From: Arjan van de Ven <arjan@infradead.org>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: David Brownell <david-b@pacbell.net>,
Michal Piotrowski <michal.k.k.piotrowski@gmail.com>,
linux-usb-devel@lists.sourceforge.net, Greg KH <gregkh@suse.de>,
LKML <linux-kernel@vger.kernel.org>,
"Stuart_Hayes@Dell.com" <Stuart_Hayes@dell.com>,
Andrew Morton <akpm@linux-foundation.org>,
Daniel Exner <dex@dragonslave.de>
Subject: Re: [linux-usb-devel] [4/4] 2.6.23-rc3: known regressions
Date: Mon, 20 Aug 2007 23:04:14 -0700 [thread overview]
Message-ID: <1187676254.2676.6.camel@laptopd505.fenrus.org> (raw)
In-Reply-To: <1187675488.2676.3.camel@laptopd505.fenrus.org>
On Mon, 2007-08-20 at 22:51 -0700, Arjan van de Ven wrote:
> and the C-state code will honor it. CPUFREQ doesn't honor it yet but
> that's easy to add..
untested patch to add this to cpufreq; this is probably a good idea in
general even if using the latency framework doesn't end up being used
for fixing this regression...
--- linux-2.6.23-rc2/drivers/cpufreq/cpufreq.c.org 2007-08-20 22:58:32.000000000 -0700
+++ linux-2.6.23-rc2/drivers/cpufreq/cpufreq.c 2007-08-20 23:02:21.000000000 -0700
@@ -1604,6 +1604,12 @@ static int __cpufreq_set_policy(struct c
if (ret)
goto error_out;
+
+ if (system_latency_constraint() < policy->cpuinfo.transition_latency) {
+ ret = -EINVAL;
+ goto error_out;
+ }
+
/* notification of the new policy */
blocking_notifier_call_chain(&cpufreq_policy_notifier_list,
CPUFREQ_NOTIFY, policy);
next prev parent reply other threads:[~2007-08-21 6:09 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <46C098FD.1030601@googlemail.com>
2007-08-13 17:59 ` [2/4] " Michal Piotrowski
2007-08-13 23:29 ` Luca Tettamanti
2007-08-14 6:37 ` Michal Piotrowski
2007-08-13 17:59 ` [3/4] " Michal Piotrowski
2007-08-14 22:09 ` Francois Romieu
2007-08-13 17:59 ` [4/4] " Michal Piotrowski
2007-08-21 1:41 ` [linux-usb-devel] " David Brownell
2007-08-21 2:02 ` Linus Torvalds
2007-08-21 4:02 ` David Brownell
2007-08-21 4:15 ` Linus Torvalds
2007-08-21 4:48 ` David Brownell
2007-08-21 5:31 ` Linus Torvalds
2007-08-21 5:51 ` Arjan van de Ven
2007-08-21 6:04 ` Arjan van de Ven [this message]
2007-08-21 6:26 ` Linus Torvalds
2007-08-21 6:28 ` Arjan van de Ven
2007-08-21 6:45 ` Linus Torvalds
2007-08-21 6:25 ` Linus Torvalds
2007-08-21 6:24 ` Arjan van de Ven
2007-08-21 6:03 ` Linus Torvalds
2007-08-21 6:34 ` David Brownell
2007-08-21 6:52 ` Linus Torvalds
2007-08-21 7:24 ` Linus Torvalds
2007-08-22 3:34 ` Linus Torvalds
2007-08-22 14:42 ` Stuart_Hayes
2007-08-22 18:41 ` Linus Torvalds
2007-08-22 20:41 ` Stuart_Hayes
2007-08-22 23:35 ` Junio C Hamano
2007-08-21 4:27 ` [linux-usb-devel] " David Brownell
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