Re: [RFC] sleepy linux


* Pavel Machek <pavel@xxxxxx> wrote:

Todays hardware is mostly capable of doing better: with correctly set
up wakeups, machine can sleep and successfully pretend it is not
sleeping -- by waking up whenever something interesting happens. Of
course, it is easier on machines not connected to the network, and on
notebook computers.

Requirements:

0) Working suspend-to-RAM, with kernel being able to bring video back.

1) RTC clock that can wake up system

very nice approach! It might require smarter hardware to be really
efficient, but the generic ability for Linux to utilize S3 automatically
would _quickly_ drive the creation of smarter hardware i'm sure - so i'd
propose to include this even if it wastes power in some cases.

a quick feature request: could you please make the wake-on-RTC
capability generic and add a CONFIG_DEBUG_SUSPEND_ON_RAM=y config option
(disabled by default) that does a short 1-second suspend-to-RAM sequence
upon bootup? That way we could test s2ram automatically (which is a MUCH
needed feature for automated regression testing and automatic
bisection). In addition, some sort of 'suspend for N seconds' /sys or
/dev/rtc capability would be nice as well.

btw., how far are you from having a working prototype?

Ingo
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/