Hi!
> From: Len Brown <len.br...@intel.com>
>
> Linux suspend-to-RAM was unreliable when first developed,
> and so sys_sync() was invoked inside the kernel at the
> start of every suspend flow.
>
> Today, many devices are invoking suspend with
> high reliability and high frequency, and they don't
> want to be forced to pay for sync on every suspend.
>
> So here we make it optional.
> De-select CONFIG_PM_SLEEP_SYNC to delete the call entirely.
> or keep CONFIG_PM_SLEEP and you can now clear the
> sys/power/sleep_sync attribte to disable the sync
> from user-space.
Dunno. Config option plus sysfs attribute is overdoing it a bit.
Maybe we could do
echo memfast > state
to enter suspend without sync? Patch should be simpler that way,
and we won't have to keep the state...
Pavel
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