Messages in this thread | | | Date | Sun, 26 Jan 2014 22:08:50 +0100 | From | Pavel Machek <> | Subject | Re: [PATCH 1/1] suspend: make sync() on suspend-to-RAM optional |
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Hi!
> From: Len Brown <len.brown@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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