From: Ralf Baechle <ralf@linux-mips.org>
To: Jun Sun <jsun@mvista.com>
Cc: Kip Walker <kwalker@broadcom.com>, linux-mips@linux-mips.org
Subject: Re: [pathch] kernel/sched.c bogon?
Date: Mon, 10 Mar 2003 13:55:31 +0100 [thread overview]
Message-ID: <20030310135531.B2206@linux-mips.org> (raw)
In-Reply-To: <20030306174001.K26071@mvista.com>; from jsun@mvista.com on Thu, Mar 06, 2003 at 05:40:01PM -0800
On Thu, Mar 06, 2003 at 05:40:01PM -0800, Jun Sun wrote:
> I reported this bug last May. Apparently it is still not
> taken up-stream. Ralf, why don't we fix it here and push
> it up from you?
>
> BTW, this bug actually has effect on real-time performance under
> preemptible kernel.
< = 2.4.x preemptible kernel is OPP.
> It can delay the execution of the highest
> priority real-time process from execution up to 1 jiffy.
Quite a number of users get_cycles() in the kernel assume it to return a
64-bit number. I guess we'll have to fake a 64-bit counter in software ...
Ralf
next prev parent reply other threads:[~2003-03-10 13:07 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-03-07 1:01 [pathch] kernel/sched.c bogon? Kip Walker
2003-03-07 1:40 ` Jun Sun
2003-03-10 12:55 ` Ralf Baechle [this message]
2003-03-10 17:59 ` Jun Sun
2003-04-24 17:03 ` Kip Walker
2003-04-25 15:28 ` Kip Walker
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