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

From: Chen, Gong
Date: Fri Jul 18 2014 - 04:31:58 EST


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@xxxxxxxxx>
> To: rjw@xxxxxxxxxxxxx, lenb@xxxxxxxxxx
> Cc: Lan Tianyu <tianyu.lan@xxxxxxxxx>, linux-acpi@xxxxxxxxxxxxxxx,
> linux-kernel@xxxxxxxxxxxxxxx
> 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?

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