@ -121,8 +121,7 @@
 	}
 #else
 	{
-		unsigned long idle = init_task.times.tms_utime
-		                     + init_task.times.tms_stime;
+		unsigned long idle = init_task.utime + init_task.stime;
 
 		len = sprintf(page,"%lu.%02lu %lu.%02lu\n",
 			(unsigned long) uptime,

Bye,
    Oleg

  parent reply	other threads:[~2003-02-05 11:32 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2003-02-02 22:55 [PATCH *] use 64 bit jiffies Tim Schmielau
2003-02-03  6:42 ` Denis Vlasenko
2003-02-03  8:28   ` Matti Aarnio
2003-02-03  8:47     ` Tim Schmielau
2003-02-03  8:55       ` Matti Aarnio
2003-02-04 13:00         ` Tim Schmielau
2003-02-04  6:41     ` Denis Vlasenko
2003-02-04  8:27       ` Robert de Bath
2003-02-04  8:41         ` Denis Vlasenko
2003-02-04  9:29       ` Jörn Engel
2003-02-04 13:04         ` Tim Schmielau
2003-02-17 13:55           ` Jörn Engel
2003-02-17 14:02             ` Tim Schmielau
2003-02-17 14:15             ` Matti Aarnio
2003-02-17 14:23               ` Tim Schmielau
2003-02-04 17:37       ` Randy.Dunlap
2003-02-16  1:37         ` [PATCH] make jiffies wrap 5 min after boot Tim Schmielau
2003-02-16  2:08           ` Anton Blanchard
2003-02-16  2:43             ` William Lee Irwin III
2003-02-16  2:50               ` Michael Vergoz
2003-02-16  6:37               ` Robert Love
2003-02-16  7:16                 ` Muli Ben-Yehuda
2003-02-16 11:50                   ` Falk Hueffner
2003-02-16 12:04                     ` William Lee Irwin III
2003-02-11 20:50       ` [patch] jiffies wrap fixes for 2.5.60 Tim Schmielau
2003-02-11 21:31         ` Roger Larsson
2003-02-12 12:09           ` Tim Schmielau
2003-02-05 11:42 ` Oleg Drokin [this message]
2003-02-05 12:22   ` use 64 bit jiffies broke HZ=100 case (and fix) Tim Schmielau

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