memfd_secret() in 5.14
memfd_secret() in 5.14
Posted Aug 7, 2021 16:22 UTC (Sat) by khim (subscriber, #9252)In reply to: memfd_secret() in 5.14 by Wol
Parent article: memfd_secret() in 5.14
> Because a hibernated laptop is SWITCHED OFF!
And how do you know it's actually switched off? Many (most?) modern laptops have all these LEDs (power, suspend, mic off and so on) software driven.
Thus, in the end, you have to trust your software anyway.
> As mentioned, potentially waking up and causing a fire.Have you ever heard about EFI wakeup alarm clock? Your hibernated (and even, presumably, switched off) device can do that perfectly fine, too.
> A hibernated laptop is switched off and doesn't wake until you press the power switch, or wake-on-lan, or some EXTERNAL event causes it to fire up.Who told you that? I don't even know how long ago we had systems which couldn't wake up on their own volition.
> If I don't have access to a charger, and don't need my laptop, I DON'T want it burning battery!!!Power it off if it's really need to go to sleep for a few days. That's really rare need in today's world, though.
You would save much more power since after wake up there wouldn't be a browser with moder web pages which insist on draining your battery as fast as they can (LWN is rare exception).
Posted Aug 7, 2021 17:41 UTC (Sat)
by Wol (subscriber, #4433)
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Is it? Once again you're assuming everyone is the same as you.
It is NORMAL for me (living in a first world country) to have no access to mains power for several days at a time. Yes it's my choice. But if I can't recharge my laptop for a week, I want to save as much battery as I can, and that includes not having it wasting power sleeping.
(And while one person can't make much difference, why should I want to waste power? If EVERYBODY saved just a few watts here and there - and had the "let's save it" mindset), we might make a dent in global warming :-)
Cheers,
memfd_secret() in 5.14
Wol