Lower power portable Linux

Ben Scott dragonhawk at gmail.com
Wed Nov 21 19:31:32 EST 2007


On Nov 21, 2007 5:41 PM, Bill McGonigle <bill at bfccomputing.com> wrote:
> In some ways this is easier.

  How is what easier?

> As I understand it, suspend-to-disk is "just" moving all active RAM into swap ...

  Right, and launching the Space Shuttle is "just" a moving a payload
into space.  ;-)

  In particular, with both S3 and S4, you have to (1) have all the
device drivers stop talking to the hardware, (2) have all the  state
for outstanding system calls, signals, file handles, and such paused
and preserved (even through the device drivers have been turned off),
(3) on resume, re-initialize all the hardware and put everything back
the way it was before you turned the power off.

-- Ben


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