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
| ||
|
Message-ID: <47202AF3.8050001@pobox.com>
Date: Thu, 25 Oct 2007 01:34:43 -0400
From: Jeff Garzik <jgarzik@...ox.com>
To: Kristen Carlson Accardi <kristen.c.accardi@...el.com>
CC: linux-ide@...r.kernel.org, linux-kernel@...r.kernel.org,
axboe@...nel.dk, akpm@...ux-foundation.org
Subject: Re: [patch 2/2] Enable Aggressive Link Power management for AHCI
controllers.
Kristen Carlson Accardi wrote:
> This patch will set the correct bits to turn on Aggressive
> Link Power Management (ALPM) for the ahci driver. This
> will cause the controller and disk to negotiate a lower
> power state for the link when there is no activity (see
> the AHCI 1.x spec for details). This feature is mutually
> exclusive with Hot Plug, so when ALPM is enabled, Hot Plug
> is disabled. ALPM will be enabled by default, but it is
> settable via the scsi host syfs interface. Possible
> settings for this feature are:
>
> Setting Effect
> ----------------------------------------------------------
> min_power ALPM is enabled, and link set to enter
> lowest power state (SLUMBER) when idle
> Hot plug not allowed.
>
> max_performance ALPM is disabled, Hot Plug is allowed
>
> medium_power ALPM is enabled, and link set to enter
> second lowest power state (PARTIAL) when
> idle. Hot plug not allowed.
>
> Signed-off-by: Kristen Carlson Accardi <kristen.c.accardi@...el.com>
applied, with minor changes (attached)
Please check libata-dev.git#alpm and make sure it still works as
expected (after it mirrors out to git.kernel.org)
View attachment "patch" of type "text/plain" (8654 bytes)
Powered by blists - more mailing lists