linux-kernel - Re: [PATCH V3 3/9] cpufreq: Cap the default transition delay value to 10 ms

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <20170816063431.GB24299@vireshk-i7>
Date:   Wed, 16 Aug 2017 12:04:31 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     Leonard Crestez <leonard.crestez@....com>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <kernel@...gutronix.de>,
        Fabio Estevam <fabio.estevam@....com>
Cc:     linux-pm@...r.kernel.org,
        Vincent Guittot <vincent.guittot@...aro.org>,
        linux@...inikbrodowski.net, linux-kernel@...r.kernel.org,
        Rafael Wysocki <rjw@...ysocki.net>
Subject: Re: [PATCH V3 3/9] cpufreq: Cap the default transition delay value
 to 10 ms

On 28-07-17, 10:58, Viresh Kumar wrote:
> At this point I really feel that this is a hardware specific problem
> and it was working by chance until now. And I am not sure if we
> shouldn't be stopping this patch from getting merged just because of
> that.
> 
> At least you can teach your distribution to go increase the sampling
> rate from userspace to make it all work.

Its been 3 weeks since my last email on this thread and no reply yet
from any of the IMX maintainers. Can someone please help here ?

@Shawn: Can you help debugging a bit here, to see what's get screwed
up due to this commit ? Its just that your platform isn't able to
change freq at 10 ms rate.

@Rafael: I am not sure, but should we be stopping this patch because
some hardware isn't able to change freq at 10ms interval and is just
faking the transition delay to start with ?

Maybe we get this merged again and the IMX guys can figure out what's
wrong on their platform and how to fix it ?

-- 
viresh