Hi!
> Make hibernation_platform_enter() execute the enter-a-sleep-state sequence
> instead of the mixed shutdown-with-entering-S4 thing.
>
> Replace the shutting down of devices done by kernel_shutdown_prepare(), before
> entering the ACPI S4 sleep state, with suspending them and the shutting down
> of
> sysdevs with calling device_power_down(PMSG_SUSPEND) (just like before
> entering
> S1 or S3, but the target state is now S4). Also, disable the nonboot CPUs
> before entering the sleep state (S4), which generally always is a good idea.
>
> This is known to fix the "double disk spin down during hibernation" on some
> machines, eg. HPC nx6325 (ref. http://lkml.org/lkml/2007/8/7/316 and the
> following thread). It also generally causes the hibernation state (ACPI S4)
> to
> be entered faster.
>
> Signed-off-by: Rafael J. Wysocki <[EMAIL PROTECTED]>
> ---
> kernel/power/disk.c | 55
> ++++++++++++++++++++++++++++++++++++++--------------
> 1 file changed, 41 insertions(+), 14 deletions(-)
>
> + local_irq_disable();
> + error = device_power_down(PMSG_SUSPEND);
> + if (!error) {
> + error = hibernation_ops->enter();
> + /* We should never get here */
Are you sure it is good idea to enable interrupts/power up devices
when this happens? AFAICT image is already on disk an intact at this
point, safe thing to do is while(1);...
Pavel
--
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures)
http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
-
To unsubscribe from this list: send the line "unsubscribe linux-acpi" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
