Commit 821d6f03 authored by Lan Tianyu's avatar Lan Tianyu Committed by Rafael J. Wysocki

ACPI / sleep: Do not save NVS for new machines to accelerate S3

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.
Signed-off-by: default avatarLan Tianyu <tianyu.lan@intel.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
parent 9a3c4145
......@@ -322,6 +322,11 @@ static struct dmi_system_id acpisleep_dmi_table[] __initdata = {
static void acpi_sleep_dmi_check(void)
{
int year;
if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year >= 2012)
acpi_nvs_nosave_s3();
dmi_check_system(acpisleep_dmi_table);
}
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment