Re: [linux-pm] [RFC] Deferred disk spinup during system resume

Rafael J. Wysocki
2010-12-30T22:47:02Z

On Thursday, December 30, 2010, Maksim Rayskiy wrote:
> Hello,
>
> When resuming from system suspend, scsi disks are being spun up which
> takes quite a lot of time (5+ seconds in my case). The spinup is done
> synchronously, so this time adds up to overall system resume time.
> Ours is an embedded platform and we are using flash-based rootfs, so
> there is no immediate need in harddrive after resume. What is much
> more important for us is to minimize time-to-full-power. To speed up
> resume, we would like to have an option to defer the spinup or run it
> in parallel with system resume. I could not find any existing
> mechanism to do the trick, but I might have missed something.
>
> Can anybody comment on this?

Do you use asynchronous suspend/resume?

Rafael