From: "John W. Linville" <linville@tuxdriver.com>
To: Mohammed Shafi Shajakhan <mshajakhan@atheros.com>
Cc: linux-wireless@vger.kernel.org, lrodriguez@atheros.com
Subject: Re: [RFC] ath9k: Fix ath9k prevents CPU to enter C3 states
Date: Wed, 9 Feb 2011 09:42:26 -0500 [thread overview]
Message-ID: <20110209144225.GC2494@tuxdriver.com> (raw)
In-Reply-To: <1297262007-15128-1-git-send-email-mshajakhan@atheros.com>
On Wed, Feb 09, 2011 at 08:03:27PM +0530, Mohammed Shafi Shajakhan wrote:
> From: Mohammed Shafi Shajakhan <mshajakhan@atheros.com>
>
> The DMA latency issue is observed only in Intel pinetrail platforms but
> in the driver we had a default PM-QOS value of 55. This caused
> unnecessary power consumption and battery drain in other platforms.
> Address this issue by disabling PM-QOS by default by setting it's value
> as '0' and making code changes appropriately.This addresses the bug:
> https://bugzilla.kernel.org/show_bug.cgi?id=27532
> If the user sees some DMA latency issue he can still use the pmqos as a
> module parameter to trade power for throughput as below:
> sudo modprobe ath9k pmqos=55
>
> Signed-off-by: Mohammed Shafi Shajakhan <mshajakhan@atheros.com>
Seems a bit unclear to me -- if you have ath9k_pm_qos_value then why
use ATH9K_PM_QOS_DEFAULT_VALUE at all?
John
--
John W. Linville Someday the world will need a hero, and you
linville@tuxdriver.com might be all we have. Be ready.
next prev parent reply other threads:[~2011-02-09 14:45 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-09 14:33 [RFC] ath9k: Fix ath9k prevents CPU to enter C3 states Mohammed Shafi Shajakhan
2011-02-09 14:42 ` John W. Linville [this message]
2011-02-09 14:50 ` Mohammed Shafi
2011-02-09 16:48 ` Richard Schütz
2011-02-10 14:19 ` Mohammed Shafi
2011-02-10 17:41 ` Luis R. Rodriguez
2011-02-10 17:44 ` Richard Schütz
2011-02-11 13:31 ` Richard Schütz
2011-02-09 19:58 ` Luis R. Rodriguez
2011-02-10 14:18 ` Mohammed Shafi
-- strict thread matches above, loose matches on Subject: below --
2011-02-15 15:59 Mohammed Shafi Shajakhan
2011-02-15 16:12 ` John W. Linville
2011-02-16 5:05 ` Mohammed Shafi
2011-03-04 6:06 ` Mohammed Shafi
2011-03-04 13:37 ` John W. Linville
2011-03-04 14:26 ` Mohammed Shafi
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