From: Sitsofe Wheeler <sitsofe@yahoo.com>
To: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>,
Steven Rostedt <rostedt@goodmis.org>, Ingo Molnar <mingo@elte.hu>,
linux-kernel@vger.kernel.org
Subject: Re: [TIP,BISECTED] Negative nice values have become big positive numbers
Date: Tue, 10 Mar 2009 00:12:22 +0000 [thread overview]
Message-ID: <20090310001222.GA1843@silver.sucs.org> (raw)
In-Reply-To: <20090309201503.GA5010@nowhere>
On Mon, Mar 09, 2009 at 09:15:04PM +0100, Frederic Weisbecker wrote:
> On Sun, Mar 08, 2009 at 11:18:50PM +0000, Sitsofe Wheeler wrote:
> > Formally negative nice values have started become very big in positive
> > integers in -tip kernels:
> >
> > 2 root 15 2147483647 0 0 0 S 0.0 0.0 0:00.00 kthreadd
>
> The weird thing here is that number: 2147483647
> It is 0xefffffff
> Which means -1 without the highest bit (the sign).
> I really don't know how it could have happened.
>
> Anyway, I caught something in the signedness bits from my patch that unifies
> the format decoding.
> I've never seen your bug on my machine. But I note you have a 32 bits CPU.
> Mine is 64 bits with a 64 bits kernel. Perhaps some weird signedness related things
> happened because of the signedness bug that the following patch fixes.
>
> Can you please give it a try?
This seems to have fixed the problem (unless I'm mistaken):
2 root 15 -5 0 0 0 S 0.0 0.0 0:00.00 kthreadd
Thanks!
--
Sitsofe | http://sucs.org/~sits/
next prev parent reply other threads:[~2009-03-10 0:12 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-08 23:18 [TIP,BISECTED] Negative nice values have become big positive numbers Sitsofe Wheeler
2009-03-08 23:49 ` Steven Rostedt
2009-03-09 7:08 ` Ingo Molnar
2009-03-09 8:41 ` Frederic Weisbecker
2009-03-09 12:56 ` Sitsofe Wheeler
2009-03-09 8:39 ` Sitsofe Wheeler
2009-03-09 20:15 ` Frederic Weisbecker
2009-03-10 0:12 ` Sitsofe Wheeler [this message]
2009-03-10 10:03 ` Frederic Weisbecker
2009-03-10 12:18 ` [tip:core/printk] vsprintf: fix bug in negative value printing Frederic Weisbecker
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