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 <rjw@xxxxxxx> > --- > 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 _______________________________________________ linux-pm mailing list linux-pm@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/linux-pm
