Re: [linux-usb-devel] [4/4] 2.6.23-rc3: known regressions

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



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);


-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [email protected]
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[Index of Archives]     [Kernel Newbies]     [Netfilter]     [Bugtraq]     [Photo]     [Stuff]     [Gimp]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Video 4 Linux]     [Linux for the blind]     [Linux Resources]
  Powered by Linux