From: Viresh Kumar <viresh.kumar@linaro.org>
To: Doug Smythies <doug.smythies@gmail.com>
Cc: rjw@rjwysocki.net, joel@joelfernandes.org,
linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
dsmythies@telus.net
Subject: Re: [PATCH] Revert "cpufreq: schedutil: Don't set next_freq to UINT_MAX"
Date: Thu, 18 Jul 2019 15:58:15 +0530 [thread overview]
Message-ID: <20190718102815.utl3hanfc7fpf2i6@vireshk-i7> (raw)
In-Reply-To: <1563431200-3042-1-git-send-email-dsmythies@telus.net>
On 17-07-19, 23:26, Doug Smythies wrote:
> This reverts commit ecd2884291261e3fddbc7651ee11a20d596bb514.
>
> The commit caused a regression whereby reducing the maximum
> CPU clock frequency is ineffective while busy, and the CPU
> clock remains unchanged. Once the system has experienced
> some idle time, the new limit is implemented.
Can you explain why this patch caused that issue ? I am sorry but I couldn't
understand it from your email. How are we trying to reduce the frequency? Is
clk_set_rate() getting called with that finally and not working ?
> A consequence is that any thermal throttling monitoring
> and control based on max freq limits fail to respond
> in a timely manor, if at all, to a thermal temperature
> trip on a busy system.
--
viresh
next prev parent reply other threads:[~2019-07-18 10:28 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-18 6:26 [PATCH] Revert "cpufreq: schedutil: Don't set next_freq to UINT_MAX" Doug Smythies
2019-07-18 10:28 ` Viresh Kumar [this message]
2019-07-18 15:46 ` Doug Smythies
2019-07-22 6:49 ` Viresh Kumar
2019-07-22 6:51 ` [PATCH] cpufreq: schedutil: Don't skip freq update when limits change Viresh Kumar
2019-07-23 7:10 ` Doug Smythies
2019-07-23 9:13 ` Rafael J. Wysocki
2019-07-23 9:15 ` Viresh Kumar
2019-07-23 10:27 ` Rafael J. Wysocki
2019-07-24 11:43 ` Viresh Kumar
2019-07-25 15:20 ` Doug Smythies
2019-07-26 3:26 ` Viresh Kumar
2019-07-26 6:57 ` Viresh Kumar
2019-07-29 7:55 ` Doug Smythies
2019-07-29 8:32 ` Viresh Kumar
2019-07-29 8:37 ` Rafael J. Wysocki
2019-08-01 0:20 ` Doug Smythies
2019-08-01 6:17 ` Viresh Kumar
2019-08-01 7:47 ` Rafael J. Wysocki
2019-08-01 7:55 ` Viresh Kumar
2019-08-01 17:57 ` Doug Smythies
2019-08-02 3:48 ` Viresh Kumar
2019-08-02 9:11 ` Rafael J. Wysocki
2019-08-02 9:19 ` Rafael J. Wysocki
2019-08-06 4:00 ` Viresh Kumar
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