linux-kernel - regression caused by 08f511fd41c3 ("cpufreq: Reduce cpufreq_update

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-next>] [day] [month] [year] [list]

Message-ID: <20160617163023.5bb374f8@xhacker>
Date:	Fri, 17 Jun 2016 16:30:23 +0800
From:	Jisheng Zhang <jszhang@...vell.com>
To:	<rjw@...ysocki.net>, <viresh.kumar@...aro.org>,
	<linux-pm@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: regression caused by 08f511fd41c3 ("cpufreq: Reduce
 cpufreq_update_util() overhead a bit")

Dear all,

I found one regression: In an idle system, wakeups/s (reported by powertop)
is increased a lot, e.g on a intel snb 4 core platform, the wakeup event
number is increased from 8 wakeups/s to 24 wakeup/s. bisect points to
this commit. I could send detailed bisect log if it's wanted.

Thanks,
Jisheng