linux-kernel - Re: [PATCH] ARM: twd: Adjust localtimer frequency with cpufreq notifiers

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 for Android: free password hash cracker in your pocket

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

Message-ID: <AANLkTimCuV5N0jr8c949uONEvieQ5MDZ9KHDXtneG5AT@mail.gmail.com>
Date:	Fri, 4 Mar 2011 11:17:08 +0100
From:	Linus Walleij <linus.ml.walleij@...il.com>
To:	Colin Cross <ccross@...roid.com>
Cc:	linux-arm-kernel@...ts-infradead.org,
	Harald Gustafsson <harald.gustafsson@...csson.com>,
	Rickard ANDERSSON <Rickard.Andersson@...ricsson.com>,
	Rob Herring <robherring2@...il.com>,
	Russell King <linux@....linux.org.uk>,
	srinidhi kasagar <srinidhi.kasagar@...ricsson.com>,
	Varun Swara <Varun.Swara@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Martin Persson <martin.persson@...ricsson.com>
Subject: Re: [PATCH] ARM: twd: Adjust localtimer frequency with cpufreq notifiers

2010/11/18 Colin Cross <ccross@...roid.com>:

> The clock to the ARM TWD local timer scales with the cpu
> frequency. To allow the cpu frequency to change while
> maintaining a constant TWD frequency, pick a lower target
> frequency for the TWD and use the prescaler to divide down
> to the closest lower frequency.

We are using this with some custom hooks for the U8500.

Tested-by: Linus Walleij <linus.walleij@...aro.org>

Martin Persson can probably provide an additional Tested-by
from ST-Ericsson if it helps.

Colin are you merging this patch for 2.6.39 through
Russells tracker or pull request? It's an important patch
for us.

Yours,
Linus Walleij
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/