linux-kernel - Re: [PATCH] cpufreq: flush any pending policy update work scheduled before freeing

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: <20191018082551.zz7hazgodwgzaas3@vireshk-i7>
Date:   Fri, 18 Oct 2019 13:55:51 +0530
From:   Viresh Kumar <viresh.kumar@...aro.org>
To:     "Rafael J. Wysocki" <rafael@...nel.org>
Cc:     Sudeep Holla <sudeep.holla@....com>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Linux PM <linux-pm@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] cpufreq: flush any pending policy update work scheduled
 before freeing

On 18-10-19, 10:19, Rafael J. Wysocki wrote:
> On Fri, Oct 18, 2019 at 10:03 AM Viresh Kumar <viresh.kumar@...aro.org> wrote:
> >
> > On 18-10-19, 09:32, Rafael J. Wysocki wrote:
> > > Well, the policy is going away, so the governor has been stopped for
> > > it already.  Even if the limit is updated, it will not be used anyway,
> > > so why bother with updating it?
> >
> > The hardware will be programmed to run on that frequency before the
> > policy exits,
> 
> How exactly?
> 
> The policy is inactive, so refresh_frequency_limits() won't even run
> cpufreq_set_policy() for it.

Ahh, yes. We won't change the frequency, this is all useless in that
case.

-- 
viresh