linux-kernel - Re: [PATCH] ACPI/NVS: Not save NVS region for new machines to accelerate S3

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: <20140718080056.GA2037@gchen.bj.intel.com>
Date:	Fri, 18 Jul 2014 04:00:56 -0400
From:	"Chen, Gong" <gong.chen@...ux.intel.com>
To:	Lan Tianyu <tianyu.lan@...el.com>
Cc:	rjw@...ysocki.net, lenb@...nel.org, linux-acpi@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ACPI/NVS: Not save NVS region for new machines to
 accelerate S3

On Fri, Jul 18, 2014 at 01:55:22PM +0800, Lan Tianyu wrote:
> Date:	Fri, 18 Jul 2014 13:55:22 +0800
> From: Lan Tianyu <tianyu.lan@...el.com>
> To: rjw@...ysocki.net, lenb@...nel.org
> Cc: Lan Tianyu <tianyu.lan@...el.com>, linux-acpi@...r.kernel.org,
>  linux-kernel@...r.kernel.org
> Subject: [PATCH] ACPI/NVS: Not save NVS region for new machines to
>  accelerate S3
> X-Mailer: git-send-email 1.7.9.5
> 
> NVS region is saved and restored unconditionally for machines without
> nvs_nosave quirk during S3. Tested some new machines and the operation
> is not necessary. Saving NVS region also affects S2RAM speed. The time of
> NVS saving and restoring depends on the size of NVS region and it consumes
> 7~10ms normally.
> 
> This patch is to make machines produced from 2012 to now not saving NVS region
> to accelerate S3.
> 
The year 2012 is a mandatory value in the spec?

Download attachment "signature.asc" of type "application/pgp-signature" (820 bytes)