On 2014年07月23日 07:40, Rafael J. Wysocki wrote:
> On Friday, July 18, 2014 01:55:22 PM Lan Tianyu wrote:
>> 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: Lan Tianyu <tianyu.lan@xxxxxxxxx>
>> ---
>> drivers/acpi/sleep.c | 5 +++++
>> 1 file changed, 5 insertions(+)
>>
>> diff --git a/drivers/acpi/sleep.c b/drivers/acpi/sleep.c
>> index b3e3cc7..896d8be 100644
>> --- a/drivers/acpi/sleep.c
>> +++ b/drivers/acpi/sleep.c
>> @@ -322,7 +322,12 @@ static struct dmi_system_id acpisleep_dmi_table[] __initdata = {
>>
>> static void acpi_sleep_dmi_check(void)
>> {
>> + int year;
>> +
>> dmi_check_system(acpisleep_dmi_table);
>> +
>> + if (dmi_get_date(DMI_BIOS_DATE, &year, NULL, NULL) && year >= 2012)
>> + acpi_nvs_nosave_s3();
>
> I'd prefer the ordering here to be different so that individual quirks
> could be used to change the date-based wholesale behavior.
Ok. I will update soon.
>
>> }
>>
>> /**
>>
>
--
Best regards
Tianyu Lan
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